Frequency units converter
More than 25 frequency units. Common SI units such as hertz (Hz), kilohertz (kHz), gigahertz (GHz), but also some less known like radians per seconds, RPM (rotatinions per minute) or degrees per hours.

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Symbolic algebra

ⓘ Hint: This calculator supports symbolic math. You can enter numbers, but also symbols like a, b, pi or even whole math expressions such as (a+b)/2. If you still don't sure how to make your life easier using symbolic algebra check out our another page: Symbolic calculations

Inputs data - value and unit, which we're going to convert#

Value
Unit
Decimals

#

SI system#

UnitSymbolSymbol
(plain text)
Value as symbolicValue as numericNotesUnit conversion formula
terahertzShow sourceTHzTHzTHzShow source...\text{...}-Derived frequency unit in SI system. One terahertz is equal to one trillion of hertz: 1THz=1000 000 000 000Hz=1012Hz1 THz = 1000\ 000\ 000\ 000 Hz = 10^{12} HzShow source......
gigahertzShow sourceGHzGHzGHzShow source...\text{...}-Derived frequency unit in SI system. One gigahertz is equal to one billion of hertz: 1GHz=1000 000 000Hz=109Hz1 GHz = 1000\ 000\ 000 Hz = 10^{9} HzShow source......
megahertzShow sourceMHzMHzMHzShow source...\text{...}-Derived frequency unit in SI system. One megahertz is equal to one million of hertz: 1MHz=1000 000Hz=106Hz1 MHz = 1000\ 000 Hz = 10^{6} HzShow source......
kilohertzShow sourcekHzkHzkHzShow source...\text{...}-Derived frequency unit in SI system. One kilohertz is equal to one thousand of hertz: 1kHz=1000Hz=103Hz1 kHz = 1000 Hz = 10^{3} HzShow source......
hertzShow sourceHzHzHzShow source...\text{...}-Basic frequency unit in SI system. One hertz is equal to one event per second: 1Hz=1s1Hz = \frac{1}{s}Show source......
milihertzShow sourcemHzmHzmHzShow source...\text{...}-Derived frequency unit in SI system. One milihertz is equal to one thousandth of hertz: 1mHz=0.001Hz=103Hz1 mHz = 0.001 Hz = 10^{-3} HzShow source......
microhertzShow sourceμHz\mu HzµHzShow source...\text{...}-Derived frequency unit in SI system. One microhertz is equal to one millionth of hertz: 1μHz=0.000001Hz=106Hz1 \mu Hz = 0.000001 Hz = 10^{-6} HzShow source......
nanohertzShow sourcenHznHznHzShow source...\text{...}-Derived frequency unit in SI system. One nanohertz is equal to one one billionth of hertz: 1nHz=0.000000001Hz=109Hz1 nHz = 0.000000001 Hz = 10^{-9} HzShow source......

