SMALL TOOLS. PRECISE CALCULATIONS.

Motor Torque Calculator

Practical calculators for motors and machinery.
Built for your workbench, and your phone.

Free to useNo installationEnglish / 한국어

TOOLS 01—04

Calculate motor shaft torque in N·m or lb·ft from power and RPM.

YOUR RESULT

Formula & how it works

These tools provide basic calculations under ideal conditions. Check manufacturer specifications and losses when applying results.

How to use

Korea uses kW and N·m; United States uses mechanical hp and lb·ft. Enter shaft power and RPM.

2 hp at 1,500 RPM → about 7.0028 lb·ft. Metric example: 1.5 kW at 1,500 RPM → about 9.5493 N·m.

Use mechanical shaft power rather than electrical input power. Starting torque, peak torque and gearbox losses require separate consideration.

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