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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SI system#

(plain text)
terahertzShow sourceTHzTHzTHz1×10-12Derived 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} Hz
gigahertzShow sourceGHzGHzGHz1×10-9Derived 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} Hz
megahertzShow sourceMHzMHzMHz0.000001Derived frequency unit in SI system. One megahertz is equal to one million of hertz: 1MHz=1000 000Hz=106Hz1 MHz = 1000\ 000 Hz = 10^{6} Hz
kilohertzShow sourcekHzkHzkHz0.001Derived frequency unit in SI system. One kilohertz is equal to one thousand of hertz: 1kHz=1000Hz=103Hz1 kHz = 1000 Hz = 10^{3} Hz
hertzShow sourceHzHzHz1Basic frequency unit in SI system. One hertz is equal to one event per second: 1Hz=1s1Hz = \frac{1}{s}
milihertzShow sourcemHzmHzmHz1000Derived frequency unit in SI system. One milihertz is equal to one thousandth of hertz: 1mHz=0.001Hz=103Hz1 mHz = 0.001 Hz = 10^{-3} Hz
microhertzShow sourceμHz\mu HzµHz1000000Derived 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} Hz
nanohertzShow sourcenHznHznHz1000000000Derived 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} Hz


(plain text)
1 per secondShow source1s\frac{1}{s}1/s1One event per second. Equivalent to one hertz. 1s=1Hz\dfrac{1}{s} = 1 Hz
cycle per secondShow sourcecycles\frac{cycle}{s}cycle/s1One cycle per second. Equivalent to one hertz. 1 cycles=1Hz\dfrac{\text{1 cycle}}{s} = 1 Hz
degree per hourShow sourceh\frac{^{\circ}}{h}degree/h1296000One 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} Hz
degree per minuteShow sourcemin.\frac{^{\circ}}{min.}degree/min.21600One 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} Hz
degree per secondShow sources\frac{^{\circ}}{s}degree/s360One 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} Hz
degree per hourShow sourceradh\frac{rad}{h}rad/h22619.467One 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} Hz
degree per minuteShow sourceradmin.\frac{rad}{min.}rad/min.376.99112One 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} Hz
degree per secondShow sourcerads\frac{rad}{s}rad/s6.2831853One 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} Hz
revolution per hourShow sourcerevolutionh\frac{revolution}{h}revolution/h3600Revolutions per hour. See RPM unit for more. 1 rotate3600s=13600Hz\dfrac{\text{1 rotate}}{3600s} = \dfrac{1}{3600} Hz
revolution per minuteShow sourcerevolutionmin.\frac{revolution}{min.}revolution/min.60Revolutions per minute. See RPM unit for more. 1 rotate60s=160Hz\dfrac{\text{1 rotate}}{60s} = \dfrac{1}{60} Hz
revolution per secondShow sourcerevolutions\frac{revolution}{s}revolution/s1Revolutions per second. See RPM unit for more. 1 rotates=1Hz\dfrac{\text{1 rotate}}{s} = 1 Hz
revolution per minuteShow sourceRPMRPMRPM60Revolutions 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} Hz

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}
    • 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.
    • 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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