Wet Bulb Calculator

Cooling Tower
Wet Bulb Calculator

Estimate ambient wet-bulb temperature from outdoor dry-bulb temperature and relative humidity.

1

Ambient Conditions

Use outdoor dry-bulb temperature and relative humidity.

°F
%
Estimate Wet Bulb Reset
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Formula

Wet bulb is estimated from dry-bulb temperature and relative humidity using an approximation formula.

This is a quick field estimate, not a replacement for a measured wet-bulb reading.

Assumptions

  • Dry-bulb temperature is entered in °F.
  • Relative humidity is entered as a percentage from 1 to 100.
  • The result is an estimated ambient wet-bulb value.

Warnings

  • This is an estimated value only.
  • For tower control, commissioning, or performance verification, use a measured wet-bulb reading when accuracy matters.
  • Input ranges far outside normal field conditions may be less reliable.