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Concentration

fractoppm

Convert fractions (dimensionless ratio) (frac) to parts per million (10⁻⁶) (ppm).

Factor1 frac = 1000000 ppm

Converter

frac

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

Result
1000ppm

Rendered to 6 significant figures.

Formula

Formula
ppm = frac × 1000000

Multiply any value in fractions (dimensionless ratio) by 1000000 to obtain the value in parts per million (10⁻⁶).

Worked example

Convert 0.001 frac to ppm.

  1. 01Start with 0.001 frac.
  2. 02Multiply by the conversion factor: 0.001 × 1000000 = 1000 ppm.
Result0.001 frac = 1000 ppm

Conversion table

fracppm
11.0000e+6
22.0000e+6
55.0000e+6
101e+7
202e+7
505e+7
1001e+8
2002e+8
5005e+8
10001e+9

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from frac to ppm?
1 frac equals 1000000 ppm. To convert, multiply the value in fractions (dimensionless ratio) by 1000000.
How do I convert 1 frac to ppm?
1 frac = 1.00000e+6 ppm. For any value, multiply by 1000000.
How do I convert ppm back to frac?
Divide by the same factor — or equivalently, multiply by 1e-6. So 1 ppm = 1e-6 frac.
When would I need to convert fraction (dimensionless ratio) to parts per million (10⁻⁶)?
Concentration-ratio conversions between frac 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 frac 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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