Humidity calculations and conversions made easy – online, offline and on the go Humidity Calculator makes complex manual calculations and conversions a thing of the past. Register to start the Vaisala Humidity Calculator 5.0 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. 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 on any operating system with modern browser support - tested with IE9+, Chrome, Firefox, and Safari. Also tested with Android, iOS and Windows mobile devices. Eight languages are available: English Chinese Dutch Finnish French German Japanese Portuguese No more installing software for offline use - just bookmark the calculator page or add it to the home screen on your mobile device. Email Address*Country*--Please Select--United StatesUnited KingdomCanadaChinaIndiaJapanAustraliaBrazilFranceGermanyFinland--------------AfghanistanÅland IslandsAlbaniaAlgeriaAmerican SamoaAndorraAngolaAnguillaAntarcticaAntigua and BarbudaArgentinaArmeniaArubaAustraliaAustriaAzerbaijanBahamasBahrainBangladeshBarbadosBelarusBelgiumBelizeBeninBermudaBhutanBoliviaBosnia and HerzegovinaBotswanaBouvet IslandBrazilBrit/Indian Ocean Terr.Brunei DarussalamBulgariaBurkina FasoBurundiCambodiaCameroonCanadaCape VerdeCayman IslandsCentral African RepublicChadChileChinaChristmas IslandCocos (Keeling) IslandsColombiaComorosCongoCongo, The Dem. Republic OfCook IslandsCosta RicaCôte D'IvoireCroatiaCubaCyprusCzech RepublicDenmarkDjiboutiDominicaDominican RepublicEcuadorEgyptEl SalvadorEquatorial GuineaEritreaEstoniaEthiopiaFalkland IslandsFaroe IslandsFijiFinlandFranceFrench GuianaFrench PolynesiaFrench Southern Terr.GabonGambiaGeorgiaGermanyGhanaGibraltarUnited KingdomGreeceGreenlandGrenadaGuadeloupeGuamGuatemalaGuineaGuinea-BissauGuyanaHaitiHeard/McDonald Isls.HondurasHong KongHungaryIcelandIndiaIndonesiaIranIraqIrelandIsraelItalyJamaicaJapanJordanKazakhstanKenyaKiribatiKorea (North)Korea (South)KuwaitKyrgyzstanLaosLatviaLebanonLesothoLiberiaLibyaLiechtensteinLithuaniaLuxembourgMacauMacedoniaMadagascarMalawiMalaysiaMaldivesMaliMaltaMarshall IslandsMartiniqueMauritaniaMauritiusMayotteMexicoMicronesiaMoldovaMonacoMongoliaMontenegroMontserratMoroccoMozambiqueMyanmarN. Mariana Isls.NamibiaNauruNepalNetherlandsNetherlands AntillesNew CaledoniaNew ZealandNicaraguaNigerNigeriaNiueNorfolk IslandNorwayOmanPakistanPalauPalestinian Territory, OccupiedPanamaPapua New GuineaParaguayPeruPhilippinesPitcairnPolandPortugalPuerto RicoQatarReunionRomaniaRussian FederationRwandaSaint Kitts and NevisSaint LuciaSamoaSan MarinoSao Tome/PrincipeSaudi ArabiaSenegalSerbiaSeychellesSierra LeoneSingaporeSlovak RepublicSloveniaSolomon IslandsSomaliaSouth AfricaSpainSri LankaSt. HelenaSt. Pierre and MiquelonSt. Vincent and GrenadinesSudanSurinameSvalbard/Jan Mayen Isls.SwazilandSwedenSwitzerlandSyriaTaiwanTajikistanTanzaniaThailandTimor-LesteTogoTokelauTongaTrinidad and TobagoTunisiaTurkeyTurkmenistanTurks/Caicos Isls.TuvaluUgandaUkraineUnited Arab EmiratesUnited StatesUS Minor Outlying Is.UruguayUzbekistanVanuatuVatican CityVenezuelaViet NamVirgin Islands (British)Virgin Islands (U.S.)Wallis/Futuna Isls.Western SaharaYemenZambiaZimbabweState or Province*--Please Select--Other - not US or CAAlaskaAlabamaArkansasArizonaCaliforniaColoradoConnecticutD.C.DelawareFloridaMicronesiaGeorgiaHawaiiIowaIdahoIllinoisIndianaKansasKentuckyLouisianaMassachusettsMarylandMaineMichiganMinnesotaMissouriMarianasMississippiMontanaNorth CarolinaNorth DakotaNebraskaNew HampshireNew JerseyNew MexicoNevadaNew YorkOhioOklahomaOregonPennsylvaniaRhode IslandSouth CarolinaSouth DakotaTennesseeTexasUtahVirginiaVermontWashingtonWisconsinWest VirginiaWyomingAlbertaManitobaBritish