Other#

UnitSymbolSymbol
(plain text)
Value as symbolicValue as numericNotesUnit conversion formula
1 per secondShow source1s\frac{1}{s}1/sShow source...\text{...}-One event per second. Equivalent to one hertz. 1s=1Hz\dfrac{1}{s} = 1 HzShow source......
cycle per secondShow sourcecycles\frac{cycle}{s}cycle/sShow source...\text{...}-One cycle per second. Equivalent to one hertz. 1 cycles=1Hz\dfrac{\text{1 cycle}}{s} = 1 HzShow source......
degree per hourShow sourceh\frac{^{\circ}}{h}degree/hShow source...\text{...}-One degree per hour. Unit of rotational speed equal to 1/360 rotate per hour (because the whole rotate is 360 degrees). 1/3603600s=11296000Hz\dfrac{1 / 360}{3600s} = \dfrac{1}{1296000} HzShow source......
degree per minuteShow sourcemin.\frac{^{\circ}}{min.}degree/min.Show source...\text{...}-One degree per minute. Unit of rotational speed equal to 1/360 rotate per minute (because the whole rotate is 360 degrees). 1/36060s=121600Hz\dfrac{1 / 360}{60s} = \dfrac{1}{21600} HzShow source......
degree per secondShow sources\frac{^{\circ}}{s}degree/sShow source...\text{...}-One degree per second. Unit of rotational speed equal to 1/360 rotate per second (because the whole rotate is 360 degrees). 1/360s=1360Hz\dfrac{1 / 360}{s} = \dfrac{1}{360} HzShow source......
degree per hourShow sourceradh\frac{rad}{h}rad/hShow source...\text{...}-One radian per hour. Unit of rotational speed equal to 1/2π1 / 2\pi rotate per hour (because the whole rotate is 2π2 \pi radians). 1/2π3600s=17200πHz\dfrac{1 / 2\pi}{3600s} = \dfrac{1}{7200\pi} HzShow source......
degree per minuteShow sourceradmin.\frac{rad}{min.}rad/min.Show source...\text{...}-One radian per minute. Unit of rotational speed equal to 1/2π1 / 2\pi rotate per minute (because the whole rotate is 2π2 \pi radians). 1/2π60s=1120πHz\dfrac{1 / 2\pi}{60s} = \dfrac{1}{120\pi} HzShow source......
degree per secondShow sourcerads\frac{rad}{s}rad/sShow source...\text{...}-One radian per second. Unit of rotational speed equal to 1/2π1 / 2\pi rotate per second (because the whole rotate is 2π2 \pi radians). 1/2πs=12πHz\dfrac{1 / 2\pi}{s} = \dfrac{1}{2\pi} HzShow source......
revolution per hourShow sourcerevolutionh\frac{revolution}{h}revolution/hShow source...\text{...}-Revolutions per hour. See RPM unit for more. 1 rotate3600s=13600Hz\dfrac{\text{1 rotate}}{3600s} = \dfrac{1}{3600} HzShow source......
revolution per minuteShow sourcerevolutionmin.\frac{revolution}{min.}revolution/min.Show source...\text{...}-Revolutions per minute. See RPM unit for more. 1 rotate60s=160Hz\dfrac{\text{1 rotate}}{60s} = \dfrac{1}{60} HzShow source......
revolution per secondShow sourcerevolutions\frac{revolution}{s}revolution/sShow source...\text{...}-Revolutions per second. See RPM unit for more. 1 rotates=1Hz\dfrac{\text{1 rotate}}{s} = 1 HzShow source......
revolution per minuteShow sourceRPMRPMRPMShow source...\text{...}-Revolutions per minute. The unit determines the number of turns (i.e. by 360 degrees) performed during one minute. It's a unit of rotational speed or the frequency of rotation around a selected axis. Used for example to measure speed of media under the read head e.g. gramophone disks rotates at speed 16 2⁄3, ​33 1⁄3, 45 or 78 RPM. 1RPM=160s=160Hz1 RPM = \dfrac{1}{60s} = \dfrac{1}{60} HzShow source......

Some facts#

  • Frequency is physical quantity defining number of cycles (events occurring periodically) per time unit.
  • The basic frequency unit in SI system is one Hz (hertz). One hertz corresponds to the frequency of one cycle per second:
    1Hz=1s1 Hz = \dfrac{1}{s}

  • Frequency is usually indicated by a lower case letter f or greek letter ν\nu (nu).
  • To calculate the frequency of an event directly from the definition, use the following formula:
    f=ntf = \dfrac{n}{t}
    where:
    • f - frequency,
    • n - number of recorded events (cycles),
    • t - measurement time.
  • We can find frequency in many everyday areas of life, e.g.
    • The musical note of "A" is used as a standard for tuning musical instrument. It's frequency is 440 Hz. In terms of music, the lower frequency means "lower pitch".
    • The processor i5 2450M is available in versions clocked with frequencies from 2.5 to 3,1 GHz,
    • the plates in most contemporary hard drives make 5400 revolutions per minute (5400 RPM),
    • long play vinyl record (LP) should be played at 33 1/2 revolutions per minut (RPM),
    • program 1 of Polish Radio can be listened in Poland and in neighboring countries on longwave (LW) at frequency 225 kHz,
    • wifi networks use electromagnetic waves with 2,4 GHz or 5 GHz frequency,
    • CD-AUDIO format uses sample rating of 44,1 kHz,
    • the frequency of alternating current (AC) is 50 or 60 Hz depending on the region,
    • etc.

How to convert#

  • Enter the number to field "value" - enter the NUMBER only, no other words, symbols or unit names. You can use dot (.) or comma (,) to enter fractions.
    Examples:
    • 1000000
    • 123,23
    • 999.99999
  • Find and select your starting unit in field "unit". Some unit calculators have huge number of different units to select from - it's just how complicated our world is...
  • And... you got the result in the table below. You'll find several results for many different units - we show you all results we know at once. Just find the one you're looking for.

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