{"id":1600,"date":"2026-07-17T02:05:02","date_gmt":"2026-07-17T02:05:02","guid":{"rendered":"https:\/\/wetflagcalculator.com\/?p=1600"},"modified":"2026-07-18T16:20:23","modified_gmt":"2026-07-18T16:20:23","slug":"pmol-l-to-pg-ml-converter","status":"publish","type":"post","link":"https:\/\/wetflagcalculator.com\/es\/pmol-l-to-pg-ml-converter\/","title":{"rendered":"pmol\/L to pg\/mL Converter"},"content":{"rendered":"\n<h2 style=\"text-align:center;font-family:'DM Sans',sans-serif;margin-bottom:20px;\">\npmol\/L to pg\/mL Converter\n<\/h2>\n\n<style>\n#pmpg*{box-sizing:border-box;margin:0;padding:0}\n#pmpg{\n  font-family:'DM Sans',system-ui,sans-serif;\n  max-width:480px;\n  margin:0 auto;\n  border:1.5px solid #e6e2db;\n  border-radius:18px;\n  padding:26px 24px 22px;\n  background:#fff;\n}\n#pmpg .lbl{\n  display:block;\n  font-size:11px;\n  font-weight:700;\n  text-transform:uppercase;\n  letter-spacing:.07em;\n  color:#999;\n  margin-bottom:5px;\n}\n#pmpg .hint{\n  font-size:12px;\n  color:#999;\n  margin-top:5px;\n  line-height:1.4;\n}\n#pmpg select,#pmpg input[type=number]{\n  width:100%;\n  height:46px;\n  padding:0 14px;\n  border:1.5px solid #e6e2db;\n  border-radius:10px;\n  font-size:15px;\n  background:#fafaf8;\n}\n#pmpg .row{\n  display:grid;\n  grid-template-columns:1fr 1fr;\n  gap:12px;\n  margin-bottom:12px;\n}\n#pmpg .full{grid-column:1\/-1}\n#pmpg .arrow{\n  display:flex;\n  align-items:center;\n  justify-content:center;\n  padding-top:22px;\n  font-size:22px;\n  color:#ccc;\n  cursor:pointer;\n}\n#pmpg-custom-wrap{display:none;margin-bottom:12px;}\n#pmpg button.convert-btn{\n  width:100%;\n  height:48px;\n  margin-top:6px;\n  background:#111;\n  color:#fff;\n  border:none;\n  border-radius:11px;\n  font-size:15px;\n  font-weight:700;\n  cursor:pointer;\n}\n#pmpg-result{\n  display:none;\n  margin-top:18px;\n  padding-top:18px;\n  border-top:1.5px solid #f0ede8;\n}\n#pmpg-result .big{\n  font-size:36px;\n  font-weight:700;\n}\n#pmpg-result .eq{\n  font-size:13px;\n  color:#888;\n  margin-top:5px;\n}\n#pmpg-share{\n  display:none;\n  margin-top:10px;\n  font-size:12px;\n  color:#999;\n  word-break:break-all;\n}\n.chart-wrap{\n  max-width:700px;\n  margin:30px auto;\n  font-family:'DM Sans',sans-serif;\n}\n.chart-wrap p.chart-title{\n  font-size:15px;\n  font-weight:400;\n  margin-bottom:10px;\n  color:#333;\n}\n.chart-wrap p.chart-note{\n  font-size:12px;\n  color:#999;\n  margin-top:8px;\n}\n.chart-wrap table{\n  width:100%;\n  border-collapse:collapse;\n}\n.chart-wrap th,\n.chart-wrap td{\n  border:1px solid #ddd;\n  padding:10px;\n  text-align:left;\n}\n.chart-wrap th{\n  background:#f7f7f7;\n}\n.similar-wrap{\n  max-width:700px;\n  margin:30px auto;\n  font-family:'DM Sans',sans-serif;\n}\n.similar-wrap h3{\n  margin-bottom:12px;\n}\n.similar-group{\n  margin-bottom:18px;\n}\n.similar-group .grp-title{\n  font-size:12px;\n  font-weight:700;\n  text-transform:uppercase;\n  letter-spacing:.06em;\n  color:#999;\n  margin-bottom:8px;\n}\n.similar-links{\n  display:flex;\n  flex-wrap:wrap;\n  gap:8px;\n}\n.similar-links a{\n  display:inline-block;\n  padding:8px 14px;\n  border:1.5px solid #e6e2db;\n  border-radius:20px;\n  font-size:13px;\n  color:#111;\n  text-decoration:none;\n  background:#fafaf8;\n}\n.similar-links a:hover{\n  background:#111;\n  color:#fff;\n  border-color:#111;\n}\n.similar-links a.active{\n  background:#111;\n  color:#fff;\n  border-color:#111;\n}\n<\/style>\n\n<div id=\"pmpg\">\n\n<div class=\"row\">\n<div class=\"full\">\n<label class=\"lbl\">Direction<\/label>\n<select id=\"pmpg-dir\" onchange=\"pmpgOnDirChange()\">\n<option value=\"pmol2pg\" selected>pmol\/L \u2192 pg\/mL<\/option>\n<option value=\"pg2pmol\">pg\/mL \u2192 pmol\/L<\/option>\n<\/select>\n<\/div>\n<\/div>\n\n<div class=\"row\">\n<div class=\"full\">\n<label class=\"lbl\">Molecule (sets molecular weight)<\/label>\n<select