What is the base SI unit for frequency?

The primary reference unit for frequency in this converter is the Hertz (Hz). All 9 supported frequency units are anchored to this standard.

Are these frequency conversion factors verified?

Yes, all frequency conversion constants on UnitConvertersGo are verified against NIST Special Publication 811 and ISO/IEC 80000 international metrology standards.

Frequency Converter

Enter a value below to convert between metric, imperial, and standard frequency units.

Convert Frequency

Enter a value and select the units to convert between hertz, megahertz, and rpm.

Instant conversion

Value

From

Result

0.01 kHz

10 Hz = 0.01 kHz

10 Hz = 0.00001 MHz = 600 RPMGet Widget

You can change the units using the dropdowns above or click on a unit button.

Suggested Conversions

Common Frequency Reference Points

Here are some common frequency values in Hertz (Hz), Megahertz (MHz), and Revolutions per Minute (RPM). Click any preset value or arrow to load it into the converter.

Description	Hertz (Hz)	Megahertz (MHz)	Revolutions per Minute (RPM)
1 Hertz (1 cycle/sec = 60 RPM)	1	0.000001	60
AC utility power grid (50 Hz)	50	0.00005	3,000
AC power grid US/Americas (60 Hz)	60	0.00006	3,600
Concert pitch A4 note (440 Hz)	440	0.00044	26,400
1 Kilohertz audio tone (1,000 Hz)	1,000	0.001	60,000

Frequency Conversion Formulas

Use the following formulas to convert between hertz, megahertz, and rpm.

Hertz to RPM

RPM = Hz × 60

MHz to Hertz

Hz = MHz × 1,000,000

GHz to MHz

MHz = GHz × 1,000

Example: Convert 60 Hertz (Hz) to Revolutions per Minute (RPM)

RPM = 60 × 60

RPM = 3,600 RPM

1 Hertz equals 1 cycle per second, so multiplying Hertz by 60 gives cycles (or revolutions) per minute.

More Hertz & Kilohertz Conversions

Convert from Hertz

Convert to Kilohertz

Frequently Asked Questions

1 hertz (Hz) equals 0.001 kilohertz (kHz). Multiply your hertz value by 0.001 or enter it in the Frequency Converter above for instant calculation.

Frequency Converter

Quick Info

Hertz (Hz) is the SI derived unit of frequency defined as 1 cycle per second (s⁻¹).
kHz, MHz & GHz measure audio, radio RF bands, Wi-Fi, and CPU clock rates (1 GHz = 1,000 MHz = 10⁹ Hz).
RPM (Revolutions per Minute) measures mechanical shaft, motor, and turbine rotation speed (60 RPM = 1 Hz).
Period T = 1 / f: The time period of one cycle in seconds is the reciprocal of frequency in Hertz.

Frequency Units Comparison

Hertz (Hz)

SI unit of frequency equal to 1 periodic cycle per second.

Megahertz (MHz)

Equal to 1,000,000 Hertz (1,000 kHz), used in FM radio and clock frequencies.

Revolutions per Min (RPM)

Mechanical rotational frequency where 1 RPM equals 1/60 Hz.

References

[1]NIST OWM · SI Units — Time & Frequency
Source
[2]BIPM · SI Base Unit: Second (s) & Hertz (Hz)
Source
[3]NIST CUU · Derived SI Unit: Hertz (Hz)
Source

Related Categories

Add This Calculator to Your Site

Free HTML widget · 4 embed formats

Embed the interactive Frequency Converter widget on your blog, classroom, or documentation page.

Customize & Get Embed Code

All Frequency Conversion Calculators (9)

Select any dedicated frequency pair below for worked examples and printable tables

Hertz to Kilohertz (Hz to kHz)Kilohertz to Megahertz (kHz to MHz)Megahertz to Gigahertz (MHz to GHz)RPM to Hertz (Revolutions per Min to Hz)Megahertz to Hertz (MHz to Hz)Hertz to Megahertz (Hz to MHz)Kilohertz to Hertz (kHz to Hz)Gigahertz to Hertz (GHz to Hz)Gigahertz to Megahertz (GHz to MHz)

Category Conversion Matrix

Simultaneous comparison of 9 units in this category

Hertz (Hz)

Kilohertz (kHz)

0.001

Megahertz (MHz)

0.000001

Gigahertz (GHz)

1.000000e-9

Terahertz (THz)

1.000000e-12

Petahertz (PHz)

1.000000e-15

Exahertz (EHz)

1.000000e-18

Microhertz (µHz)

1,000,000

Revolutions per Minute (RPM)

Frequency Unit Definitions & Symbols

Hertz (Hz)

SI unit of frequency equal to 1 cycle per second.

Kilohertz (kHz)

METRIC

Equal to 1,000 Hz.

Megahertz (MHz)

METRIC

Equal to 1,000,000 Hz.

Gigahertz (GHz)

METRIC

Equal to 1,000,000,000 Hz.

Terahertz (THz)

Equal to 10¹² Hz.

Petahertz (PHz)

Equal to 10¹⁵ Hz.

Exahertz (EHz)

Equal to 10¹⁸ Hz.

Microhertz (µHz)

METRIC

One-millionth of a Hertz.

Revolutions per Minute (RPM)

OTHER

1 RPM = 1/60 Hz.

References

NIST · BIPM · ISO

[1]
NIST OWM (SI Units — Time & Frequency)·Frequency Metrology Standards — Hertz (Hz), Kilohertz (kHz) & Megahertz (MHz)
NIST OWM Standard
[2]
BIPM (SI Base Unit: Second (s) & Hertz (Hz))·International Reference Specification for Frequency & Cycles
BIPM Reference
[3]
NIST CUU (Derived SI Unit: Hertz (Hz))·Official Frequency Conversion Factors & Rounding Rules
NIST CUU Tables

Measurement Navigator78 Categories9 Scientific Domains

Browse All 78 Measurement Categories

A–Z Directory →Sitemap

Light & Optics ConvertersPhotometry, radiometry, display resolution, and wave frequency calculators including luminance, luminous intensity, illumination (lux to foot-candles), digital image resolution, and frequency/wavelength.

Digital Image Resolution

4 units

Frequency

9 unitsCurrent