ppm to % Converter
Convert ppm to %: 1 ppm = 1 × 10⁻⁴ %. Formula, worked example, table of common values and unit definitions.
Result0.025 %
1 ppm = 1 × 10⁻⁴ %
250 ppm =
0.025 %
Formula
% = ppm × 1 × 10⁻⁴ ppm = % × 10,000
Worked example
- 250 ppm × 1 × 10⁻⁴ = 0.025 %
Common values
| ppm | % |
|---|---|
| 1 | 1 × 10⁻⁴ |
| 10 | 0.001 |
| 50 | 0.005 |
| 100 | 0.01 |
| 250 | 0.025 |
| 1,000 | 0.1 |
| 10,000 | 1 |
Unit definitions
| Unit | Equals | What it is |
|---|---|---|
| ppm | 1 × 10⁻⁶ ratio | Parts per million. Contaminant, drift and tolerance figures. |
| % | 0.01 ratio | Percent, parts per hundred. |
Frequently asked questions
How many % are in one ppm?
1 ppm = 1 × 10⁻⁴ %.
What is the formula to convert ppm to %?
% = ppm × 1 × 10⁻⁴. To go back, ppm = % × 10,000.
How do I convert ppm to percent?
Divide the ppm value by 10,000. 10,000 ppm is 1 %, and 250 ppm is 0.025 %.
Related
Opposite direction: % to ppm
Percent and PPM ConverterConversion Centre