PPM to Per Mille Calculator
Per mille (‰) shows up in European specifications and oceanography — seawater salinity is about 35‰, not 35,000 PPM, because the smaller number reads better. Divide PPM by 1,000 to get there.
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PPM to Per Mille Calculator
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Per mille (‰) shows up in European specifications and oceanography — seawater salinity is about 35‰, not 35,000 PPM, because the smaller number reads better. Divide PPM by 1,000 to get there.
How to use this calculator
- Enter the PPM value.
- Divide by 1,000.
- Read the per mille (‰) result.
The formula
Per mille is parts per thousand; PPM is parts per million — a factor of 1,000 apart.
What the units mean
PPM (parts per million) — one part of solute per million parts of the total mixture. The workhorse unit for trace concentrations in water, air, and food.
Per mille (‰) — parts per thousand. Common in European specifications and oceanography; seawater salinity is about 35‰.
Worked example
Seawater at 35,000 PPM → per mille: 35,000 ÷ 1,000 = 35‰.
Quick reference
| PPM | Per mille |
|---|---|
| 100 | 0.1‰ |
| 1,000 | 1‰ |
| 10,000 | 10‰ |
| 35,000 | 35‰ |
PPM ÷ 1,000 = ‰.
Where you will actually use this
Salinity, certain European product specs, and alcohol-related regulations sometimes use ‰ instead of PPM or percent.
- Seawater salinity reporting
- European specifications
- Beverage regulations
Mistakes that give wrong answers
- Confusing ‰ with %
- Dividing by 10,000 (that is PPM to percent)
Key takeaways
- Formula: Per mille (‰) = PPM ÷ 1,000
- Remember: PPM ÷ 1,000 = ‰.
- Watch out for: Confusing ‰ with %
- Next step: run your own numbers in the calculator above, then verify with a measurement — calculated values are only as good as the inputs.
Frequently asked questions
How do you convert PPM to per mille?
Divide PPM by 1,000.
What is 1,000 PPM in per mille?
1‰.
What is the per mille symbol?
‰ — distinct from the percent sign %.