Compression Ratio Calculator

Professional Engine Tuning Tool by calczen.com

Engine Parameters

Cylinder Bore (in)

Stroke Length (in)

Cylinder Head Vol (cc)

Piston Deck Ht (in)

Piston Vol (cc)

Positive for dish, negative for dome

Gasket Thickness (in)

Gasket Bore (in)

Waiting for calculations...

01 $V_{cylinder} = \pi \times r^2 \times S$

02 $V_{clearance} = V_{head} + V_{deck} + V_{gasket} + V_{piston}$

03 $CR = (V_{cyl} + V_{clear}) / V_{clear}$