Liters to Grams Converter
Liters to Grams Conversion Chart (Water, 1.00 g/mL)
| Liters | Grams (Water) |
|---|---|
| 0.1 L | 100 g |
| 0.5 L | 500 g |
| 1 L | 1,000 g |
| 1.5 L | 1,500 g |
| 2 L | 2,000 g |
| 3 L | 3,000 g |
| 5 L | 5,000 g |
| 10 L | 10,000 g |
| 20 L | 20,000 g |
| 100 L | 100,000 g |
This chart applies to water only. Every other substance has its own density — use the calculator above to pick the right one.
Popular Liters to Grams (Water) Conversions
How to Convert Liters to Grams (Liquids)
Liters measure how much space a liquid takes up. Grams measure how much it weighs.
The only thing connecting the two is density — how tightly packed the substance’s mass is within that space. Once you know a liquid’s density, the conversion is one multiplication.
Liters to Grams Formula
The ×1000 converts the density (grams per milliliter) up to grams per liter, since 1 liter = 1,000 milliliters.
For example, 2 liters of water: 2 × 1.00 × 1000 = 2,000 grams. For 2 liters of milk (density 1.03 g/mL): 2 × 1.03 × 1000 = 2,060 grams — heavier than water, because milk is slightly denser.
Grams to Liters Formula (the reverse direction)
Example: 500 g of honey ÷ (1.42 × 1000) = 0.352 liters.
Liters to Grams: Common Substances
“1 liter to grams” only has one universal answer for water. Everything else needs its own density, cross-checked here against standard reference and culinary sources; actual weight can vary slightly with temperature and brand.
| Substance | Density (g/mL) | 1 Liter Weighs |
|---|---|---|
| Water | 1.00 | 1,000 g |
| Milk (whole) | 1.03 | 1,030 g |
| Honey | 1.42 | 1,420 g |
| Maple syrup | 1.33 | 1,330 g |
| Olive oil | 0.92 | 920 g |
| Vegetable oil | 0.92 | 920 g |
| Ethanol (alcohol) | 0.789 | 789 g |
| Gasoline (petrol) | 0.74 | 740 g |
| Diesel | 0.85 | 850 g |
Select any of these — or enter a custom density — in the calculator above.
Common Liters to Grams (Water) Conversions
Since most everyday “liters to grams” searches default to water, here are the exact figures for the amounts people look up most. Because water’s density is exactly 1.00 g/mL, converting is always just ×1000 — no calculator needed.
| Liters | Grams (Water) |
|---|---|
| 0.5 L | 500 g |
| 1 L | 1,000 g |
| 1.5 L | 1,500 g |
| 1.75 L | 1,750 g |
| 2 L | 2,000 g |
| 3 L | 3,000 g |
| 4 L | 4,000 g |
| 5 L | 5,000 g |
| 10 L | 10,000 g |
| 100 L | 100,000 g |
Why Liters to Grams Isn’t Always ×1000
Water is the exception that makes the conversion look deceptively simple, and it’s also where the historical definition of the gram comes from: 1 gram was originally defined as the mass of 1 cubic centimeter (1 mL) of water. That’s the entire reason 1 liter of water weighs 1,000 grams so cleanly.
No other everyday liquid shares that exact 1:1 relationship. Oils and alcohols are less dense than water, so a liter of them weighs less than 1,000 grams.
Honey, syrups, and salty or sugary liquids are denser, so a liter weighs more. The formula above — multiply by density, then by 1,000 — is what corrects for that difference.
Converting Liters to Grams in Chemistry (Gas at STP)
In a chemistry class, “liters to grams” usually isn’t about a liquid at all — it’s about a gas. Gas volumes are measured in liters, but stoichiometry problems need an answer in grams, and the bridge between the two is the mole.
What STP Means
STP stands for Standard Temperature and Pressure. At STP, one mole of any ideal gas occupies a fixed volume, called the molar volume. Two conventions are in use: the traditional STP (0°C and 1 atm) gives a molar volume of 22.4 L/mol, and is what most introductory chemistry courses still teach.
The newer IUPAC STP (0°C and 100 kPa) gives 22.7 L/mol. The calculator above lets you choose either.
Liters to Grams at STP Formula
Where molar volume is 22.4 L/mol (traditional STP) or 22.7 L/mol (IUPAC STP), and molar mass is the gas’s own weight per mole (for example, oxygen O2 = 32.00 g/mol).
