Carnot Efficiency Calculator
Calculate the ideal efficiency between two thermal reservoirs.
How to Use This Calculator
1
Enter Th in kelvin
Hot reservoir absolute temperature.
2
Enter Tc in kelvin
Cold reservoir absolute temperature.
3
Calculate efficiency
Click Calculate to get η. Real engines are always less efficient.
Formula
η = 1 − Tc / Th
Example: Th=600 K, Tc=300 K → η = 0.5 (50%)
About Carnot Efficiency
Carnot efficiency is the theoretical upper bound for any heat engine operating between two temperatures.
- Benchmarking engine performance
- Thermodynamic cycle analysis
Frequently Asked Questions
Can η be 100%?
Only if Tc = 0 K, which is unattainable. Real η is always lower.
Can I use °C?
Convert to K by adding 273.15; the ratio requires absolute temperatures.