Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Thermodynamics
Otto Cycle Efficiency Calculator
Calculates the theoretical thermal efficiency of an Otto cycle engine from its compression ratio and fuel type. Use it when tuning or comparing spark-ignition engines to understand the thermodynamic upper limit of performance.
Fill in the required fields to see your result.
Thermodynamics
Carnot Cycle Efficiency Calculator
Find the theoretical maximum efficiency any heat engine can achieve between a hot and cold reservoir. Use this when designing or benchmarking steam turbines, engines, or any thermodynamic power cycle.
Fill in the required fields to see your result.
Key differences
| Otto Cycle Efficiency Calculator | Carnot Cycle Efficiency Calculator | |
|---|---|---|
| Category | Thermodynamics | Thermodynamics |
| Inputs required | 3 | 3 |
| Result | Otto Cycle Efficiency (%) | Carnot Efficiency (%) |
| What it does | Calculates the theoretical thermal efficiency of an Otto cycle engine from its compression ratio and fuel type. Use it when tuning or comparing spark-ignition engines to understand the thermodynamic upper limit of performance. | Find the theoretical maximum efficiency any heat engine can achieve between a hot and cold reservoir. Use this when designing or benchmarking steam turbines, engines, or any thermodynamic power cycle. |