Frequency to Period Calculator

About this calculator

This calculator applies the inverse relationship T = 1/f, where period (T, in seconds) is the time for one complete wave cycle and frequency (f, in Hertz) is how many cycles occur per second — doubling the frequency always halves the period, and vice versa. It works across any oscillating signal, from AC electrical current at 50 or 60 Hz to a microprocessor clock running at gigahertz speeds.

Electrical engineers checking a circuit's timing, programmers setting up a timer or PWM signal that's specified in Hertz but needs to be coded in milliseconds, and physics students converting between the two units in wave problems all use this same formula.