basic

Carnot Engine Efficiency Calculator

η_Carnot = 1 − T_cold / T_hot (T in kelvin).

Compute the Carnot (theoretical maximum) efficiency of a heat engine operating between two thermal reservoirs from their temperatures: η_Carnot = 1 − T_cold / T_hot, with T in kelvin.

Dr. Helena Ortiz By Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

°C
°C

Results

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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

η_Carnot = 1 − T_cold / T_hot

In depth

Compute the Carnot (theoretical maximum) efficiency of a heat engine operating between two thermal reservoirs from their temperatures: η_Carnot = 1 − T_cold / T_hot, with T in kelvin.