MAXScanner calculator widget

Gear Ratio RPM Calculator — Speed, Cruise RPM & Overall Ratio

Editable live calculator

Change any input — the result updates immediately

No hidden assumptions. Inputs, units and the working stay visible so you can check the calculation.

Solve for Engine RPM Road speed (mph) Transmission gear ratio Final drive ratio Loaded tire diameter (in)

Calculated result

82.79 mph

Transmission × final drive = 2.84:1

Speed at 1,000 RPM with entered gearing: 33.12 mph

Theoretical only: tire growth, converter/clutch slip, wheelspin and aerodynamic limits are excluded.

Show the working

Shared links reopen these inputs; saved calculations stay in this browser unless you clear site data.