Parts per million to milligrams per liter
Type a value in ppm to get it in mg/L instantly.
1mg/L
That's 20× as concentrated as an ozone alert, while pool chlorine is 2× stronger. In a liter of water that is about 1 mg.
What it means
How strong is that?
For dilute water solutions 1 ppm equals 1 mg/L, because a liter of water weighs a kilogram. For air and other liquids that shortcut does not hold.
The math
How to convert ppm to mg/L
To convert parts per million to milligrams per liter, multiply by 1.
Example: 1 ppm × 1 = 1 mg/L.
In the other direction, 1 mg/L = 1 ppm.
Every unit
Your concentration in every unit
Tables
ppm to mg/L conversion table
| ppm | mg/L |
|---|---|
| 0.001 ppm | 0.001 mg/L |
| 0.01 ppm | 0.01 mg/L |
| 0.1 ppm | 0.1 mg/L |
| 0.5 ppm | 0.5 mg/L |
| 1 ppm | 1 mg/L |
| 2 ppm | 2 mg/L |
| 5 ppm | 5 mg/L |
| 10 ppm | 10 mg/L |
| 25 ppm | 25 mg/L |
| 50 ppm | 50 mg/L |
| 75 ppm | 75 mg/L |
| 100 ppm | 100 mg/L |
mg/L to ppm conversion table
| mg/L | ppm |
|---|---|
| 0.001 mg/L | 0.001 ppm |
| 0.01 mg/L | 0.01 ppm |
| 0.1 mg/L | 0.1 ppm |
| 0.5 mg/L | 0.5 ppm |
| 1 mg/L | 1 ppm |
| 2 mg/L | 2 ppm |
| 5 mg/L | 5 ppm |
| 10 mg/L | 10 ppm |
| 25 mg/L | 25 ppm |
| 50 mg/L | 50 ppm |
| 75 mg/L | 75 ppm |
| 100 mg/L | 100 ppm |
Quick answers
Quick answers
- How many mg/L is 1 ppm?
- 1 ppm is 1 mg/L.
- How many mg/L is 10 ppm?
- 10 ppm is 10 mg/L.
The units
About these units
Parts per million (ppm)
One part in a million. Water quality, CO₂ levels and trace metals are reported in ppm.
Milligrams per liter (mg/L)
For dilute water solutions this equals ppm exactly, which is why lab reports mix the two.
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