// multi-utility computation suite · offline · instant · precise
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│ [c] calcalyst_ │
│ computation suite │
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auto.engine-compression-ratio Calculator
Calculates an engine's compression ratio from bore, stroke, clearance volume, and head gasket volume, and indicates the minimum octane fuel required. Higher compression ratios extract more energy from fuel but demand higher octane to avoid knock.
Inputs
Bore Mm
Reference formula or conversion factor shown for context.
Stroke Mm
Reference formula or conversion factor shown for context.
Clearance Cc
Three-dimensional space occupied (m³ or L). 1 m³ = 1,000 L.
Head Gasket Cc
Three-dimensional space occupied (m³ or L). 1 m³ = 1,000 L.
Results
compression ratio
The computed compression ratio or compressive force. Higher compression ratios store more energy but increase heat and pressure.
swept volume (cc)
The computed three-dimensional volume.
clearance volume (cc)
The computed three-dimensional volume.
recommended fuel
Sample size or count used in the calculation.
thermal efficiency est.
Useful output divided by total input, as a percentage. True 100% efficiency is impossible — losses appear as heat. LEDs: 30–50%. Electric motors: 85–97%. Switching supplies: 85–95%.
CR = (Vs+Vc)/Vc
Reference formula or conversion factor shown for context.