id=\"pmpg-mol\" onchange=\"pmpgOnMolChange()\">\n<option value=\"estradiol\" data-mw=\"272.38\" data-name=\"Estradiol (E2)\" selected>Estradiol (E2)<\/option>\n<option value=\"progesterone\" data-mw=\"314.47\" data-name=\"Progesterone\">Progesterone<\/option>\n<option value=\"testosterone\" data-mw=\"288.42\" data-name=\"Testosterone\">Testosterone<\/option>\n<option value=\"cortisol\" data-mw=\"362.46\" data-name=\"Cortisol\">Cortisol<\/option>\n<option value=\"freeT3\" data-mw=\"650.97\" data-name=\"Free T3 (Triiodothyronine)\">Free T3 (Triiodothyronine)<\/option>\n<option value=\"freeT4\" data-mw=\"776.87\" data-name=\"Free T4 (Thyroxine)\">Free T4 (Thyroxine)<\/option>\n<option value=\"pth\" data-mw=\"9500\" data-name=\"Parathyroid Hormone (PTH)\">Parathyroid Hormone (PTH)<\/option>\n<option value=\"insulin\" data-mw=\"5808\" data-name=\"Insulin\">Insulin<\/option>\n<option value=\"vitB12\" data-mw=\"1355.37\" data-name=\"Vitamin B12 (Cobalamin)\">Vitamin B12 (Cobalamin)<\/option>\n<option value=\"folate\" data-mw=\"441.40\" data-name=\"Folate (Folic Acid)\">Folate (Folic Acid)<\/option>\n<option value=\"custom\" data-mw=\"\" data-name=\"Custom molecular weight\">Custom molecular weight<\/option>\n<\/select>\n<div class=\"hint\" id=\"pmpg-mw-hint\"><\/div>\n<\/div>\n<\/div>\n\n<div class=\"row\" id=\"pmpg-custom-wrap\">\n<div class=\"full\">\n<label class=\"lbl\">Molecular weight (g\/mol, required)<\/label>\n<input type=\"number\" id=\"pmpg-custom-mw\" value=\"300\" step=\"any\">\n<\/div>\n<\/div>\n\n<div class=\"row\">\n<div>\n<label class=\"lbl\" id=\"pmpg-qty-lbl\">Value in pmol\/L<\/label>\n<input type=\"number\" id=\"pmpg-qty\" value=\"367\" step=\"any\">\n<\/div>\n\n<div>\n<label class=\"lbl\">From<\/label>\n<select id=\"pmpg-from\" disabled>\n<option selected>pmol\/L<\/option>\n<\/select>\n<\/div>\n<\/div>\n\n<div class=\"row\">\n<div class=\"arrow\" id=\"pmpg-swap\" onclick=\"pmpgSwap()\" title=\"Swap direction\">\u21c5<\/div>\n\n<div>\n<label class=\"lbl\">To<\/label>\n<select id=\"pmpg-to\" disabled>\n<option selected>pg\/mL<\/option>\n<\/select>\n<\/div>\n<\/div>\n\n<button class=\"convert-btn\" onclick=\"pmpgCalc(true)\">Convert<\/button>\n\n<div id=\"pmpg-result\">\n<div class=\"big\" id=\"pmpg-out\"><\/div>\n<div class=\"eq\" id=\"pmpg-eq\"><\/div>\n<\/div>\n\n<div id=\"pmpg-share\"><\/div>\n\n<\/div>\n\n<div class=\"chart-wrap\">\n\n<p class=\"chart-title\">pmol\/L to pg\/mL Conversion Chart (per 1 pmol\/L)<\/p>\n\n<table>\n<tbody><tr>\n<th>Molecule<\/th>\n<th>MW (g\/mol)<\/th>\n<th>1 pmol\/L equals<\/th>\n<\/tr>\n<tr><td>Estradiol (E2)<\/td><td>272.38<\/td><td>0.2724 pg\/mL<\/td><\/tr>\n<tr><td>Progesterone<\/td><td>314.47<\/td><td>0.3145 pg\/mL<\/td><\/tr>\n<tr><td>Testosterone<\/td><td>288.42<\/td><td>0.2884 pg\/mL<\/td><\/tr>\n<tr><td>Cortisol<\/td><td>362.46<\/td><td>0.3625 pg\/mL<\/td><\/tr>\n<tr><td>Free T3<\/td><td>650.97<\/td><td>0.6510 pg\/mL<\/td><\/tr>\n<tr><td>Free T4<\/td><td>776.87<\/td><td>0.7769 pg\/mL<\/td><\/tr>\n<tr><td>PTH<\/td><td>9500<\/td><td>9.5 pg\/mL<\/td><\/tr>\n<tr><td>Insulin<\/td><td>5808<\/td><td>5.808 pg\/mL<\/td><\/tr>\n<tr><td>Vitamin B12<\/td><td>1355.37<\/td><td>1.3554 pg\/mL<\/td><\/tr>\n<tr><td>Folate<\/td><td>441.4<\/td><td>0.4414 pg\/mL<\/td><\/tr>\n<\/tbody><\/table>\n\n<p class=\"chart-note\">pmol\/L is a molar concentration (a count of molecules) while pg\/mL is a mass concentration, so the molecular weight of the chosen substance is required to convert between them \u2014 larger molecules produce a larger pg\/mL value for the same pmol\/L. Estradiol is one of the most common searches for this conversion since many labs report it in pmol\/L while many US reference ranges use pg\/mL. For anything not listed, use the Custom molecular weight option and confirm against a published reference.