Online Duty Cycle Calculator for PWM signals

01/08/2026

Duty Cycle Calculator is an easy-to-use online engineering tool to help you determine the duty cycle and other pulse parameters. The duty cycle shows what part of the period the pulse width is.This calculator uses the following equation to determine the duty cycle:

D = (tH / T) × 100%

where: D – duty cycle, tH – pulse width, T – period.