Table Of Contents
Parts per million to permille Conversion
1 parts per million (ppm) is equal to 0.001 permille (‰).
1 ppm = 0.001 ‰
or
1 ‰ = 1000 ppm
Formula
To convert a concentration from parts per million (ppm) to permille (‰), divide the concentration in parts per million by 1000
c(‰) = c(ppm) / 1000
Examples:
Convert 25 parts per million to permille:
c(‰) = 25ppm / 1000 = 0.025 ‰
Conversion table
| Parts per million (ppm) | Permille (‰) |
|---|---|
| 1 ppm | 0.001 ‰ |
| 2 ppm | 0.002 ‰ |
| 3 ppm | 0.003 ‰ |
| 5 ppm | 0.005 ‰ |
| 10 ppm | 0.01 ‰ |
| 20 ppm | 0.02 ‰ |
| 25 ppm | 0.025 ‰ |
| 50 ppm | 0.05 ‰ |
| 75 ppm | 0.075 ‰ |
| 100 ppm | 0.1 ‰ |
| 250 ppm | 0.25 ‰ |
| 500 ppm | 0.5 ‰ |
| 1000 ppm | 1 ‰ |
| Permille (‰) | Parts per million (ppm) |
|---|---|
| 1 ‰ | 1000 ppm |
| 2 ‰ | 2000 ppm |
| 3 ‰ | 3000 ppm |
| 5 ‰ | 5000 ppm |
| 10 ‰ | 10000 ppm |
| 20 ‰ | 20000 ppm |
| 25 ‰ | 25000 ppm |
| 50 ‰ | 50000 ppm |
| 75 ‰ | 75000 ppm |
| 100 ‰ | 100000 ppm |
| 250 ‰ | 250000 ppm |
| 500 ‰ | 500000 ppm |
| 1000 ‰ | 1000000 ppm |
Frequently asked questions
How do I convert parts per million to permille?
Divide the value in parts per million by 1000 to get the result in permille. For example, 5 ppm ÷ 1000 = 0.005 ‰.
How many permille are in 1 parts per million?
1 parts per million (ppm) is equal to 0.001 permille (‰).
How do I convert permille back to parts per million?
Use the inverse operation: multiply the value in permille by 1000 to get the result in parts per million.
How accurate is the parts per million to permille conversion?
The converter multiplies by the conversion factor 1000 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:
