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Frequency Converter

Convert hertz, kHz, MHz, GHz, RPM & 10+ frequency units instantly. Used by RF engineers, audio pros & electronics designers. Free, no sign-up, displays up to 15 decimals.

Last revised 5 September 2026

By Team GlobalCalqulate · About our editorial standards

Frequency Conversion

Value

Enter the frequency value to convert.

From Unit

Select the unit you want to convert from.

To Unit

Select the unit you want to convert to.

Decimal Places

Number of decimal places for the result (max 15).

Disclaimer: This converter uses exact, internationally defined conversion factors for electronics, audio, and RF engineering use (hertz, kHz, MHz, GHz, RPM, and related units), but results are for general reference only. For precision RF design, spectrum-licensing compliance, or safety-critical timing work, verify figures against certified test equipment and applicable regulatory standards. Full disclaimer.

Sources & methodology

Formula:: Two-step conversion through a base unit
Reference:: Bureau International des Poids et Mesures (BIPM)
Content last updated:: September 2026
Scheduled re-verification:: September 2027

Calculation type: Exact calculation. Figures are taken from Bureau International des Poids et Mesures (BIPM) and International Organization for Standardization (ISO) and Institute of Electrical and Electronics Engineers (IEEE) — see sources below.

Formula & methodology

Formula used

Two-step conversion through a base unit

value_out = (value_in × factor_in→the hertz) ÷ factor_out→the hertz

Every frequency unit is defined as a multiple of the hertz. A conversion goes in to the hertz and back out again, so one factor per unit covers every possible pair rather than needing a factor for each combination.

Variable definitions

Symbol	Meaning	Unit
factor	Conversion factor. how many hertz one unit represents	Hz

Step-by-step calculation

1. Choose the unit you have
The value is converted to hertz first.
2. Choose the unit you want
Hertz are converted out to the target unit.

Limitations

Hertz counts cycles per second; radians per second measures angular frequency. They differ by a factor of 2π and describe different things.
Revolutions per minute is a rotational rate: 1 rpm = 1/60 Hz.
The conversion factors are exact by definition, not measured, so the only error in a result is the rounding you choose for display.

This page is educational. It converts between units using the defined or standard factors shown above, so the arithmetic is exact to the precision displayed — but a converted value is only as good as the measurement behind it, and some units are defined only under stated conditions. Where a conversion is safety-critical or contractual, check it against the governing standard rather than relying on this page.

Sources & references

The International System of Units (SI Brochure, 9th edition) — the hertz as the SI derived unit of frequency — Bureau International des Poids et Mesures (BIPM)
ISO 80000-3:2019 — Quantities and units, Part 3: Space and time (frequency, angular frequency, rotational frequency) — International Organization for Standardization (ISO)
IEEE Std 260.1 — IEEE Standard for Letter Symbols for Measurement Units (SI and Other Common Units) — Institute of Electrical and Electronics Engineers (IEEE)

Verified against internationally recognized measurement standards (BIPM SI Brochure, ISO 80000-3, and IEEE Std 260.1). All conversion factors on this page are exact by definition (metric prefixes, the 2π relationship between hertz and radians per second, and the 60-second-per-minute time base), so results are limited only by the display rounding you choose. Standards review: August 2026.

Help & FAQs

Frequently Asked Questions

Clear answers to common questions to help you use this calculator confidently.

How do I convert Hz to MHz?

Tap to view the answer

Divide hertz by 1,000,000. Example: 2,400,000,000 Hz = 2,400 MHz. To go the other way, multiply MHz by 1,000,000 to get Hz.

What is 2.4 GHz in MHz?

Tap to view the answer

2.4 GHz = 2,400 MHz, since 1 GHz = 1,000 MHz exactly. This is the common WiFi band frequency.

How do I convert RPM to Hz?

Tap to view the answer

Divide RPM by 60. Example: 3,600 RPM ÷ 60 = 60 Hz, the frequency of a motor spinning at 3,600 revolutions per minute. To go the other way, multiply Hz by 60 to get RPM.

What is the difference between Hz and rad/s?

Tap to view the answer

Hertz (Hz) counts cycles per second, while radians per second (rad/s) measures angular frequency around a full circle. They're related by ω = 2πf, so 1 rad/s ≈ 0.159155 Hz.

How accurate is this frequency converter?

Tap to view the answer

It uses exact, internationally defined metric-prefix conversions (1 kHz = 1,000 Hz, 1 MHz = 1,000,000 Hz) and the exact 2π relationship between Hz and rad/s, so results are precise to the number of decimal places you choose.

Need more help? Contact support or email globalcalqulate@gmail.com

We typically reply within 24–48 hours.

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How to Use This Calculator

Enter Frequency Value

Type the numeric frequency value you want to convert, such as a WiFi band, RPM reading, or clock speed.

Select Source Unit

Choose the unit your value is currently in (e.g., Hertz, MHz, or RPM).

Select Target Unit

Choose the unit you want to convert to (e.g., GHz, rad/s, or Cycles Per Minute).

View Results

See the converted value, the exact conversion formula used, and a real‑world frequency comparison.

