Period from Frequency

T = 1 / f

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Result
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Formula

T = 1 / f

Description

The period of a periodic signal is the time for one complete cycle, the reciprocal of its frequency. It is the most basic timing relationship in electronics, converting between how often something happens (frequency) and how long each cycle takes (period). Oscilloscopes measure period directly; converting gives frequency and vice versa.

Variables

  • T — Period of one cycle (s)
  • f — Frequency (Hz)

Practical Notes

1 kHz corresponds to 1 ms; 1 MHz to 1 µs. The period sets timing budgets for clocks, PWM, and sampling.

Related Concepts

All Basic Electronics formulas →
Ohm's Law Electrical Power Voltage Divider Current Divider Thévenin Equivalent Norton Equivalent Temperature Coefficient of Resistance Kirchhoff's Voltage Law (KVL)

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