Humidity calculations and conversions made easy – online, offline and on the go

The free Vaisala Humidity Calculator allows you to calculate several humidity parameters from one known value. Make unit conversions on the fly, and see the effects of changing ambient conditions, like temperature and pressure. Humidity Calculator makes complex manual calculations and conversions a thing of the past.

The tool includes calculation and conversion for: * relative humidity, * dew point / frost point, * absolute humidity, * water content, * mixing ratio, * vapor pressure, * parts per million, * wet bulb temperature, * enthalpy, * specific volume, * density.

The new user interface works with any device, PC or mobile, and online and offline.

Eight languages are available: * English, * Chinese, * Dutch, * Finnish, * French, * German, * Japanese and * Portuguese.
​Register to start the Vaisala Humidity Calculator 5.0.

  • Updated user interface – optimized also for mobile devices.
  • Works on any operating system with modern browser support - tested with IE9+, Chrome, Firefox, and Safari. Also tested with Android, iOS and Windows mobile devices.
  • No more installing software for offline use - just bookmark the calculator page or add it to the home screen on your mobile device.

Humidity Calculator