Common frequency conversions for electronics, audio and machinery
From	To	Conversion
1 kHz	1,000 Hz	1,000
1 MHz	1,000,000 Hz	1,000,000
1 GHz	1,000 MHz	1,000
1 GHz	1,000,000,000 Hz	1,000,000,000
1 Hz	60 RPM	60
1 RPM	0.0166667 Hz	0.0166667
60 RPM	1 Hz	1
1 Hz	6.28318531 rad/s	6.28318531
2.4 GHz	2,400 MHz	2,400

From

Conversion

1 kHz

1,000 Hz

1,000

1 MHz

1,000,000 Hz

1,000,000

1 GHz

1,000 MHz

1,000

1 GHz

1,000,000,000 Hz

1,000,000,000

1 Hz

60 RPM

1 RPM

0.0166667 Hz

0.0166667

60 RPM

1 Hz

6.28318531 rad/s

6.28318531

2.4 GHz

2,400 MHz

2,400

Understanding Your Results

Hertz (Hz)
The SI unit of frequency, equal to one cycle per second. Used for all periodic phenomena.
Kilohertz (kHz), Megahertz (MHz), Gigahertz (GHz)
Metric prefixes: 1 kHz = 1,000 Hz, 1 MHz = 1,000,000 Hz, 1 GHz = 1,000,000,000 Hz.
RPM (Revolutions Per Minute)
Commonly used for rotational speed. 1 RPM = 1/60 Hz ≈ 0.0166667 Hz.
Radians Per Second (rad/s)
The SI unit for angular frequency. 1 rad/s = 1/(2π) Hz ≈ 0.159155 Hz.
Common Frequency Bands
WiFi: 2.4 GHz, 5 GHz, 6 GHz. 5G: 600 MHz – 39 GHz. FM Radio: 88–108 MHz.

Key Tips

✓
1 kHz = 1,000 Hz; 1 MHz = 1,000,000 Hz; 1 GHz = 1,000,000,000 Hz.
✓
RPM to Hz: divide RPM by 60. Example: 60 RPM = 1 Hz.
✓
Hz to RPM: multiply Hz by 60. Example: 1 Hz = 60 RPM.
✓
rad/s to Hz: divide by 2π (≈ 6.28318).
✓
WiFi uses 2.4 GHz, 5 GHz, and 6 GHz bands.
✓
FM radio broadcasts at 88–108 MHz.
✓
Power line frequency: 50 Hz (Europe) or 60 Hz (US).

Understanding Frequency Units

What is Frequency?

Frequency is the number of occurrences of a repeating event per unit time. The SI unit is the hertz (Hz), equal to one cycle per second.

Common Frequency Units

Hertz (Hz), kilohertz (kHz), megahertz (MHz), gigahertz (GHz), and terahertz (THz) for electromagnetic waves. RPM for rotational speed.

Hertz vs. Angular Frequency

Hertz (Hz) counts cycles per second, while radians per second (rad/s) measures angular frequency around a full circle (2π radians per cycle). The two are related by ω = 2πf, so 1 rad/s ≈ 0.159155 Hz — a distinction that matters when working with AC circuit equations or rotational motion.

Electromagnetic Spectrum

Radio waves (kHz–GHz), microwaves (GHz), infrared (THz), visible light (THz–PHz), and beyond. Understanding frequency units is key.

Formula & methodology

Formula used

Two-step conversion through a base unit

value_out = (value_in × factor_in→the hertz) ÷ factor_out→the hertz

Variable definitions

Symbol	Meaning	Unit
factor	Conversion factor. how many hertz one unit represents	Hz

Step-by-step calculation

1. Choose the unit you have
The value is converted to hertz first.
2. Choose the unit you want
Hertz are converted out to the target unit.

Limitations

Hertz counts cycles per second; radians per second measures angular frequency. They differ by a factor of 2π and describe different things.
Revolutions per minute is a rotational rate: 1 rpm = 1/60 Hz.
The conversion factors are exact by definition, not measured, so the only error in a result is the rounding you choose for display.

Sources & references

Calculator inputs

Frequency Conversion

Your results

Sources & methodology

Formula & methodology

Formula used

Two-step conversion through a base unit

Variable definitions

Step-by-step calculation

Limitations

Sources & references

How do I convert Hz to MHz?

What is 2.4 GHz in MHz?

How do I convert RPM to Hz?

What is the difference between Hz and rad/s?

How accurate is this frequency converter?

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Calculator inputs

Frequency Conversion

Your results

Sources & methodology

How to Use This Calculator

Example: Convert 2.4 GHz to MHz

Common Frequency Conversions

Understanding Your Results

Key Tips

Understanding Frequency Units

What is Frequency?

Common Frequency Units

Hertz vs. Angular Frequency

Electromagnetic Spectrum

Formula & methodology

Formula used

Two-step conversion through a base unit

Variable definitions

Step-by-step calculation

Limitations

Sources & references

How to Use This Calculator

Example: Convert 2.4 GHz to MHz

Common Frequency Conversions

Understanding Your Results

Key Tips

Understanding Frequency Units

What is Frequency?

Common Frequency Units

Hertz vs. Angular Frequency

Electromagnetic Spectrum