<\/p>\n\n<\/div>\n\n<div class=\"similar-wrap\" id=\"pmpg-similar\">\n<h3>Popular pmol\/L to pg\/mL Conversions<\/h3>\n<div class=\"similar-group\">\n<div class=\"grp-title\">Estradiol<\/div>\n<div class=\"similar-links\" id=\"pmpg-sim-estradiol\"><\/div>\n<\/div>\n<div class=\"similar-group\">\n<div class=\"grp-title\">Progesterone<\/div>\n<div class=\"similar-links\" id=\"pmpg-sim-progesterone\"><\/div>\n<\/div>\n<div class=\"similar-group\">\n<div class=\"grp-title\">Testosterone<\/div>\n<div class=\"similar-links\" id=\"pmpg-sim-testosterone\"><\/div>\n<\/div>\n<div class=\"similar-group\">\n<div class=\"grp-title\">Free T3<\/div>\n<div class=\"similar-links\" id=\"pmpg-sim-freeT3\"><\/div>\n<\/div>\n<\/div>\n\n<script>\n(function(){\n\n\/\/ grams per mole, for each molecule (\"custom\" is resolved at calc time)\nvar MW={\nestradiol:272.38,\nprogesterone:314.47,\ntestosterone:288.42,\ncortisol:362.46,\nfreeT3:650.97,\nfreeT4:776.87,\npth:9500,\ninsulin:5808,\nvitB12:1355.37,\nfolate:441.40\n};\n\n\/\/ slug fragment used inside the shareable URL for each molecule\nvar SLUG={\nestradiol:\"estradiol\",\nprogesterone:\"progesterone\",\ntestosterone:\"testosterone\",\ncortisol:\"cortisol\",\nfreeT3:\"free-t3\",\nfreeT4:\"free-t4\",\npth:\"pth\",\ninsulin:\"insulin\",\nvitB12:\"vitamin-b12\",\nfolate:\"folate\",\ncustom:\"custom\"\n};\n\nfunction fmt(n){\nreturn parseFloat(n.toPrecision(10)).toString();\n}\n\nfunction getMw(key){\nif(key===\"custom\"){\nvar v=parseFloat(document.getElementById('pmpg-custom-mw').value);\nreturn isNaN(v)?0:v;\n}\nreturn MW[key];\n}\n\n\/\/ dir: \"pmol2pg\" (pmol\/L -> pg\/mL) or \"pg2pmol\" (pg\/mL -> pmol\/L)\nfunction slugFor(qty,key,dir,customMw){\nvar s=key===\"custom\"?(\"custom-\"+customMw):SLUG[key];\nif(dir===\"pmol2pg\"){\nreturn qty+\"-pmol-l-\"+s+\"-to-pg-ml\";\n}\nreturn qty+\"-pg-ml-\"+s+\"-to-pmol-l\";\n}\n\n\/\/ parses \"367-pmol-l-estradiol-to-pg-ml\" or \"100-pg-ml-custom-300-to-pmol-l\"\nfunction parseSlug(rawParam){\nif(!rawParam) return null;\nvar raw=decodeURIComponent(rawParam).toLowerCase().trim();\nvar dir,unitWord,core;\nif(raw.slice(-9)===\"-to-pg-ml\"){\ndir=\"pmol2pg\";\nunitWord=\"pmol-l\";\ncore=raw.slice(0,-9);\n}else if(raw.slice(-10)===\"-to-pmol-l\"){\ndir=\"pg2pmol\";\nunitWord=\"pg-ml\";\ncore=raw.slice(0,-10);\n}else{\nreturn null;\n}\nvar re=new RegExp(\"^([\\\\d.]+)-\"+unitWord+\"-(.+)$\");\nvar m=core.match(re);\nif(!m) return null;\nvar qty=parseFloat(m[1]);\nif(isNaN(qty)) return null;\nvar subSlug=m[2];\nvar key=null,customMw=null;\nif(subSlug.slice(0,7)===\"custom-\"){\nkey=\"custom\";\ncustomMw=parseFloat(subSlug.slice(7));\nif(isNaN(customMw)) return null;\n}else{\nfor(var k in SLUG){\nif(SLUG[k]===subSlug){key=k;break;}\n}\n}\nif(!key) return null;\nreturn {qty:qty,key:key,dir:dir,customMw:customMw};\n}\n\nfunction updateUrl(qty,key,dir){\nvar customMw=(key===\"custom\")?fmt(getMw(\"custom\")):null;\nvar slug=slugFor(qty,key,dir,customMw);\nvar url=window.location.pathname+\"?convert=\"+slug;\ntry{\nwindow.history.pushState({convert:slug},\"\",url);\n}catch(e){}\nvar molSel=document.getElementById('pmpg-mol');\nvar name=molSel.querySelector('option[value=\"'+key+'\"]').getAttribute('data-name');\nvar title=(dir===\"pmol2pg\")\n? (qty+\" pmol\/L to pg\/mL \u2014 \"+name+\" Conversion\")\n: (qty+\" pg\/mL to pmol\/L \u2014 \"+name+\" Conversion\");\ndocument.title=title;\nvar metaDesc=document.querySelector('meta[name=\"description\"]');\nif(metaDesc){\nvar mw=getMw(key);\nvar desc=(dir===\"pmol2pg\")\n? (qty+\" pmol\/L of \"+name+\" equals \"+fmt(qty*mw\/1000)+\" pg\/mL.\")\n: (qty+\" pg\/mL of \"+name+\" equals \"+fmt(qty*1000\/mw)+\" pmol\/L.\");\nmetaDesc.setAttribute(\"content\",desc+\" Free pmol\/L to pg\/mL converter using molecular weight for hormones, thyroid markers and vitamins.