Science & Environment
Evaporative Cooler Effectiveness Calculator
Estimate evaporative (swamp) cooler leaving air temperature and effectiveness from wet-bulb depression.
Your inputs
Change any value to update the result instantly.
Leaving air temperature
25.2 °C
Wet-bulb depression
16 °C
Temperature drop achieved
12.8 °C
Effectiveness
80 %
Formula and working
Tleaving = Tdry − ε(Tdry − Twet)
- 1
Collect the inputs
Dry-bulb temperature = 38 °C; Wet-bulb temperature = 22 °C; Cooler effectiveness = 80 %
- 2
Apply the formula
Tleaving = Tdry − ε(Tdry − Twet)
- 3
Result
Leaving air temperature = 25.2 °C
Frequently asked questions
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
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