Humidity ratio converter

8 units, SI unit kg/kg. Every conversion runs through the SI base value, so round-trips are exact.

1 gr/lb = 0.14286 g/kg
One gram per kilogram in every unit
part per billion by volume (moisture) (ppbv)1,607,859.2 ppbv
microgram per kilogram of dry air (μg/kg)1,000,000 μg/kg
part per million by volume (moisture) (ppmv)1,607.8592 ppmv
milligram per kilogram of dry air (mg/kg)1,000 mg/kg
grain per pound of dry air (gr/lb)7 gr/lb
gram per kilogram (g/kg)1 g/kg
kilogram per kilogram (kg/kg)0.001 kg/kg
pound per pound of dry air (lb/lb)0.001 lb/lb