How do I convert period to frequency?

Frequency is one divided by period. A 20 ms period is 50 Hz.

How many Hz are in 3000 RPM?

3000 revolutions per minute equals 50 Hz, because 3000 divided by 60 is 50.

What is the difference between frequency and angular frequency?

Frequency counts cycles per second. Angular frequency tracks phase in radians per second and equals 2 pi times frequency.

Frequency Calculator

Calculate frequency from period, wavelength and wave speed, cycle count over time, RPM or angular frequency.

Frequency calculation

Known value

Period

Frequency from period, waves or rotations

English frequency calculator intent combines several common routes to hertz: period, wave speed and wavelength, counted cycles over time, RPM and angular frequency.

f = \frac{1}{T}

T is the period of one cycle.

f = \frac{v}{λ}

v is wave speed and lambda is wavelength.

f = \frac{R P M}{60}

Rotational speed in revolutions per minute converts to cycles per second.

ω = 2 π f

omega is angular frequency in radians per second.

Calculator boundary

Calculation, not measurement

This page calculates from numbers you enter. It does not listen to audio, analyze a signal or replace an oscilloscope, spectrum analyzer or frequency counter.

Frequently Asked Questions

Sources and References

Calculations are based on the listed reference sources. Links open in a new tab.

Updated: June 2, 2026

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