| AH | calculate absolute humidity |
| C2K | Celsius to Kelvin conversion |
| Es.T0 | Saturation vapor pressure at absolute zero (hPa) |
| ivs | Viability of influenza A virus for 1 hour after spraying |
| ivt | Aerosol transmission efficiency of influenza A virus from guinea pigs to guinea pigs |
| K2C | Kelvin to Celsius conversion |
| L | Latent heat of water vapor |
| Md | Molecular weight of dry air |
| MR | calculate mixing ratio |
| Mw | Molecular weight of water vapor |
| RH | calculate relative humidity |
| Rw | Specific gas constant of water vapor |
| SH | calculate specific humidity |
| SH2RH | convert specific humidity into relative humidity |
| SVP | calculate saturation vapor pressure |
| SVP.ClaCla | calculate saturation vapor pressure using the Clausius-Clapeyron equation |
| SVP.Murray | calculate saturation vapor pressure using the Murray equation |
| T0 | Absolute zero |
| WVP1 | calculate partial water vapor pressure given dew point |
| WVP2 | calculate partial water vapor pressure given relative humidity and saturation water vapor pressure |