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
As a fraction: 1/1000000
More converter tools
Readable results
Ranges, ± tolerances, feet/inches and clock durations work in the value field.
Unit picker
Export this result
1 ppm = 0.000001 1
Show this value in all 8 parts & percentages units
- Fractions 1 0.000 001
- Percents % 0.0001
- Per milles ‰ 0.001
- Per myriads ‱ 0.01
- Parts per millions ppm 1
- Parts per billions ppb 1000
- Parts per trillions ppt 1 000 000
- Parts per quadrillions ppq 1 000 000 000
Every row is Parts per million (ppm) converted through the fraction, in exact rational arithmetic.
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.