microgram per kilogram of dry air
Humidity ratioexact by definition
The microgram per kilogram of dry air is 10⁻⁹ kg/kg, one part per billion by mass. Semiconductor and analytical process gases are specified here, where a −80 °C dew point corresponds to roughly 340 μg/kg.
| 1 | 0.000001 |
One microgram per kilogram of dry air in every humidity ratio unit
| 1.60786 | part per billion by volume (moisture) (ppbv) | |
| 1 | microgram per kilogram of dry air (μg/kg)this unit | |
| 0.00160786 | part per million by volume (moisture) (ppmv) | |
| 0.001 | milligram per kilogram of dry air (mg/kg) | |
| 0.000007 | grain per pound of dry air (gr/lb) | |
| 0.000001 | gram per kilogram (g/kg) | |
| 1.00000e-09 | kilogram per kilogram (kg/kg) | |
| 1.00000e-09 | pound per pound of dry air (lb/lb) |
Solvers that use humidity ratio