Worked Examples
Dividing a gas volume by 22.4 L/mol first gives you moles — the step most stoichiometry problems are really testing:
- 11.2 L ÷ 22.4 L/mol = 0.5 mol → as O2 (32.00 g/mol), that’s 0.5 × 32.00 = 16.00 g. As CO2 (44.01 g/mol), it’s 0.5 × 44.01 = 22.01 g.
- 22.4 L ÷ 22.4 L/mol = 1 mol → as O2, 32.00 g. As CO2, 44.01 g.
- 44.8 L ÷ 22.4 L/mol = 2 mol → as O2, 64.00 g. As CO2, 88.02 g.
The pattern holds for any gas: find the moles first by dividing by the molar volume, then multiply by that gas’s molar mass from the periodic table.
Liters to Grams via Moles and Molarity
A related but different question — “liters to grams using moles” or “molarity” — usually refers to a solution, not a gas. There, liters × molarity (mol/L) gives you moles, and moles × molar mass gives you grams. Molarity is specific to each solution and has to be given or measured; it isn’t a fixed constant like a gas’s molar volume, so there’s no single conversion factor to look up here — the calculator above covers the gas-at-STP case, since that’s the one with a fixed, well-defined constant.
Liters and Grams at a Glance
What Is a Liter?
The liter (symbol L) is a metric unit of volume equal to 1,000 cubic centimeters, or one-thousandth of a cubic meter. It measures how much space a liquid or gas occupies, regardless of what that substance weighs.
What Is a Gram?
The gram (symbol g) is a metric unit of mass, defined today as one-thousandth of the kilogram — the SI base unit of mass. Grams measure how much matter something contains, independent of the space it takes up.
Frequently Asked Questions
Is 1 liter always equal to 1000 grams?
Only for water. Water has a density of almost exactly 1.00 g/mL, so 1 liter of water weighs 1,000 grams. Any other liquid has a different density, so the same 1 liter volume will weigh more or less than 1,000 grams.
How do you convert liters to grams?
Multiply the volume in liters by the substance’s density in g/mL, then by 1,000. For water (density 1.00 g/mL), that’s liters × 1000. For example, 3 liters of milk (density 1.03 g/mL) = 3 × 1.03 × 1000 = 3,090 grams.
What do you multiply liters by to get grams?
Multiply liters by the substance’s density in g/mL, then by 1,000 to get grams. For water, that factor is simply 1,000, since water’s density is 1.00 g/mL. For any other liquid, use that liquid’s own density instead of 1.00.
How many grams are in a liter of water?
1 liter of water weighs 1,000 grams (1 kilogram), because water’s density is 1.00 g/mL and 1 liter equals 1,000 mL.
How do you convert liters to grams in chemistry (at STP)?
Divide the gas volume in liters by the molar volume (22.4 L/mol for traditional STP, or 22.7 L/mol for IUPAC STP) to get moles, then multiply by the gas’s molar mass in g/mol. For example, 11.2 L of oxygen gas at STP = 11.2 ÷ 22.4 = 0.5 mol × 32.00 g/mol = 16.00 g.
How many grams is 22.4 liters of gas at STP?
22.4 liters at STP is exactly 1 mole of any ideal gas, so the answer in grams equals that gas’s molar mass. For oxygen (O2, 32.00 g/mol) it’s 32.00 g; for carbon dioxide (CO2, 44.01 g/mol) it’s 44.01 g. Select the gas in the calculator above to get the figure for a specific gas.
How do you convert liters to grams using density?
Density (in g/mL) tells you how many grams are packed into each milliliter of a substance. Multiply the density by 1,000 to get grams per liter, then multiply by the number of liters. If you don’t know a substance’s exact density, the calculator above includes common ones, or you can enter a custom value.
What’s the difference between converting liters to grams and liters to kilograms?
They use the same density, just scaled differently. Liters × density (in kg/L) gives kilograms directly. Liters × density (in g/mL) × 1000 gives grams. Multiply the kilogram answer by 1,000 and you get the same result in grams.
More Converters
mL to mg Converter
Minutes to Decimal Converter
Litre to Kg Converter
ML to Grams Converter
Liters to Gallons Converter
Gallon to Liter Converter
