Rotating Shafts - Torque

Calculate torsional moments or torque acting on rotating shafts. Torque is expressed as T = 63057 × Php / n, where Php is horsepower (hp) and n is revolution per minute (rpm). Results can be expressed in lb-in or Nm.

Calculator

Inputs

Results

Torque-- lb-in
Torque-- Nm

Formula

T = 63057 × Php / n

Where:

  • T = Torque or moment (lb-in)
  • Php = Horsepower (hp)
  • n = Revolution per minute (rpm)

Conversion Factors

  • 1 hp (English horsepower) = 745.7 W
  • 1 lb-in = 0.113 Nm