CALCULATOR
PPB to PPM Converter
PPB to PPM. Example: Value in ppb: 2.5 gives 0.0025 ppm. Converts dimensionless proportions on the same stated basis: percent=one part per hundred, ppm=one part per million and ppb=one part per billion. Maximum input must additionally keep the actual fraction at or below one. No conversion between mass/volume/molar bases, mg/L, density or exposure advice is inferred.
How the calculation works
value × 1/1000
Worked example
With value in ppb 1 ppb, result in ppm is 0.001 ppm.
Assumptions and limits
Converts dimensionless proportions on the same stated basis: percent=one part per hundred, ppm=one part per million and ppb=one part per billion. Maximum input must additionally keep the actual fraction at or below one. No conversion between mass/volume/molar bases, mg/L, density or exposure advice is inferred.