Dew Point Calculator

Enter temperature and relative humidity to estimate dew point, vapor pressure, and absolute humidity locally.

Air temperature

Unit

Relative humidity (%)

—Dew point

—Actual vapor pressure

—Saturation vapor pressure

—Absolute humidity

Weather calculations run locally in your browser. These tools transform observations with stated formulas; they do not replace official forecasts, alerts, measurements, or professional field instruments.

How to use this Dew Point Calculator

Calculate dew point from air temperature and relative humidity using a Magnus approximation. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.