ppm to mg/L Converter
In water, 1 ppm = 1 mg/L. For other liquids, mg/L = ppm × density (kg/L).
ppm to mg/L chart (water)
| ppm | mg/L | ppb | % |
|---|---|---|---|
| 0.1 | 0.1 | 100 | 0.00001 |
| 0.5 | 0.5 | 500 | 0.00005 |
| 1 | 1 | 1,000 | 0.0001 |
| 2 | 2 | 2,000 | 0.0002 |
| 5 | 5 | 5,000 | 0.0005 |
| 10 | 10 | 10,000 | 0.001 |
| 50 | 50 | 50,000 | 0.005 |
| 100 | 100 | 100,000 | 0.01 |
| 250 | 250 | 250,000 | 0.025 |
| 500 | 500 | 500,000 | 0.05 |
| 1000 | 1000 | 1,000,000 | 0.1 |
FAQ
Is 1 ppm equal to 1 mg/L?
For dilute water solutions, yes: 1 liter of water weighs about 1 kg, so 1 mg per liter is 1 part per million by mass.
When is ppm not equal to mg/L?
When the liquid density differs from 1 kg/L (for example seawater, oils or concentrated solutions). Then mg/L = ppm × density (kg/L).
How do I convert ppm to ppb?
Multiply by 1,000: 1 ppm = 1,000 ppb = 1 µg/L in water.
How do I convert ppm to percent?
Divide by 10,000: 10,000 ppm = 1%.
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