\");\n}\nvar shareEl=document.getElementById(\"pmpg-share\");\nshareEl.style.display=\"block\";\nshareEl.textContent=\"Shareable link: \"+window.location.origin+url;\nhighlightActive(slug);\n}\n\nfunction highlightActive(slug){\ndocument.querySelectorAll(\".similar-links a\").forEach(function(a){\nif(a.getAttribute(\"data-slug\")===slug){\na.classList.add(\"active\");\n}else{\na.classList.remove(\"active\");\n}\n});\n}\n\n\/\/ keeps quantity label + From\/To boxes in sync with the chosen direction\nwindow.pmpgOnDirChange=function(){\nvar dir=document.getElementById('pmpg-dir').value;\nvar qtyLbl=document.getElementById('pmpg-qty-lbl');\nvar fromSel=document.getElementById('pmpg-from');\nvar toSel=document.getElementById('pmpg-to');\nif(dir===\"pmol2pg\"){\nqtyLbl.textContent=\"Value in pmol\/L\";\nfromSel.innerHTML='<option selected>pmol\/L<\/option>';\ntoSel.innerHTML='<option selected>pg\/mL<\/option>';\n}else{\nqtyLbl.textContent=\"Value in pg\/mL\";\nfromSel.innerHTML='<option selected>pg\/mL<\/option>';\ntoSel.innerHTML='<option selected>pmol\/L<\/option>';\n}\n};\n\nwindow.pmpgOnMolChange=function(){\nvar molSel=document.getElementById('pmpg-mol');\nvar key=molSel.value;\nvar wrap=document.getElementById('pmpg-custom-wrap');\nvar hint=document.getElementById('pmpg-mw-hint');\nwrap.style.display=(key===\"custom\")?\"grid\":\"none\";\nif(key===\"custom\"){\nhint.textContent=\"\";\n}else{\nvar mw=MW[key];\nvar factor=fmt(mw\/1000);\nhint.textContent=\"Molecular weight \"+mw+\" g\/mol. 1 pmol\/L = \"+factor+\" pg\/mL.\";\n}\n};\n\nwindow.pmpgSwap=function(){\nvar dirSel=document.getElementById('pmpg-dir');\ndirSel.value=(dirSel.value===\"pmol2pg\")?\"pg2pmol\":\"pmol2pg\";\npmpgOnDirChange();\n};\n\nwindow.pmpgCalc=function(pushUrl){\n\nvar qty=parseFloat(document.getElementById('pmpg-qty').value);\nif(isNaN(qty)) return;\n\nvar dir=document.getElementById('pmpg-dir').value;\nvar molSel=document.getElementById('pmpg-mol');\nvar key=molSel.value;\nvar name=molSel.options[molSel.selectedIndex].getAttribute('data-name');\nvar mw=getMw(key);\n\nif(!mw || mw<=0){\ndocument.getElementById('pmpg-out').textContent='Enter a valid molecular weight';\ndocument.getElementById('pmpg-eq').textContent='';\ndocument.getElementById('pmpg-result').style.display='block';\nreturn;\n}\n\nvar result, fromUnit, toUnit;\nif(dir===\"pmol2pg\"){\nresult=qty*mw\/1000;\nfromUnit=\"pmol\/L\";\ntoUnit=\"pg\/mL\";\n}else{\nresult=qty*1000\/mw;\nfromUnit=\"pg\/mL\";\ntoUnit=\"pmol\/L\";\n}\n\ndocument.getElementById('pmpg-out').textContent=\nfmt(result)+' '+toUnit;\n\ndocument.getElementById('pmpg-eq').textContent=\nqty+' '+fromUnit+' of '+name+' = '+fmt(result)+' '+toUnit+' (MW: '+fmt(mw)+' g\/mol)';\n\ndocument.getElementById('pmpg-result').style.display='block';\n\nif(pushUrl){\nupdateUrl(qty,key,dir);\n}\n\n};\n\n\/\/ builds the \"Popular pmol\/L to pg\/mL Conversions\" link rows\nfunction buildSimilar(){\nvar sets={\n\"pmpg-sim-estradiol\":{key:\"estradiol\",vals:[37,73,110,184,367,734]},\n\"pmpg-sim-progesterone\":{key:\"progesterone\",vals:[5,20,50,100,300]},\n\"pmpg-sim-testosterone\":{key:\"testosterone\",vals:[5,20,50,100]},\n\"pmpg-sim-freeT3\":{key:\"freeT3\",vals:[3,5,7,10]}\n};\nfor(var id in sets){\nvar cfg=sets[id];\nvar wrap=document.getElementById(id);\nif(!wrap) continue;\nvar html=\"\";\nfor(var i=0;i<cfg.vals.length;i++){\nvar qty=cfg.vals[i];\nvar slug=slugFor(qty,cfg.key,'pmol2pg',null);\nhtml+='<a href=\"?convert='+slug+'\" data-slug=\"'+slug+'\" data-qty=\"'+qty+'\" data-key=\"'+cfg.key+'\" data-dir=\"pmol2pg\">'+qty+' pmol\/L<\/a>';\n}\nwrap.innerHTML=html;\n}\n\n\/\/ intercept clicks so navigation is instant (no full reload) but the\n\/\/ href stays real, so the links work and are crawlable even without JS\ndocument.getElementById('pmpg-similar').addEventListener('click',function(e){\nvar