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Concentration

fractoppb

Convert fractions (dimensionless ratio) (frac) to parts per billion (10⁻⁹) (ppb).

Factor1 frac = 1e+9 ppb

Converter

frac

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

Result
1000ppb

Rendered to 6 significant figures.

Formula

Formula
ppb = frac × 1e+9

Multiply any value in fractions (dimensionless ratio) by 1e+9 to obtain the value in parts per billion (10⁻⁹).

Worked example

Convert 1e-6 frac to ppb.

  1. 01Start with 1e-6 frac.
  2. 02Multiply by the conversion factor: 1e-6 × 1e+9 = 1000 ppb.
Result1e-6 frac = 1000 ppb

Conversion table

fracppb
11e+9
22e+9
55e+9
101e+10
202e+10
505e+10
1001e+11
2002e+11
5005e+11
10001e+12

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from frac to ppb?
1 frac equals 1e+9 ppb. To convert, multiply the value in fractions (dimensionless ratio) by 1e+9.
How do I convert 1 frac to ppb?
1 frac = 1e+9 ppb. For any value, multiply by 1e+9.
How do I convert ppb back to frac?
Divide by the same factor — or equivalently, multiply by 1e-9. So 1 ppb = 1e-9 frac.
When would I need to convert fraction (dimensionless ratio) to parts per billion (10⁻⁹)?
Concentration-ratio conversions between frac and ppb 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 ppb are defined by exact SI relationships, so the displayed factor is exact (any rounding shown is only for display).

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