Convert parts per millions to fractions
1 ppm = 0.000001 1 — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
0.000 0011
Exact decimal: 0.000001
As a fraction: 1/1000000
1 ppm = 0.000001 1
How to convert parts per millions to fractions
Multiply the number of parts per millions by 0.000001 to get fractions.
The exact factor is 0.000001 — as a fraction, 1/1000000.
Parts per million to Fraction conversion table
| Parts per millions (ppm) | Fractions (1) |
|---|---|
| 1 ppm | 0.000 001 |
| 2 ppm | 0.000 002 |
| 3 ppm | 0.000 003 |
| 5 ppm | 0.000 005 |
| 10 ppm | 0.000 01 |
| 20 ppm | 0.000 02 |
| 25 ppm | 0.000 025 |
| 50 ppm | 0.000 05 |
| 100 ppm | 0.0001 |
| 250 ppm | 0.000 25 |
| 500 ppm | 0.0005 |
| 1000 ppm | 0.001 |
Fraction to Parts per million conversion table
| Fractions (1) | Parts per millions (ppm) |
|---|---|
| 1 1 | 1 000 000 |
| 2 1 | 2 000 000 |
| 3 1 | 3 000 000 |
| 5 1 | 5 000 000 |
| 10 1 | 10 000 000 |
| 20 1 | 20 000 000 |
| 25 1 | 25 000 000 |
| 50 1 | 50 000 000 |
| 100 1 | 100 000 000 |
| 250 1 | 250 000 000 |
| 500 1 | 500 000 000 |
| 1000 1 | 1 000 000 000 |
Frequently asked
How many fractions are in a parts per million?
One parts per million equals 0.000001 fractions (ppm → 1). That figure is exact, not rounded.
How do you convert parts per millions to fractions?
Multiply the number of parts per millions by 0.000001 to get fractions.
What is 1 1 in parts per millions?
One fraction is 1000000 parts per millions.
What is 10 ppm in 1?
10 ppm = 0.000 01 1.