Useful Tools / Dew Point Calculator

Dew Point Calculator

Calculate approximate dew point from temperature and relative humidity.

Example: condensation risk

At 24 °C and 55% relative humidity, the estimated dew point is approximately 14.4 °C. Surfaces colder than the dew point may collect condensation. The tool does not estimate mold growth or moisture transport through materials.

Related tools: HVAC BTU Calculator · Humidity Sensors · Humidity Transmitters

Formula and limitations

Magnus approximation: γ = ln(RH/100) + 17.625T/(243.04+T), Td = 243.04γ/(17.625−γ). Approximate at typical indoor conditions; condensation can occur on surfaces at or below dew point.

This tool provides educational estimates only. Verify design and safety requirements with a qualified professional.

Further reading: Reference source ↗. Explore other AirAlign Useful Tools.