// multi-utility computation suite · offline · instant · precise
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│ computation suite │
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eng.gear-ratio Calculator
Calculates gear ratio, output RPM, output torque, and mechanical advantage from driver and driven gear tooth counts and input power. Gear ratio above 5:1 in a single stage causes high contact stress — compound gearboxes split the ratio across multiple stages.
Inputs
Teeth Drive
Reference formula or conversion factor shown for context.
Teeth Driven
Reference formula or conversion factor shown for context.
Rpm In
Reference formula or conversion factor shown for context.
Torque In
Rotational force (N·m) = force × perpendicular lever arm. Engine torque peaks at lower RPM; horsepower peaks higher.
Results
gear ratio
The proportional relationship between two quantities.
output RPM
Reference formula or conversion factor shown for context.
output torque
Rotational force (N·m) = force × perpendicular lever arm. High torque at low RPM is ideal for hauling; high RPM suits high-speed applications.
efficiency
Useful output divided by total input, as a percentage. True 100% efficiency is impossible — losses appear as heat. LEDs: 30–50%. Electric motors: 85–97%. Switching supplies: 85–95%.