Mean Piston Speed Calculator

Mean piston speed in m/s and ft/min from stroke and RPM — the key indicator of mechanical stress.

Formula

Mean piston speed = 2 × Stroke (mm) × Engine RPM / 60 000

Assumptions

Mean piston speed in m/s and ft/min from stroke and RPM — the key indicator of mechanical stress.

How to read it

Common benchmarks: production engines 15–20 m/s at redline, sports engines 20–25 m/s, racing beyond. A high figure means more stress on rods, rings and oil film — it is what limits maximum revs, not power.

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