Use this chemistry calculator to reproduce a named relationship with explicit quantities and units for study, laboratory planning, or an independent numerical check.

Air temperature (°C)

Required number input.

Relative humidity (%)

Required number input.

Approximate wet bulb temperature from air temperature and relative humidity using the Stull formula. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Wet bulb temperature (°C)

The resulting wet bulb temperature returned as a number.

• Humidity and wet-bulb relationships depend on pressure, temperature scales, phase conventions, ventilation, and the selected saturation-vapor-pressure correlation. Local measurements and full psychrometric methods are needed for precision work.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check units and significant figures, compare the result with limiting cases, and use measured or source-specific constants where available. Laboratory, safety, and regulatory decisions require validated methods and appropriate uncertainty analysis.

• Barometric Pressure

  Estimate atmospheric pressure at altitude from temperature using the barometric formula.

• Dewpoint From Vapor Pressure

  Invert the Magnus formula to compute dewpoint temperature from water vapor pressure.

• Molar Mass From Vapor Density Air Calculator

  Estimate molar mass from vapor density relative to air using M = 28.96 × VD(air).