ColumbiaNew BrunswickNewfoundland and LabradorNova ScotiaNorthwest TerritoriesNunavutOntarioPrince Edward IslandQuebecSaskatchewanYukon TerritoryFirst Name*Last Name*Company*TitleBusiness PhoneInterest Area*-- Please Select --AgrometeorologyAirplane Weather SafetyAirport WeatherAmbient or High Humidity ProcessesAtmospheric and Meteorological ResearchAutomotive Manufacturing ProcessesBallistic, Naval and Tactical WeatherBiogas ProductionBio-Decontamination ProcessesCompressed AirConcrete and ConstructionFood and Beverage ProcessesGas Turbines and Combustion EnginesGreenhouses and Indoor AgricultureHVAC & Indoor Air QualityHydrologyIndustrial Research Laboratories and FacilitiesLife Science Laboratories and FacilitiesLife Science EquipmentLiquid ConcentrationLow Humidity Processes (under 10% RH)Lubrication and Hydraulic SystemsMuseums, Archives and LibrariesOff-Shore and Ship Weather MeasurementOn-Shore Harbour WeatherOperational Weather Observations and ForecastingOther Industrial MeasurementOther Weather or Environmental MeasurementOutdoor Air QualityPower TransmissionRail WeatherRenewable Weather Energy DevelopmentRenewable Weather Energy OperationRoad WeatherUrban MeteorologyWarehouses and Cargo ContainersWind Turbine ManufacturingI authorize Vaisala to send me information about relevant products and services. By submitting this form you acknowledge Vaisala’s Privacy Policy You can manage your preferences here Version history of the PC application Version 3.1 2014-02-08 Fixed a bug in the pressure unit (psig) conversion. New rounding function to improve calculation accuracy at extreme conditions. Minor user interface improvements. Version 3.0 2013-08-27 Entirely new calculation engine. New calculated parameters: enthalpy, specific volume, density. Replaced Basic and Advanced tabs with a customizable user interface. End user can now decide which measurement parameters are shown on the screen Version 2.2 2009-11-23 Fixed a calculation bug related to user changing both ambient conditions (T, P) at the same time. Now re-calculation happens immediately after condition has been changed. Fixed a bug in language negotiation that resulted in "Locale not found" errors in some localization combinations. New Vaisala visuals. Version 2.1 2008-04-23 Fixed a calculation bug related to user changing ambient conditions (T, P). Now all values are calculated based on new ambient conditions. Version 2.0 2008-04-08 Wet-bulb calculation added. User can insert custom psychrometer coefficients. All values are calculated after changes in ambient conditions (T, P, gas type). Maximum ambient temperature increased to +373 °C (+703 °F). Portuguese localization added. Version 1.3 2007-06-28 Fixed a bug in pressure unit conversion when converting to or from mmHg/Torr. Version 1.2 2007-04-05 Improved accuracy of vapor pressure calculation in high temperatures. Version 1.1.1 2007-02-01 Fixed a calculation bug related to using custom gases. Version 1.1 2007-01-15 Comma can be used as decimal separator in addition to full stop. Improved calculation formula for natural gas in high pressures (above 40 bar). Print button introduced. Use to print the whole calculator screen. Copy values button introduced. Use to copy/paste calculated values to other programs, e.g. Microsoft Excel. Switching from Basic to Advanced mode does not reset the calculation. Input error messages are displayed in selected units. E.g. Temperature in Celsius or Fahrenheit.
Humidity calculations and conversions made easy – online, offline and on the go Humidity Calculator makes complex manual calculations and conversions a thing of the past.
