Table Of Contents
Parts per million to percent Conversion
1 parts per million (ppm) is equal to 0.0001 percent (%).
1 ppm = 0.0001 %
or
1 % = 10000 ppm
Formula
To convert a concentration from parts per million (ppm) to percent (%), divide the concentration in parts per million by 10000
c(%) = c(ppm) / 10000
Examples:
Convert 10 parts per million to percent:
c(%) = 10ppm / 10000 = 0.001 %
Conversion table
| 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 % |
| 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 |
Frequently asked questions
How do I convert parts per million to percent?
Divide the value in parts per million by 10000 to get the result in percent. For example, 5 ppm ÷ 10000 = 5.0e-4 %.
How many percent are in 1 parts per million?
1 parts per million (ppm) is equal to 1.0e-4 percent (%).
How do I convert percent back to parts per million?
Use the inverse operation: multiply the value in percent by 10000 to get the result in parts per million.
How accurate is the parts per million to percent 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:
