Compression Ratio Calculator
Static CR from bore, stroke, and chamber volume.
Inputs
Results
Static compression ratio
10.23
Effective CR (est.)
7.92
Swept vol/cyl (cc)716.6
Clearance volume (cc)77.7
Gasket volume (cc)8.65
Total displacement (cc)5,733
Total displacement (ci)349.8
Total displacement (L)5.73
Recommended Octane91 (Premium)
How to Use This Calculator
- Enter Bore (inches), Stroke (inches), and Number of cylinders.
- Set Chamber volume (cc), Gasket bore (inches), and Gasket thickness (inches).
- Adjust Piston dome/dish (cc) as needed.
- Review Static compression ratio and Effective CR (est.).
- Use Swept vol/cyl (cc) and Clearance volume (cc) to inform your decision.
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