Enter the current temperature and relative humidity. The calculator will evaluate and display the estimated wet bulb temperature at those conditions.

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## Wet Bulb Formula

The following formula is used to calculate the wet-bulb temperature.

Tw = T * arctan[0.152 * (rh + 8.3136)^(1/2)] + arctan(T + rh%) – arctan(rh – 1.6763) + 0.00391838 *(rh)^(3/2) * arctan(0.0231 * rh) – 4.686

- Where TW is the wet-bulb temperature
- T is the current temperature
- rh is the relative humidity (%)

How to calculate wet bulb temperature

**First, determine the current temperature**Measure the current temperature using a thermometer.

**Next, determine the current relative humidity**This humidity is measure as a %

**Finally, calculate the wet bulb**Using the current temperature and the humidity, calculate the wet-bulb temperature.

## FAQ

**What is wet bulb?**

The wet bulb is the lowest temperature air can reach through only evaporation.