Relative Humidity Calculator
Calculate relative humidity from air temperature and dew point.
Calculator
Result
About this calculator
Calculate relative humidity from air temperature and dew point.
Enter valid values, choose the units you need, then select Calculate. Results are computed in your browser.
How to use this calculator
What to enter
Enter or select the following as requested: Air temperature; Dew point. Follow the units, valid ranges, examples, and options displayed beside each field.
What the result means
The weather or atmospheric result is estimated from the entered temperature, pressure, humidity, wind, elevation, or rainfall values using the method assumed by the tool. Confirm units, reference conditions, and whether the formula is intended for the entered range.
When to use it
Use this for planning or educational estimates involving weather and atmospheric conditions. Do not use a calculator estimate as a substitute for official forecasts, aviation briefings, or severe-weather guidance.