// multi-utility computation suite · offline · instant · precise
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│ computation suite │
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auto.transmission-gear-speed Calculator
Calculates vehicle speed at a given engine RPM for any gear ratio and final drive, accounting for tyre diameter. Essential for choosing the right gear ratios when building a custom gearbox or evaluating final drive options.
Inputs
Gear Ratio
Reference formula or conversion factor shown for context.
Final Drive
Reference formula or conversion factor shown for context.
Tire Diameter In
Distance across a circle through its centre. Always confirm units match the rest of the calculation.
Rpm
Reference formula or conversion factor shown for context.
Results
vehicle speed (mph)
The computed rate of movement or processing.
speed (km/h)
The computed rate of movement or processing.
overall gear ratio
The proportional relationship between two quantities.
wheel RPM
Reference formula or conversion factor shown for context.
gear + final drive
Sample size or count used in the calculation.
RPM at 60mph (this gear)
pH of the solution. Below 7: acidic. 7: neutral. Above 7: basic (alkaline).