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Concentration

%toppm

Convert percent (10⁻²) (%) to parts per million (10⁻⁶) (ppm).

Factor1 % = 10000 ppm

Converter

%

Accepts numbers or expressions, e.g. 150 + 14.7

Result
10000ppm

Rendered to 6 significant figures.

Formula

Formula
ppm = % × 10000

Multiply any value in percent (10⁻²) by 10000 to obtain the value in parts per million (10⁻⁶).

Worked example

Convert 1 % to ppm.

  1. 01Start with 1 %.
  2. 02Multiply by the conversion factor: 1 × 10000 = 10000 ppm.
Result1 % = 10000 ppm

Conversion table

%ppm
110000
220000
550000
101.0000e+5
202.0000e+5
505.0000e+5
1001.0000e+6
2002.0000e+6
5005.0000e+6
10001e+7

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from % to ppm?
1 % equals 10000 ppm. To convert, multiply the value in percent (10⁻²) by 10000.
How do I convert 1 % to ppm?
1 % = 10000 ppm. For any value, multiply by 10000.
How do I convert ppm back to %?
Divide by the same factor — or equivalently, multiply by 0.0001. So 1 ppm = 0.0001 %.
When would I need to convert percent (10⁻²) to parts per million (10⁻⁶)?
Concentration-ratio conversions between % and ppm are used in trace-analysis, gas-composition work, environmental reporting and process-chemistry datasheets. These conversions are dimensionless: they do NOT cover mg/L, g/L, mol/L, normality, equivalents, mass-percent, volume-percent, ppmw or ppmv — those require solution density and/or molecular weight. Note: ppt here means parts per trillion (10⁻¹²), not parts per thousand.
Is the conversion exact?
Yes. Both % and ppm are defined by exact SI relationships, so the displayed factor is exact (any rounding shown is only for display).

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