From hertz (Hz)
- Hertz to KilohertzHz → kHz
- Hertz to MegahertzHz → MHz
- Hertz to GigahertzHz → GHz
- Hertz to Revolutions per minuteHz → rpm
Frequency conversion family
Frequency unit conversions
Frequency is the number of periodic cycles per unit time; the hertz (Hz) is the coherent SI unit and equals one reciprocal second. In this family, rpm is treated specifically as rotational frequency.
Five named units
Unit and factor reference
| Unit | Symbol | Factor to base | Relationship | Definition and variant |
|---|---|---|---|---|
| hertz | Hz | 1 | defined | The hertz is the coherent SI unit of frequency: 1 Hz = 1 s^-1 for a periodic phenomenon. The base factor is exactly 1 by the family base-unit choice. |
| kilohertz | kHz | 1000 | exact | A kilohertz is the SI decimal multiple formed by applying kilo (10^3) to hertz: 1 kHz = 1000 Hz. The decimal-prefix relationship is exact. |
| megahertz | MHz | 1000000 | exact | A megahertz is the SI decimal multiple formed by applying mega (10^6) to hertz: 1 MHz = 1000000 Hz. The decimal-prefix relationship is exact. |
| gigahertz | GHz | 1000000000 | exact | A gigahertz is the SI decimal multiple formed by applying giga (10^9) to hertz: 1 GHz = 1000000000 Hz. The decimal-prefix relationship is exact. |
| revolution per minute | rpm | 0.016666666666666666 | conventional | One revolution per minute is one rotational cycle in 60 seconds, so 1 rpm = 1/60 Hz when used as rotational frequency. Named variant: Rotational frequency only; not radians per second. The raw evaluated base factor preserves JavaScript's 1 / 60 result. The relationship is exactly 1/60 Hz; the TypeScript generator later emits 15 significant digits, producing 0.0166666666666667. |
Every ordered pair
All 20 frequency calculators
From kilohertz (kHz)
- Kilohertz to HertzkHz → Hz
- Kilohertz to MegahertzkHz → MHz
- Kilohertz to GigahertzkHz → GHz
- Kilohertz to Revolutions per minutekHz → rpm
From megahertz (MHz)
- Megahertz to HertzMHz → Hz
- Megahertz to KilohertzMHz → kHz
- Megahertz to GigahertzMHz → GHz
- Megahertz to Revolutions per minuteMHz → rpm
From gigahertz (GHz)
- Gigahertz to HertzGHz → Hz
- Gigahertz to KilohertzGHz → kHz
- Gigahertz to MegahertzGHz → MHz
- Gigahertz to Revolutions per minuteGHz → rpm
From revolutions per minute (rpm)
- Revolutions per minute to Hertzrpm → Hz
- Revolutions per minute to Kilohertzrpm → kHz
- Revolutions per minute to Megahertzrpm → MHz
- Revolutions per minute to Gigahertzrpm → GHz
Evidence and review status
This family is machine-reviewed-pending-human. Automated checks verify structure, factor parity and source references; they do not constitute human or specialist approval.
Family assumptions and limits
- This family converts non-negative cyclic or rotational frequency magnitudes; it does not infer phase, wavelength, or measurement uncertainty.
- Revolutions per minute is treated as rotational frequency, so one revolution is one cycle and 1 rpm = 1/60 Hz. It is not angular frequency or angular velocity in radians per second.
- The spellings rpm and rev/min are common conventions; NIST identifies r/min as the unit designation for rotational frequency, while BIPM notes that revolution and rev are not SI units.
- A conversion does not add significant figures to the source measurement.
Authoritative references
- The International System of Units (SI), 9th edition, version 4.01; Bureau International des Poids et Mesures; Cover (V4.01, June 2026); section 2.3.4, Table 4 on pp. 133-134 (frequency, hertz, Hz = s^-1); section 2.3.4 discussion on p. 136 distinguishing Hz from rad/s and noting revolution is not an SI unit; chapter 3, Table 7 on p. 138 for decimal prefixes.; accessed 2026-08-07
- NIST Guide to the SI, Chapter 8: Comments on Some Quantities and Their Units; National Institute of Standards and Technology; Section 8.1, Time and rotational frequency: rotational frequency is revolutions divided by time, its SI unit is s^-1, and r/s and r/min are widely used designations.; accessed 2026-08-07