Dew point and humidity calculator Dew point and humidity calculator

Dew point calculator

Helps assess condensation risks in rooms, storage and workshops.

The calculation uses a common Magnus approximation for typical temperature ranges.

Use the calculator to turn input values into a clear, repeatable result.
Keep units and assumptions visible so the calculation can be checked later.
Copy the result or key numbers for reports, messages or spreadsheets.
Reset to defaults when you want to compare another scenario from a clean state.
Calculators run in the browser and are useful for quick estimates before formal checks.
For finance, health, engineering or legal decisions, verify important results with a specialist or official source.