ppm to grams Converter

To find how many grams make a given ppm, multiply by the total mass and divide by a million.

The ppm to grams formula

A ppm is one part of the substance in a million parts of the whole (Wikipedia: Parts-per notation).

So the grams equal the ppm times the total mass, divided by 1,000,000.

Take 250 ppm in 2,000 g. 250 × 2,000 ÷ 1,000,000 gives 0.5 g.

Take 100 ppm in 50,000 g. 100 × 50,000 ÷ 1,000,000 gives 5 g.

ppm to grams step by step

Enter the ppm.

Enter the total grams.

g is the result. The last column gives grams per 1 ppm.

How to convert ppm to grams step by step

1. Enter the ppm.
2. Enter the total grams.
3. Read the result in g.
4. Check it against the quick table.

The total mass must be in grams, and it includes the substance.

ppm to grams conversion table

The highlighted row is the default of the calculator. The last column gives grams per 1 ppm.

A quick mental shortcut for ppm to grams

For a total of 1,000,000 g, the ppm is the grams.

So 5 ppm in 1,000,000 g is 5 g.

Grams or milligrams

A small ppm in a small total gives a tiny mass in grams.

Multiply by 1,000 to read the answer in mg.

What total to use

Use the whole mass of the mix.

For a very small amount, the carrier mass is close enough.

Worked example: 250 ppm in 2,000 g

250 ppm in 2,000 g gives 0.5 g.

The same inputs give 0.002 grams per 1 ppm in the last column.

Worked example: 100 ppm in 50,000 g

100 ppm in 50,000 g gives 5 g.

The same inputs give 0.05 grams per 1 ppm in the last column.

Worked example: 5 ppm in 1,000,000 g

5 ppm in 1,000,000 g gives 5 g.

The same inputs give 1 gram per 1 ppm in the last column.

A dosing example

To make 50,000 g of mix at 100 ppm, you need 5 g.

That is 5,000 mg.

A small batch

In 2,000 g of mix at 250 ppm, you need 0.5 g.

That is 500 mg.

Going the other way

To go back, multiply the grams by 1,000,000 and divide by the total grams.

So 0.5 g for 250 ppm in 2,000 g goes back to 250 ppm.

Check your answer

Reverse the answer with the back formula.

You should land on 250 ppm for 250 ppm in 2,000 g.

Another worked example

40 ppm in 25,000 g is 1 g, because 40 times 25,000 divided by 1,000,000 is 1.

Checking your result

Divide the grams by the total and multiply by 1,000,000. 1 g in 25,000 g gives back 40 ppm.

Quick conversion answers

Where this conversion is used

Water, soil and air tests report traces in ppm.

Kitchen and postal scales read grams.

Water and soil testers mix and dose samples.

Food and lab staff prepare spiked samples.

Common mistakes to avoid

• Mixing units. Keep both inputs in the units named on the page.
• Mixing up the direction. Here 100 ppm in 50,000 g is 5 g, so a correct answer comes out smaller than the number you start with.
• Mixing mass and volume. Keep the same basis on both sides.
• Forgetting the amount. Grams depend on the amount of solution, so 10 ppm in 1 kg is 10 mg, not 10 g.

Related converters

• grams to ppm
• ppm to kg
• ppm to volume
• mcg to ppm
• ppm to lbs per acre

Example: 5 ppm in 1,000,000 g

5 ppm in 1,000,000 g gives 5 g.

The same inputs give 1 gram per 1 ppm in the last column.

Example: 1,000 ppm in 500 g

1,000 ppm in 500 g gives 0.5 g.

The same inputs give 0.0005 grams per 1 ppm in the last column.

Frequently asked questions

Sources

• Wikipedia: Parts-per notation (en.wikipedia.org)