Gear Ratio Calculator

Find gear ratios and their effects on speed and torque.

CALCULATE

Formulas

Ratio = N_driven / N_drive

Ratio > 1: speed reduction, torque increase. Ratio < 1: speed increase, torque reduction.

Gear Ratios

A 3:1 ratio triples torque but reduces speed to 1/3. Bicycle gears: 0.6-4.0. Car 1st gear: ~3.5. Car 5th gear: ~0.8. Used in transmissions, clocks, robotics.

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