Parts per million to percent
Type a value in ppm to get it in % instantly.
0.0001%
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.
Convert the other way: % to ppm
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 %
To convert parts per million to percent, multiply by 0.0001.
Example: 1 ppm × 0.0001 = 0.0001 %.
In the other direction, 1 % = 10,000 ppm.
Every unit
Your concentration in every unit
Tables
ppm to % conversion table
| ppm | % |
|---|---|
| 0.001 ppm | 1×10⁻⁷ % |
| 0.01 ppm | 1×10⁻⁶ % |
| 0.1 ppm | 1×10⁻⁵ % |
| 0.5 ppm | 5×10⁻⁵ % |
| 1 ppm | 0.0001 % |
| 2 ppm | 0.0002 % |
| 5 ppm | 0.0005 % |
| 10 ppm | 0.001 % |
| 25 ppm | 0.0025 % |
| 50 ppm | 0.005 % |
| 75 ppm | 0.0075 % |
| 100 ppm | 0.01 % |
% to ppm conversion table
| % | ppm |
|---|---|
| 0.001 % | 10 ppm |
| 0.01 % | 100 ppm |
| 0.1 % | 1,000 ppm |
| 0.5 % | 5,000 ppm |
| 1 % | 10,000 ppm |
| 2 % | 20,000 ppm |
| 5 % | 50,000 ppm |
| 10 % | 100,000 ppm |
| 25 % | 250,000 ppm |
| 50 % | 500,000 ppm |
| 75 % | 750,000 ppm |
| 100 % | 1,000,000 ppm |
Quick answers
Quick answers
- How many % is 1 ppm?
- 1 ppm is 0.0001 %.
- How many % is 10 ppm?
- 10 ppm is 0.001 %.
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.
Percent (%)
Parts per hundred. One percent is 10,000 ppm.
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