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Percent to Parts-Per-Million Converter

Convert percent to parts-per-million: 1% is 10,000 ppm. Useful for water quality, air readings and any trace concentration quoted both ways.

How to use it

  • Enter percentage to calculate ppm.

Examples

1%10,000 ppm
0.2%2,000 ppm

Percent means parts per hundred; ppm means parts per million. To go from percent to ppm, multiply by 10,000 — the ratio between a million and a hundred. 1% × 10,000 = 10,000 ppm.

Where this comes up

  • Converting a chemical concentration given as a percentage into the ppm figure used in a safety data sheet
  • Expressing a very small percentage (like 0.001%) in the more readable ppm form
  • Chemistry, environmental science and manufacturing tolerance specifications
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Last updated 18 August 2026