Virtual Temperature Calculator
Adjust dry-bulb temperature for humidity effects
How to Use This Calculator
1
Enter Temperature
Dry-bulb temperature in °C.
2
Enter Pressure
Station pressure in hPa.
3
Enter Relative Humidity
Humidity percentage (0–100%).
Formula
w = 0.622 · e / (p − e), e = RH/100 · e_s(T)
T_v = T · (1 + 0.61 w)/(1 + w)
Note: T in Kelvin for the formula; outputs shown in °C.
About Virtual Temperature
Virtual temperature accounts for the lower density of moist air, enabling moist air to be treated like dry air at a higher equivalent temperature.
Frequently Asked Questions
How big is the correction?
A few Kelvin at typical conditions; larger in hot, humid air.
Does pressure matter?
Yes, it influences mixing ratio through the vapor pressure fraction.