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Convert between period and frequency (f = 1/T), find frequency from wave speed and wavelength, and convert frequency to angular frequency (ω = 2πf).
Also covers: Period to frequency · Frequency to period · Angular frequency calculator · f = 1/T
f = 1 / T
The period T is the time for one full cycle.
Frequency (f)
50 Hz
In other units
Working
Choose the period (f = 1/T), wave speed and wavelength (f = v/λ), or angular frequency (ω = 2πf) and which variable to solve for; the form asks only for the others.
Each input has its own unit picker, so you can mix km, cm, µC or MHz without converting first.
You get the result in your chosen unit and every other unit, plus the rearranged equation with your numbers in SI units.
f = 1 / T. A period of 20 ms gives 1 / 0.02 s = 50 Hz, the mains frequency in Europe and much of the world.
The rate of change of phase, in radians per second: ω = 2πf. One full cycle is 2π radians, so 50 Hz is about 314.16 rad/s.
Yes. Frequency can be entered or shown in rpm (revolutions per minute), where 60 rpm = 1 Hz.
No. Every calculation runs in your browser.
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