Frequency Converter
Frequency counts how many times something repeats per second. The SI unit is the hertz. Radio and processors use kilohertz through gigahertz, rotating machinery is described in revolutions per minute, and physics often works in radians per second.
28 units supported Base unit hertz (Hz)
About frequency conversion
Frequency conversion is commonly needed when audio, radio, processors, and rotating machinery.
Popular conversions
Convert Hertz to other frequency units
1 Hz expressed in every other frequency unit on this site.
- Hertz Hz 1
- Millihertz mHz 1,000
- Centihertz cHz 100
- Decihertz dHz 10
- Dekahertz daHz 0.1
- Hectohertz hHz 0.01
- Nanohertz nHz 1,000,000,000
- Picohertz pHz 1,000,000,000,000
- Femtohertz fHz 1,000,000,000,000,000
- Attohertz aHz 1e+18
- Microhertz µHz 1,000,000
- Kilohertz kHz 0.001
- Megahertz MHz 0.000001
- Gigahertz GHz 1e-9
- Terahertz THz 1e-12
- Petahertz PHz 1e-15
- Exahertz EHz 1e-18
- Revolution per Minute rpm 60
- Revolution per Second rps 1
- Revolution per Hour rph 3,600
- Radian per Second rad/s 6.2831853
- Radian per Minute rad/min 376.99112
- Degree per Second °/s 360
- Cycle per Minute cpm 60
- Cycle per Hour cph 3,600
- Cycle per Day cpd 86,400
- Beat per Minute bpm 60
- Frame per Second fps 1
Complete list of frequency units
All 28 units this converter supports, each stated against the hertz (Hz).
| Unit | Symbol | System | In hertz | Conversions |
|---|---|---|---|---|
| Hertz | Hz | SI | base unit (Hz) | hz to rpmhz to khz |
| Millihertz | mHz | SI | 1 mHz = 0.001 Hz | — |
| Centihertz | cHz | SI | 1 cHz = 0.01 Hz | — |
| Decihertz | dHz | SI | 1 dHz = 0.1 Hz | — |
| Dekahertz | daHz | SI | 1 daHz = 10 Hz | — |
| Hectohertz | hHz | SI | 1 hHz = 100 Hz | — |
| Nanohertz | nHz | SI | 1 nHz = 1e-9 Hz | — |
| Picohertz | pHz | SI | 1 pHz = 1e-12 Hz | — |
| Femtohertz | fHz | SI | 1 fHz = 1e-15 Hz | — |
| Attohertz | aHz | SI | 1 aHz = 1e-18 Hz | — |
| Microhertz | µHz | SI | 1 µHz = 0.000001 Hz | — |
| Kilohertz | kHz | SI | 1 kHz = 1,000 Hz | khz to hz |
| Megahertz | MHz | SI | 1 MHz = 1,000,000 Hz | mhz to ghz |
| Gigahertz | GHz | SI | 1 GHz = 1,000,000,000 Hz | ghz to mhzghz to hz |
| Terahertz | THz | SI | 1 THz = 1,000,000,000,000 Hz | — |
| Petahertz | PHz | SI | 1 PHz = 1e+15 Hz | — |
| Exahertz | EHz | SI | 1 EHz = 1e+18 Hz | — |
| Revolution per Minute | rpm | Other | 1 rpm = 0.0166666666667 Hz | rpm to hz |
| Revolution per Second | rps | Other | 1 rps = 1 Hz | — |
| Revolution per Hour | rph | Other | 1 rph = 0.000277777777778 Hz | — |
| Radian per Second | rad/s | SI | 1 rad/s = 0.159154943092 Hz | — |
| Radian per Minute | rad/min | SI | 1 rad/min = 0.00265258238486 Hz | — |
| Degree per Second | °/s | Other | 1 °/s = 0.00277777777778 Hz | — |
| Cycle per Minute | cpm | Other | 1 cpm = 0.0166666666667 Hz | — |
| Cycle per Hour | cph | Other | 1 cph = 0.000277777777778 Hz | — |
| Cycle per Day | cpd | Other | 1 cpd = 0.0000115740740741 Hz | — |
| Beat per Minute | bpm | Other | 1 bpm = 0.0166666666667 Hz | — |
| Frame per Second | fps | Other | 1 fps = 1 Hz | — |
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Frequently asked questions
What is the base unit for frequency?
Frequency conversions on this site are calculated against the hertz (Hz).
Which frequency units can I convert?
You can convert between 28 units, including hertz, millihertz, centihertz, decihertz, and more.
Where is frequency conversion useful?
It is commonly needed when audio, radio, processors, and rotating machinery.
Does this converter mix measurement systems?
The converter supports SI, Other units and keeps their exact definitions separate so results stay accurate.
Related categories
Conversion factors are based on internationally agreed unit definitions. See our methodology and sources for details on how these values are verified.