Register to start the Vaisala Humidity Calculator 5.0 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. 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 on any operating system with modern browser support - tested with IE9+, Chrome, Firefox, and Safari. Also tested with Android, iOS and Windows mobile devices. Eight languages are available: English Chinese Dutch Finnish French German Japanese Portuguese No more installing software for offline use - just bookmark the calculator page or add it to the home screen on your mobile device. Email Address*Country*--Please Select--United StatesUnited KingdomCanadaChinaIndiaJapanAustraliaBrazilFranceGermanyFinland--------------AfghanistanÅland IslandsAlbaniaAlgeriaAmerican SamoaAndorraAngolaAnguillaAntarcticaAntigua and BarbudaArgentinaArmeniaArubaAustraliaAustriaAzerbaijanBahamasBahrainBangladeshBarbadosBelarusBelgiumBelizeBeninBermudaBhutanBoliviaBosnia and HerzegovinaBotswanaBouvet IslandBrazilBrit/Indian Ocean Terr.Brunei DarussalamBulgariaBurkina FasoBurundiCambodiaCameroonCanadaCape VerdeCayman IslandsCentral African RepublicChadChileChinaChristmas IslandCocos (Keeling) IslandsColombiaComorosCongoCongo, The Dem. Republic OfCook IslandsCosta RicaCôte D'IvoireCroatiaCubaCyprusCzech RepublicDenmarkDjiboutiDominicaDominican RepublicEcuadorEgyptEl SalvadorEquatorial GuineaEritreaEstoniaEthiopiaFalkland IslandsFaroe IslandsFijiFinlandFranceFrench GuianaFrench PolynesiaFrench Southern Terr.GabonGambiaGeorgiaGermanyGhanaGibraltarUnited KingdomGreeceGreenlandGrenadaGuadeloupeGuamGuatemalaGuineaGuinea-BissauGuyanaHaitiHeard/McDonald Isls.HondurasHong KongHungaryIcelandIndiaIndonesiaIranIraqIrelandIsraelItalyJamaicaJapanJordanKazakhstanKenyaKiribatiKorea (North)Korea (South)KuwaitKyrgyzstanLaosLatviaLebanonLesothoLiberiaLibyaLiechtensteinLithuaniaLuxembourgMacauMacedoniaMadagascarMalawiMalaysiaMaldivesMaliMaltaMarshall IslandsMartiniqueMauritaniaMauritiusMayotteMexicoMicronesiaMoldovaMonacoMongoliaMontenegroMontserratMoroccoMozambiqueMyanmarN. Mariana Isls.NamibiaNauruNepalNetherlandsNetherlands AntillesNew CaledoniaNew ZealandNicaraguaNigerNigeriaNiueNorfolk IslandNorwayOmanPakistanPalauPalestinian Territory, OccupiedPanamaPapua New GuineaParaguayPeruPhilippinesPitcairnPolandPortugalPuerto RicoQatarReunionRomaniaRussian FederationRwandaSaint Kitts and NevisSaint LuciaSamoaSan MarinoSao Tome/PrincipeSaudi ArabiaSenegalSerbiaSeychellesSierra LeoneSingaporeSlovak RepublicSloveniaSolomon IslandsSomaliaSouth AfricaSpainSri LankaSt. HelenaSt. Pierre and MiquelonSt. Vincent and GrenadinesSudanSurinameSvalbard/Jan Mayen Isls.SwazilandSwedenSwitzerlandSyriaTaiwanTajikistanTanzaniaThailandTimor-LesteTogoTokelauTongaTrinidad and TobagoTunisiaTurkeyTurkmenistanTurks/Caicos Isls.TuvaluUgandaUkraineUnited Arab EmiratesUnited StatesUS Minor Outlying Is.UruguayUzbekistanVanuatuVatican CityVenezuelaViet NamVirgin Islands (British)Virgin Islands (U.S.)Wallis/Futuna Isls.Western SaharaYemenZambiaZimbabweState or Province*--Please Select--Other - not US or CAAlaskaAlabamaArkansasArizonaCaliforniaColoradoConnecticutD.C.DelawareFloridaMicronesiaGeorgiaHawaiiIowaIdahoIllinoisIndianaKansasKentuckyLouisianaMassachusettsMarylandMaineMichiganMinnesotaMissouriMarianasMississippiMontanaNorth CarolinaNorth DakotaNebraskaNew HampshireNew JerseyNew MexicoNevadaNew YorkOhioOklahomaOregonPennsylvaniaRhode IslandSouth CarolinaSouth DakotaTennesseeTexasUtahVirginiaVermontWashingtonWisconsinWest VirginiaWyomingAlbertaManitobaBritish ColumbiaNew BrunswickNewfoundland and LabradorNova ScotiaNorthwest TerritoriesNunavutOntarioPrince Edward IslandQuebecSaskatchewanYukon TerritoryFirst Name*Last Name*Company*TitleBusiness PhoneInterest Area*-- Please Select --AgrometeorologyAirplane Weather SafetyAirport WeatherAmbient or High Humidity ProcessesAtmospheric and Meteorological ResearchAutomotive Manufacturing ProcessesBallistic, Naval and Tactical WeatherBiogas ProductionBio-Decontamination ProcessesCompressed AirConcrete and ConstructionFood and Beverage ProcessesGas Turbines and Combustion EnginesGreenhouses and Indoor AgricultureHVAC & Indoor Air QualityHydrologyIndustrial Research Laboratories and FacilitiesLife Science Laboratories and FacilitiesLife Science EquipmentLiquid ConcentrationLow Humidity Processes (under 10% RH)Lubrication and Hydraulic SystemsMuseums, Archives and LibrariesOff-Shore and Ship Weather MeasurementOn-Shore Harbour WeatherOperational Weather Observations and ForecastingOther Industrial MeasurementOther Weather or Environmental MeasurementOutdoor Air QualityPower TransmissionRail WeatherRenewable Weather Energy DevelopmentRenewable Weather Energy OperationRoad WeatherUrban MeteorologyWarehouses and Cargo ContainersWind Turbine ManufacturingI authorize Vaisala to send me information about relevant products and services. By submitting this form you acknowledge Vaisala’s Privacy Policy You can manage your preferences here
