Gear Calculator

Enter number of teeth for two gears and the module to calculate gear ratio, pitch diameters, center distance, and output RPM.

Gear A Teeth (N1 — Driver)

Gear B Teeth (N2 — Driven)

Module m (mm)

Input RPM (Gear A)

Gear Ratio (N2/N1)

: 1

Pitch Diameter A

—

Pitch Diameter B

—

Center Distance

—

Output RPM (Gear B)

—

Gear Design Formulas

Gear Ratio = N2 / N1

Pitch Diameter = m × N

Center Distance = m × (N1 + N2) / 2

Output RPM = Input RPM × N1 / N2

Belt/pulley systems.

Motor steps.

Rotational inertia.

Beam analysis.

Material stress.

Rotational speed.