a=e.target.closest('a[data-slug]');\nif(!a) return;\ne.preventDefault();\ndocument.getElementById('pmpg-qty').value=a.getAttribute('data-qty');\ndocument.getElementById('pmpg-mol').value=a.getAttribute('data-key');\ndocument.getElementById('pmpg-dir').value=a.getAttribute('data-dir');\npmpgOnDirChange();\npmpgOnMolChange();\npmpgCalc(true);\nwindow.scrollTo({top:document.getElementById('pmpg').offsetTop-20,behavior:'smooth'});\n});\n}\n\nfunction loadFromUrl(){\nvar params=new URLSearchParams(window.location.search);\nvar parsed=parseSlug(params.get('convert'));\nif(parsed){\ndocument.getElementById('pmpg-qty').value=parsed.qty;\ndocument.getElementById('pmpg-mol').value=parsed.key;\ndocument.getElementById('pmpg-dir').value=parsed.dir;\npmpgOnDirChange();\npmpgOnMolChange();\nif(parsed.key===\"custom\" && parsed.customMw!==null){\ndocument.getElementById('pmpg-custom-mw').value=parsed.customMw;\n}\npmpgCalc(false); \/\/ don't re-push, URL is already correct\nupdateUrl(parsed.qty,parsed.key,parsed.dir); \/\/ still set title\/meta\/highlight\/share text\n}else{\npmpgOnDirChange();\npmpgOnMolChange();\npmpgCalc(false);\n}\n}\n\n\/\/ handle browser back\/forward\nwindow.addEventListener('popstate',function(){\nloadFromUrl();\n});\n\nwindow.addEventListener('load',function(){\nbuildSimilar();\nloadFromUrl();\n});\n\n})();\n<\/script>\n\n\n<div class=\"qMYqUG_convSearchResultHighlightRoot\">\n<div class=\"\" data-turn-id-container=\"request-WEB:586cbeb0-ec70-45fe-87ad-d08f03c041f6-0\" data-is-intersecting=\"true\">\n<section class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [&amp;:has([data-writing-block])&gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-WEB:586cbeb0-ec70-45fe-87ad-d08f03c041f6-0\" data-turn-id-container=\"request-WEB:586cbeb0-ec70-45fe-87ad-d08f03c041f6-0\" data-testid=\"conversation-turn-2\" data-turn=\"assistant\">\n<div class=\"text-base my-auto mx-auto pb-3 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\">\n<div class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\" data-conversation-screenshot-content=\"\">\n<div class=\"flex max-w-full flex-col gap-4 grow\">\n<div class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+&amp;]:mt-1\" dir=\"auto\" tabindex=\"0\" data-message-author-role=\"assistant\" data-message-id=\"84477f1f-a726-4f62-8dd4-53baeebc1ef3\" data-message-model-slug=\"gpt-5-5\" data-turn-start-message=\"true\">\n<div class=\"flex w-full flex-col gap-1 empty:hidden\">\n<div class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\">\n<h2 data-section-id=\"1auoq4y\" data-start=\"500\" data-end=\"559\">pmol\/L to pg\/mL: Why There&#8217;s No Single Number to Memorize<\/h2>\n<p data-start=\"561\" data-end=\"1065\">If you searched <strong data-start=\"577\" data-end=\"598\">&#8220;pmol\/L to pg\/mL&#8221;<\/strong> hoping for one clean multiplier the way ng\/mL to ppm gave you one, here&#8217;s the catch: there isn&#8217;t one. Type that exact phrase into a search engine and you&#8217;ll find factors that flatly contradict each other. One page says multiply by <strong data-start=\"830\" data-end=\"838\">0.27<\/strong>, another says <strong data-start=\"853\" data-end=\"861\">1.36<\/strong>, and a third says <strong data-start=\"880\" data-end=\"888\">0.65<\/strong>. None of them are wrong. They&#8217;re simply answering the question for completely different substances, and the page often doesn&#8217;t make that obvious until several paragraphs later.<\/p>\n<h2 data-section-id=\"rhpeor\" data-start=\"1067\" data-end=\"1121\">Is There One Conversion Factor for pmol\/L to pg\/mL?<\/h2>\n<p data-start=\"1123\" data-end=\"1213\">No, and this is the single most important thing to understand before you convert anything.<\/p>\n<p data-start=\"1215\" data-end=\"1243\"><strong data-start=\"1215\" data-end=\"1225\">pmol\/L<\/strong> counts molecules.<\/p>\n<p data-start=\"1245\" data-end=\"1277\"><strong data-start=\"1245\" data-end=\"1254\">pg\/mL<\/strong> measures their weight.