Version history of the PC application Version 3.1 2014-02-08 Fixed a bug in the pressure unit (psig) conversion. New rounding function to improve calculation accuracy at extreme conditions. Minor user interface improvements. Version 3.0 2013-08-27 Entirely new calculation engine. New calculated parameters: enthalpy, specific volume, density. Replaced Basic and Advanced tabs with a customizable user interface. End user can now decide which measurement parameters are shown on the screen Version 2.2 2009-11-23 Fixed a calculation bug related to user changing both ambient conditions (T, P) at the same time. Now re-calculation happens immediately after condition has been changed. Fixed a bug in language negotiation that resulted in "Locale not found" errors in some localization combinations. New Vaisala visuals. Version 2.1 2008-04-23 Fixed a calculation bug related to user changing ambient conditions (T, P). Now all values are calculated based on new ambient conditions. Version 2.0 2008-04-08 Wet-bulb calculation added. User can insert custom psychrometer coefficients. All values are calculated after changes in ambient conditions (T, P, gas type). Maximum ambient temperature increased to +373 °C (+703 °F). Portuguese localization added. Version 1.3 2007-06-28 Fixed a bug in pressure unit conversion when converting to or from mmHg/Torr. Version 1.2 2007-04-05 Improved accuracy of vapor pressure calculation in high temperatures. Version 1.1.1 2007-02-01 Fixed a calculation bug related to using custom gases. Version 1.1 2007-01-15 Comma can be used as decimal separator in addition to full stop. Improved calculation formula for natural gas in high pressures (above 40 bar). Print button introduced. Use to print the whole calculator screen. Copy values button introduced. Use to copy/paste calculated values to other programs, e.g. Microsoft Excel. Switching from Basic to Advanced mode does not reset the calculation. Input error messages are displayed in selected units. E.g. Temperature in Celsius or Fahrenheit.
Version 3.1 2014-02-08 Fixed a bug in the pressure unit (psig) conversion. New rounding function to improve calculation accuracy at extreme conditions. Minor user interface improvements.
Version 3.0 2013-08-27 Entirely new calculation engine. New calculated parameters: enthalpy, specific volume, density. Replaced Basic and Advanced tabs with a customizable user interface. End user can now decide which measurement parameters are shown on the screen
Version 2.2 2009-11-23 Fixed a calculation bug related to user changing both ambient conditions (T, P) at the same time. Now re-calculation happens immediately after condition has been changed. Fixed a bug in language negotiation that resulted in "Locale not found" errors in some localization combinations. New Vaisala visuals.
Version 2.1 2008-04-23 Fixed a calculation bug related to user changing ambient conditions (T, P). Now all values are calculated based on new ambient conditions.
Version 2.0 2008-04-08 Wet-bulb calculation added. User can insert custom psychrometer coefficients. All values are calculated after changes in ambient conditions (T, P, gas type). Maximum ambient temperature increased to +373 °C (+703 °F). Portuguese localization added.
Version 1.1 2007-01-15 Comma can be used as decimal separator in addition to full stop. Improved calculation formula for natural gas in high pressures (above 40 bar). Print button introduced. Use to print the whole calculator screen. Copy values button introduced. Use to copy/paste calculated values to other programs, e.g. Microsoft Excel. Switching from Basic to Advanced mode does not reset the calculation. Input error messages are displayed in selected units. E.g. Temperature in Celsius or Fahrenheit.
