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Carnot Efficiency Calculator
Maximum theoretical efficiency of a heat engine between a hot and cold temperature.
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Carnot efficiency
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Maximum theoretical efficiency of a heat engine between a hot and cold temperature.
Carnot Efficiency Estimator
Enter your numbers below for an instant estimate.
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💡 Tip: eta = 1 – Tc / Th, in kelvin.
How It Works
Key concepts behind this calculator
1
Enter Values
Fill in each field with your own numbers.
2
Calculate
Results update as you change the inputs.
3
Review
Read the breakdown and the explanation.
4
Adjust
Change values to compare scenarios.
Quick Reference Guide
Carnot Quick Guide
Typical values for reference.
| Hot C | Cold C | Hot C | Efficiency |
|---|---|---|---|
| 100 | 25 | 100 | 20.10% |
| 300 | 25 | 300 | 47.98% |
| 500 | 25 | 500 | 61.44% |
| 1000 | 25 | 1000 | 76.58% |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
Carnot Efficiency Calculator FAQ
Answers to common questions about this calculator.
The maximum efficiency any heat engine can reach between two temperatures.
Friction, heat loss and irreversibility.
eta = 1 – Tc / Th, in kelvin.
It is an estimate based on the inputs you enter. Check real quotes, labels or official guidance for important decisions.