Piston Engines - Compression Ratios

Cylinder volume and compression ratios in piston engines. Calculate the static compression ratio using piston displacement volume and clearance volume.

Calculator

Inputs

Piston Diameter (d) (cm)

Piston Stroke (s) (cm)

Clearance Volume (Vc) (cm³)

Results

Piston Displacement Volume (Vd)-- cm³

Total Volume (Vd + Vc)-- cm³

Compression Ratio (CR)--

Piston Diameter (cm)	Piston Stroke (cm)	Clearance Volume (cm³)	Displacement Volume (cm³)	Compression Ratio
5	8	30	157.08	6.24
6	10	40	282.74	8.07
7	10	50	384.85	8.7
8	10	50	502.65	11.05
8	12	60	603.19	11.06
9	12	70	763.41	11.91
10	12	80	942.48	12.78