How this calculator works
A cycle contains one revolution, 360 degrees or 2 pi radians. The converter first turns the entered rate into cycles per second, then applies the target scale. SI prefixes are decimal, with case distinguishing millihertz from megahertz. The period is the elapsed time for one cycle, so this tool requires a positive rate.
Formula
fHz = value times source factor; converted = fHz / target factor. 1 rpm = 1/60 Hz; 1 rad/s = 1/(2 pi) Hz; T = 1/f; omega = 2 pi f.
Worked example
60 rpm is 1 Hz, with a period of 1 s and angular frequency 6.283185 rad/s. A rate of 360 degrees per second represents the same frequency.
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Frequently asked questions
Why does rad/s differ from hertz?
A radian is part of a revolution. One full cycle has 2 pi radians.
Can I convert zero frequency?
A zero rate has no finite period, so this converter accepts positive rates only.
What is the difference between mHz and MHz?
One millihertz is 0.001 Hz; one megahertz is one million hertz.