<\/p>\n<p data-start=\"1279\" data-end=\"1455\">The bridge between a molecule count and a weight is the molecule&#8217;s <strong data-start=\"1346\" data-end=\"1366\">molecular weight<\/strong>, and molecular weight is different for every substance\u2014sometimes dramatically different.<\/p>\n<p data-start=\"1457\" data-end=\"1645\">Estradiol and Vitamin B12 are both commonly reported in these units, but their molecular weights are nowhere close to each other. As a result, their conversion factors aren&#8217;t close either.<\/p>\n<h2 data-section-id=\"1kqtd38\" data-start=\"1647\" data-end=\"1710\">Why the Same Two Units Convert Differently for Every Hormone<\/h2>\n<p data-start=\"1712\" data-end=\"1769\">A picomole of a small, light molecule weighs very little.<\/p>\n<p data-start=\"1771\" data-end=\"1883\">A picomole of a large, heavy molecule weighs much more, even though it&#8217;s still exactly one picomole of material.<\/p>\n<p data-start=\"1885\" data-end=\"2004\">Vitamin B12 (Cobalamin) has a molecular weight of approximately <strong data-start=\"1949\" data-end=\"1964\">1,355 g\/mol<\/strong>, making it a relatively heavy molecule.<\/p>\n<p data-start=\"2006\" data-end=\"2061\">Estradiol has a molecular weight of only <strong data-start=\"2047\" data-end=\"2060\">272 g\/mol<\/strong>.<\/p>\n<p data-start=\"2063\" data-end=\"2197\">Convert the same pmol\/L value for both substances and Vitamin B12 will produce a pg\/mL value roughly five times larger than estradiol.<\/p>\n<p data-start=\"2199\" data-end=\"2288\">Nothing is wrong with the math\u2014that difference simply reflects the size of the molecules.<\/p>\n<h2 data-section-id=\"cwgwqk\" data-start=\"2290\" data-end=\"2311\">The Actual Formula<\/h2>\n<p data-start=\"2313\" data-end=\"2365\"><strong data-start=\"2313\" data-end=\"2365\">pg\/mL = pmol\/L \u00d7 molecular weight (g\/mol) \u00f7 1000<\/strong><\/p>\n<p data-start=\"2367\" data-end=\"2386\">Reverse conversion:<\/p>\n<p data-start=\"2388\" data-end=\"2440\"><strong data-start=\"2388\" data-end=\"2440\">pmol\/L = pg\/mL \u00d7 1000 \u00f7 molecular weight (g\/mol)<\/strong><\/p>\n<p data-start=\"2442\" data-end=\"2503\">The molecular weight is doing all the work in these formulas.<\/p>\n<p data-start=\"2505\" data-end=\"2605\">Use the correct molecular weight for your specific substance and the calculation is straightforward.<\/p>\n<p data-start=\"2607\" data-end=\"2726\">Use the wrong molecular weight\u2014even one that seems reasonable\u2014and you&#8217;ll get a precise but completely incorrect result.<\/p>\n<h2 data-section-id=\"1y9djyl\" data-start=\"2728\" data-end=\"2761\">Estradiol: 367 pmol\/L to pg\/mL<\/h2>\n<p data-start=\"2763\" data-end=\"2808\">Estradiol molecular weight = <strong data-start=\"2792\" data-end=\"2808\">272.38 g\/mol<\/strong><\/p>\n<p data-start=\"2810\" data-end=\"2847\">367 \u00d7 272.38 \u00f7 1000 = <strong data-start=\"2832\" data-end=\"2847\">99.98 pg\/mL<\/strong><\/p>\n<h2 data-section-id=\"187dlo2\" data-start=\"2849\" data-end=\"2884\">Vitamin B12: 300 pmol\/L to pg\/mL<\/h2>\n<p data-start=\"2886\" data-end=\"2934\">Vitamin B12 molecular weight = <strong data-start=\"2917\" data-end=\"2934\">1,355.4 g\/mol<\/strong><\/p>\n<p data-start=\"2936\" data-end=\"2973\">300 \u00d7 1355.4 \u00f7 1000 = <strong data-start=\"2958\" data-end=\"2973\">406.6 pg\/mL<\/strong><\/p>\n<h2 data-section-id=\"1efznr9\" data-start=\"2975\" data-end=\"3004\">Free T3: 6 pmol\/L to pg\/mL<\/h2>\n<p data-start=\"3006\" data-end=\"3049\">Free T3 molecular weight = <strong data-start=\"3033\" data-end=\"3049\">650.98 g\/mol<\/strong><\/p>\n<p data-start=\"3051\" data-end=\"3084\">6 \u00d7 650.98 \u00f7 1000 = <strong data-start=\"3071\" data-end=\"3084\">3.9 pg\/mL<\/strong><\/p>\n<p data-start=\"3086\" data-end=\"3232\">Notice how differently similar input values produce different results. The molecular weight\u2014not the calculation\u2014is responsible for the difference.