Frequency Converter
Convert between hertz, kilohertz, megahertz, gigahertz, revolutions per minute, beats per minute and other units of frequency.
1 hertz = 1 × 10-9 gigahertz
Most used frequency units
- Hertz Hz Base unit
- Gigahertz GHz 1 GHz = 1,000,000,000 Hz
- Megahertz MHz 1 MHz = 1,000,000 Hz
- Kilohertz kHz 1 kHz = 1,000 Hz
- Revolution per minute rpm 1 rpm = 0.016666667 Hz
- Beat per minute bpm 1 bpm = 0.016666667 Hz
- Terahertz THz 1 THz = 1,000,000,000,000 Hz
- Cycle per second cps 1 cps = 1 Hz
- Revolution per second rps 1 rps = 1 Hz
- Cycle per minute cpm 1 cpm = 0.016666667 Hz
- Per minute min⁻¹ 1 min⁻¹ = 0.016666667 Hz
- Per second s⁻¹ 1 s⁻¹ = 1 Hz
Popular frequency conversions
- Hertz to kilohertz 1 Hz = 0.001 kHz
- Kilohertz to hertz 1 kHz = 1,000 Hz
- Megahertz to gigahertz 1 MHz = 0.001 GHz
- Gigahertz to megahertz 1 GHz = 1,000 MHz
- Hertz to revolutions per minute 1 Hz = 60 rpm
- Revolutions per minute to hertz 1 rpm = 0.01666667 Hz
- Megahertz to hertz 1 MHz = 1,000,000 Hz
- Kilohertz to megahertz 1 kHz = 0.001 MHz
- Beats per minute to hertz 1 bpm = 0.01666667 Hz
- Hertz to beats per minute 1 Hz = 60 bpm
- Gigahertz to hertz 1 GHz = 1,000,000,000 Hz
- Terahertz to gigahertz 1 THz = 1,000 GHz
What is frequency?
Frequency is how often something repeats per unit of time. The SI unit is the hertz (Hz), one cycle per second, named after Heinrich Hertz, who first produced radio waves in 1887. Frequency is the inverse of period: something that repeats every 0.01 seconds has a frequency of 100 Hz.
Frequencies span an enormous range: the mains electricity supply alternates at 50 or 60 Hz, humans hear sound from about 20 Hz to 20 kHz, FM radio broadcasts around 100 MHz, Wi-Fi at 2.4 and 5 GHz, and visible light oscillates at around 400–750 THz. Rotating machines are rated in revolutions per minute (rpm) and heart rates in beats per minute (bpm).
Frequency units from smallest to largest
Every proportional frequency unit on the site, ordered by size and expressed in hertz.
- Per year 3.168874 × 10-8 Hz
- Microhertz 0.000001 Hz
- Per week 0.00000165344 Hz
- Cycle per day 0.0000115741 Hz
- Per day 0.0000115741 Hz
- Cycle per hour 0.000277778 Hz
- Per hour 0.000277778 Hz
- Millihertz 0.001 Hz
- Revolution per minute 0.0166667 Hz
- Cycle per minute 0.0166667 Hz
- Beat per minute 0.0166667 Hz
- Per minute 0.0166667 Hz
- Hertz 1 Hz
- Cycle per second 1 Hz
- Revolution per second 1 Hz
- Per second 1 Hz
- Kilohertz 1,000 Hz
- Megahertz 1,000,000 Hz
- Gigahertz 1,000,000,000 Hz
- Terahertz 1,000,000,000,000 Hz
- Fresnel 1,000,000,000,000 Hz
- Petahertz 1 × 1015 Hz
- Exahertz 1 × 1018 Hz
- Planck frequency 1.854858 × 1043 Hz
All 24 frequency units
Hertz
Cycles & rotation
- Beats per minute
- Cycles per day
- Cycles per hour
- Cycles per minute
- Cycles per second
- Revolutions per minute
- Revolutions per second
Per unit of time
Frequently asked questions
What is 1 hertz?
One cycle, oscillation or event per second.
How many Hz is 1 rpm?
One revolution per minute is 1/60 Hz, about 0.01667 Hz. 3,000 rpm is 50 Hz.
What frequencies can humans hear?
About 20 Hz to 20 kHz for young adults; the upper limit falls with age.