This pump temperature rise calculator estimates how much the pumped fluid heats up from inefficiency, based on the head and pump efficiency. Enter the values above.
Formula (water)
ΔT = g × H × (1 − η) ÷ (η × cp)
- H — head (m), η — efficiency, cp ≈ 4187 J/kg·K
Example
H = 50 m, η = 0.7: ΔT = 9.81 × 50 × 0.3 ÷ (0.7 × 4187) = 0.05 °C.
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Frequently Asked Questions
How do I calculate pump temperature rise?
Multiply g by head and (1 minus efficiency), then divide by efficiency times the fluid’s specific heat.
Why does a pump heat the fluid?
Inefficiency turns some input power into heat, which the fluid carries away — critical at low or no flow.
When does temperature rise matter?
At minimum or shut-off flow, where little fluid carries the heat, risking overheating and vapor lock.