<\/p>\n<h2 data-section-id=\"r1q1nq\" data-start=\"3234\" data-end=\"3277\">What Happens If You Use the Wrong Factor<\/h2>\n<p data-start=\"3279\" data-end=\"3459\">Imagine you&#8217;re converting a Vitamin B12 result but accidentally use an estradiol conversion factor because a website doesn&#8217;t clearly identify which substance the factor belongs to.<\/p>\n<p data-start=\"3461\" data-end=\"3482\">Using <strong data-start=\"3467\" data-end=\"3481\">300 pmol\/L<\/strong>:<\/p>\n<ul data-start=\"3484\" data-end=\"3586\">\n<li data-section-id=\"1a1u66e\" data-start=\"3484\" data-end=\"3533\">Correct Vitamin B12 conversion: <strong data-start=\"3518\" data-end=\"3533\">406.6 pg\/mL<\/strong><\/li>\n<li data-section-id=\"6m44ky\" data-start=\"3534\" data-end=\"3586\">Incorrect estradiol conversion: <strong data-start=\"3568\" data-end=\"3586\">about 82 pg\/mL<\/strong><\/li>\n<\/ul>\n<p data-start=\"3588\" data-end=\"3622\">That&#8217;s not a small rounding error.<\/p>\n<p data-start=\"3624\" data-end=\"3732\">It&#8217;s approximately a <strong data-start=\"3645\" data-end=\"3669\">five-fold difference<\/strong>, potentially making a normal result appear severely deficient.<\/p>\n<p data-start=\"3734\" data-end=\"3837\">Always verify that the molecular weight belongs to the exact substance shown on your laboratory report.<\/p>\n<h2 data-section-id=\"1pajiim\" data-start=\"3839\" data-end=\"3888\">Common Substances and Their Conversion Factors<\/h2>\n<div class=\"TyagGW_tableContainer\">\n<div class=\"group TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"3890\" data-end=\"4220\">\n<thead data-start=\"3890\" data-end=\"3951\">\n<tr data-start=\"3890\" data-end=\"3951\">\n<th class=\"last:pe-10\" data-start=\"3890\" data-end=\"3902\" data-col-size=\"sm\">Substance<\/th>\n<th class=\"last:pe-10\" data-start=\"3902\" data-end=\"3929\" data-col-size=\"sm\">Molecular Weight (g\/mol)<\/th>\n<th class=\"last:pe-10\" data-start=\"3929\" data-end=\"3951\" data-col-size=\"sm\">Multiply pmol\/L by<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"4014\" data-end=\"4220\">\n<tr data-start=\"4014\" data-end=\"4049\">\n<td data-start=\"4014\" data-end=\"4031\" data-col-size=\"sm\">Estradiol (E2)<\/td>\n<td data-start=\"4031\" data-end=\"4040\" data-col-size=\"sm\">272.38<\/td>\n<td data-start=\"4040\" data-end=\"4049\" data-col-size=\"sm\">0.272<\/td>\n<\/tr>\n<tr data-start=\"4050\" data-end=\"4094\">\n<td data-start=\"4050\" data-end=\"4076\" data-col-size=\"sm\">Vitamin B12 (Cobalamin)<\/td>\n<td data-col-size=\"sm\" data-start=\"4076\" data-end=\"4085\">1355.4<\/td>\n<td data-col-size=\"sm\" data-start=\"4085\" data-end=\"4094\">1.355<\/td>\n<\/tr>\n<tr data-start=\"4095\" data-end=\"4123\">\n<td data-start=\"4095\" data-end=\"4105\" data-col-size=\"sm\">Free T3<\/td>\n<td data-start=\"4105\" data-end=\"4114\" data-col-size=\"sm\">650.98<\/td>\n<td data-col-size=\"sm\" data-start=\"4114\" data-end=\"4123\">0.651<\/td>\n<\/tr>\n<tr data-start=\"4124\" data-end=\"4152\">\n<td data-start=\"4124\" data-end=\"4134\" data-col-size=\"sm\">Free T4<\/td>\n<td data-col-size=\"sm\" data-start=\"4134\" data-end=\"4143\">776.87<\/td>\n<td data-col-size=\"sm\" data-start=\"4143\" data-end=\"4152\">0.777<\/td>\n<\/tr>\n<tr data-start=\"4153\" data-end=\"4186\">\n<td data-start=\"4153\" data-end=\"4168\" data-col-size=\"sm\">Progesterone<\/td>\n<td data-col-size=\"sm\" data-start=\"4168\" data-end=\"4177\">314.46<\/td>\n<td data-col-size=\"sm\" data-start=\"4177\" data-end=\"4186\">0.314<\/td>\n<\/tr>\n<tr data-start=\"4187\" data-end=\"4220\">\n<td data-start=\"4187\" data-end=\"4202\" data-col-size=\"sm\">Testosterone<\/td>\n<td data-start=\"4202\" data-end=\"4211\" data-col-size=\"sm\">288.42<\/td>\n<td data-col-size=\"sm\" data-start=\"4211\" data-end=\"4220\">0.288<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<h2 data-section-id=\"3di63w\" data-start=\"4222\" data-end=\"4251\">A Word on Reference Ranges<\/h2>\n<p data-start=\"4253\" data-end=\"4394\">After converting your value correctly, compare it with the reference range printed on your own laboratory report rather than a generic chart.