Convert parts per millions to per milles

1 ppm = 0.001 ‰ — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.

0.001
✓ Exact 1 ppm = 0.001 ‰
As a fraction: 1/1000
1 ppm = 0.001 ‰

How to convert parts per millions to per milles

Multiply the number of parts per millions by 0.001 to get per milles.

The exact factor is 0.001 — as a fraction, 1/1000.

Parts per million to Per mille conversion table

Parts per millions (ppm) Per milles (‰)
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
100 ppm 0.1
250 ppm 0.25
500 ppm 0.5
1000 ppm 1

Per mille to Parts per million conversion table

Per milles (‰) Parts per millions (ppm)
1 ‰ 1000
2 ‰ 2000
3 ‰ 3000
5 ‰ 5000
10 ‰ 10 000
20 ‰ 20 000
25 ‰ 25 000
50 ‰ 50 000
100 ‰ 100 000
250 ‰ 250 000
500 ‰ 500 000
1000 ‰ 1 000 000

Frequently asked

How many per milles are in a parts per million?

One parts per million equals 0.001 per milles (ppm → ‰). That figure is exact, not rounded.

How do you convert parts per millions to per milles?

Multiply the number of parts per millions by 0.001 to get per milles.

What is 1 ‰ in parts per millions?

One per mille is 1000 parts per millions.

What is 10 ppm in ‰?

10 ppm = 0.01 ‰.

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