% to ppm Converter
ppm is parts per million and percent is parts per hundred, so 1% is 10,000 ppm. In dilute water solutions 1 ppm is about 1 mg/L.
Your numbers
ppm
500
mg/L
500
Formula
ppm = Concentration × 10000
The mg/L equivalence only holds where density is near 1 g/mL. For organic solvents you must apply the actual density.
What to enter
| Input | Default | Accepted range |
|---|---|---|
| Concentration (%)How much of the whole is solute. | 0.05 | 0 and up |
Step by step
Quick reference table
Results when only Concentration (%) changes and everything else stays put.
| Concentration (%) | ppm | mg/L |
|---|---|---|
| 0.03 | 300 | 300 |
| 0.04 | 400 | 400 |
| 0.05 | 500 | 500 |
| 0.08 | 800 | 800 |
| 0.1 | 1,000 | 1,000 |
What each result means
| Result | At default values |
|---|---|
| ppmParts per million; 1 ppm is 0.0001%. | 500 |
| mg/LMilligrams in one litre; in water this is nearly the same as ppm. | 500 |
Common mistakes
The mg/L equivalence only holds where density is near 1 g/mL. For organic solvents you must apply the actual density.
Glossary
- Concentration
- How much of the whole is solute.
- ppm
- Parts per million; 1 ppm is 0.0001%.
- mg/L
- Milligrams in one litre; in water this is nearly the same as ppm.
Frequently asked questions
Q. How is % to ppm Converter calculated?
ppm = Concentration × 10000 — ppm is parts per million and percent is parts per hundred, so 1% is 10,000 ppm. In dilute water solutions 1 ppm is about 1 mg/L.
Q. Can you walk through an example?
With Concentration 0.05%, the answer is ppm 500.
Q. What do I need to enter?
Enter Concentration. The result recalculates as you type, and an empty box counts as zero.
Q. How much does the answer move if I change a number?
Changing only Concentration (%) moves the answer to Concentration (%) 0.03 → ppm 300 and Concentration (%) 0.1 → ppm 1,000. The table below lays out five steps.
Q. How are the numbers rounded?
Money is shown to the nearest whole unit, percentages to one decimal place and everything else to two. What you see is rounded; the calculation itself carries the unrounded value forward.
Q. Anything to watch out for?
The mg/L equivalence only holds where density is near 1 g/mL. For organic solvents you must apply the actual density.
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