<\/p>\n<p data-start=\"4396\" data-end=\"4435\">Reference ranges can vary depending on:<\/p>\n<ul data-start=\"4437\" data-end=\"4528\">\n<li data-section-id=\"1o4rye\" data-start=\"4437\" data-end=\"4442\">Sex<\/li>\n<li data-section-id=\"1o4g97\" data-start=\"4443\" data-end=\"4448\">Age<\/li>\n<li data-section-id=\"1ycc2jg\" data-start=\"4449\" data-end=\"4472\">Menstrual cycle phase<\/li>\n<li data-section-id=\"1hdlw87\" data-start=\"4473\" data-end=\"4491\">Pregnancy status<\/li>\n<li data-section-id=\"aviwpe\" data-start=\"4492\" data-end=\"4510\">Laboratory assay<\/li>\n<li data-section-id=\"1ezzfn7\" data-start=\"4511\" data-end=\"4528\">Reporting units<\/li>\n<\/ul>\n<h2 data-section-id=\"cgqdtg\" data-start=\"4530\" data-end=\"4550\">The Short Version<\/h2>\n<p data-start=\"4552\" data-end=\"4612\">There is <strong data-start=\"4561\" data-end=\"4611\">no universal pmol\/L to pg\/mL conversion factor<\/strong>.<\/p>\n<p data-start=\"4614\" data-end=\"4709\">The correct calculation always depends on the molecular weight of the substance being measured.<\/p>\n<p data-start=\"4711\" data-end=\"4728\">Use this formula:<\/p>\n<p data-start=\"4730\" data-end=\"4782\"><strong data-start=\"4730\" data-end=\"4782\">pg\/mL = pmol\/L \u00d7 molecular weight (g\/mol) \u00f7 1000<\/strong><\/p>\n<p data-start=\"4784\" data-end=\"4953\">Whether you&#8217;re converting estradiol, Vitamin B12, Free T3, Free T4, testosterone, progesterone, or another substance, the molecular weight determines the correct answer.<\/p>\n<p data-start=\"4955\" data-end=\"5222\" data-is-last-node=\"\" data-is-only-node=\"\">Rather than looking up molecular weights manually every time, our <strong data-start=\"5021\" data-end=\"5050\">pmol\/L to pg\/mL Converter<\/strong> includes the correct conversion factors for estradiol, Vitamin B12, Free T3, Free T4, and other common laboratory substances, helping you avoid costly conversion mistakes.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>pmol\/L to pg\/mL Converter Direction pmol\/L \u2192 pg\/mLpg\/mL \u2192 pmol\/L Molecule (sets molecular weight) Estradiol (E2)ProgesteroneTestosteroneCortisolFree T3 (Triiodothyronine)Free T4 (Thyroxine)Parathyroid Hormone (PTH)InsulinVitamin B12 (Cobalamin)Folate (Folic Acid)Custom molecular weight Molecular weight (g\/mol, required) Value in pmol\/L From pmol\/L \u21c5 To pg\/mL Convert pmol\/L to pg\/mL Conversion Chart (per 1 pmol\/L) Molecule MW (g\/mol) 1 pmol\/L equals&#8230;<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-1600","post","type-post","status-publish","format-standard","hentry","category-wetflag"],"_links":{"self":[{"href":"https:\/\/wetflagcalculator.com\/es\/wp-json\/wp\/v2\/posts\/1600","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wetflagcalculator.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wetflagcalculator.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wetflagcalculator.com\/es\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wetflagcalculator.com\/es\/wp-json\/wp\/v2\/comments?post=1600"}],"version-history":[{"count":0,"href":"https:\/\/wetflagcalculator.com\/es\/wp-json\/wp\/v2\/posts\/1600\/revisions"}],"wp:attachment":[{"href":"https:\/\/wetflagcalculator.com\/es\/wp-json\/wp\/v2\/media?parent=1600"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wetflagcalculator.com\/es\/wp-json\/wp\/v2\/categories?post=1600"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wetflagcalculator.com\/es\/wp-json\/wp\/v2\/tags?post=1600"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}