Compression Ratio Calculator
Estimate static compression ratio from chamber and deck geometry values.
Inputs
Results
Run a calculation to view results.
Example Values
- 4.0 bore x 4.0 stroke, 70cc chamber
Formula and Notes
CR = (Swept Volume + Clearance Volume) / Clearance Volume; Clearance = chamber + piston + deck + gasket
Compression ratio is an estimate. Always verify with manufacturer specifications.
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Diesel Toolkit provides estimated calculations only and does not replace OEM service information, engineering specs, or manufacturer procedures.