Enter a frequency value and choose its frequency unit (Hz, kHz, MHz, etc.), then hit Calculate to find the corresponding period — the time it takes to complete one full cycle — displayed alongside the formula, unit, and cycles per second.
Result
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Unit
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Formula
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Cycles per Second
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Frequency and period are reciprocals of each other. The formula is F = 1/T, where F is frequency and T is period. If frequency increases, period decreases proportionally.
To convert frequency to period, use the formula T = 1/F. For example, if frequency is 50 Hz, the period is 1/50 = 0.02 seconds or 20 milliseconds.
You can use millihertz (mHz), hertz (Hz), kilohertz (kHz), megahertz (MHz), and gigahertz (GHz) for frequency. For period, use nanoseconds, microseconds, milliseconds, or seconds.
Standard electrical power frequency is 50 Hz in most countries and 60 Hz in North America. This means the period is 20 ms (50 Hz) or 16.67 ms (60 Hz).
Measure or identify the frequency of the signal wave, then use T = 1/F. For a 1 kHz signal, the period would be 1/1000 = 0.001 seconds or 1 millisecond.
Frequency (f) is measured in Hz and represents cycles per second. Angular frequency (ω) is measured in radians per second and equals 2πf. This calculator works with regular frequency in Hz.
Yes, RPM (revolutions per minute) can be converted to Hz by dividing by 60. For example, 3000 RPM equals 50 Hz, which has a period of 0.02 seconds per revolution.
When frequency doubles, the period is halved. This inverse relationship means high-frequency signals have very short periods, while low-frequency signals have longer periods.