Table Of Contents
Percent to parts per million Conversion
1 percent (%) is equal to 10000 parts per million (ppm).
1 % = 10000 ppm
or
1 ppm = 0.0001 %
Formula
To convert a concentration from percent (%) to parts per million (ppm), multiply the concentration in percent by 10000
c(ppm) = c(%) × 10000
Examples:
Convert 25 percent to parts per million:
c(ppm) = 25% × 10000 = 250000 ppm
Conversion table
| Percent (%) | Parts per million (ppm) |
|---|---|
| 1 % | 10000 ppm |
| 2 % | 20000 ppm |
| 3 % | 30000 ppm |
| 5 % | 50000 ppm |
| 10 % | 100000 ppm |
| 20 % | 200000 ppm |
| 25 % | 250000 ppm |
| 50 % | 500000 ppm |
| 75 % | 750000 ppm |
| 100 % | 1000000 ppm |
| 250 % | 2500000 ppm |
| 500 % | 5000000 ppm |
| 1000 % | 10000000 ppm |
| Parts per million (ppm) | Percent (%) |
|---|---|
| 1 ppm | 1.0e-4 % |
| 2 ppm | 2.0e-4 % |
| 3 ppm | 3.0e-4 % |
| 5 ppm | 5.0e-4 % |
| 10 ppm | 0.001 % |
| 20 ppm | 0.002 % |
| 25 ppm | 0.0025 % |
| 50 ppm | 0.005 % |
| 75 ppm | 0.0075 % |
| 100 ppm | 0.01 % |
| 250 ppm | 0.025 % |
| 500 ppm | 0.05 % |
| 1000 ppm | 0.1 % |
Frequently asked questions
How do I convert percent to parts per million?
Multiply the value in percent by 10000 to get the result in parts per million. For example, 5 % × 10000 = 50000 ppm.
How many parts per million are in 1 percent?
1 percent (%) is equal to 10000 parts per million (ppm).
How do I convert parts per million back to percent?
Use the inverse operation: divide the value in parts per million by 10000 to get the result in percent.
How accurate is the percent to parts per million conversion?
The converter multiplies by the conversion factor 10000 and rounds the result to 9 decimal places by default. You can increase or reduce the precision with the digits option on this page.
Sources
Conversion factors are based on internationally recognised standards:
