Frequency Converter

Convert between Hz, kHz, MHz, GHz

Free online frequency unit converter supporting 4 units: Hertz (Hz), Kilohertz (kHz), Megahertz (MHz), Gigahertz (GHz). Real-time conversion with high precision.

How to Use

Simple 3-step process to convert frequency units:

Step 1: Enter Value
Enter the frequency value in any unit field (Hz, kHz, MHz, or GHz)
Step 2: Automatic Conversion
All other unit fields will be automatically converted in real-time
Step 3: Copy Results
Copy the converted values you need for your calculations

All conversions are performed in your browser. No data is sent to our servers.

Frequency Converter Tool

Hertz (Hz)

Kilohertz (kHz)

Megahertz (MHz)

Gigahertz (GHz)

Practical Use Cases

Frequency converters are essential in various fields:

1. Radio and Telecommunications

FM radio: 88-108 MHz. AM radio: 535-1605 kHz. Cell phones: 700 MHz - 2.6 GHz (4G/5G). Convert between units to understand spectrum allocation and signal frequencies.

2. Computer Processors

Modern CPUs operate at GHz frequencies: Intel Core i7: 3.5 GHz = 3500 MHz = 3,500,000 kHz. Understanding frequency helps compare processor speeds and performance.

3. Audio and Sound

Human hearing range: 20 Hz - 20 kHz = 20,000 Hz. Musical note A4: 440 Hz. Converting between Hz and kHz is essential for audio engineering and music production.

4. Wi-Fi and Networking

Wi-Fi operates on two main frequencies: 2.4 GHz and 5 GHz. Bluetooth: 2.4 GHz. Understanding these frequencies in different units helps with network configuration and troubleshooting.

5. Microcontrollers and Electronics

Arduino clock: 16 MHz = 16,000 kHz. PWM frequencies: 490 Hz - 1 kHz. Crystal oscillators: 8 MHz, 12 MHz, 32.768 kHz. Convert frequencies for timer calculations and clock configuration.

What is Frequency Conversion?

Frequency is the number of occurrences of a repeating event per unit of time. Different applications use different frequency units.

Common Frequency Units

Hertz (Hz) is the SI unit of frequency: 1 Hz = 1 cycle per second. Kilohertz (kHz) = 1000 Hz, used for audio and AM radio. Megahertz (MHz) = 1,000,000 Hz, used for FM radio and processors. Gigahertz (GHz) = 1,000,000,000 Hz, used for modern CPUs and wireless communications.

Why Convert Frequency Units?

Different fields use different frequency units based on typical values. Audio engineers use Hz and kHz. Radio engineers use kHz and MHz. Computer scientists use MHz and GHz. Converting between units helps communicate specifications and understand system performance.

Conversion Accuracy

This converter uses exact conversion factors: 1 kHz = 1000 Hz, 1 MHz = 1000 kHz = 1,000,000 Hz, 1 GHz = 1000 MHz = 1,000,000,000 Hz. All conversions are mathematically exact with up to 10 decimal places precision.

Frequently Asked Questions

What is the difference between Hz and kHz?

Hertz (Hz) is the base unit of frequency. Kilohertz (kHz) is 1000 Hz. For example, audio frequency 5000 Hz = 5 kHz. Low frequencies (sub-bass, bass) use Hz, while mid-high audio frequencies use kHz.

How do I convert MHz to Hz?

Multiply MHz by 1,000,000 to get Hz. Example: 100 MHz = 100 × 1,000,000 = 100,000,000 Hz. Conversely, divide Hz by 1,000,000 to get MHz.

What does GHz mean in processors?

GHz (Gigahertz) indicates CPU clock speed: how many billion cycles per second the processor can execute. A 3.5 GHz CPU performs 3.5 billion cycles per second. Higher GHz generally means faster processing, though architecture also matters.

Why is Wi-Fi 2.4 GHz and 5 GHz?

These are the radio frequency bands Wi-Fi uses. 2.4 GHz = 2400 MHz has better range and wall penetration. 5 GHz = 5000 MHz has faster speeds but shorter range. Both are in the microwave spectrum.

What frequency is middle C on a piano?

Middle C (C4) has a frequency of approximately 261.63 Hz = 0.26163 kHz. Musical notes are measured in Hz. The standard tuning reference A4 = 440 Hz.

How accurate is this frequency converter?

This converter uses exact mathematical conversions with up to 10 decimal places. Conversion factors are exact: 1 kHz = 1000 Hz (exact), 1 MHz = 1000 kHz (exact), 1 GHz = 1000 MHz (exact).

What frequency range can humans hear?

Human hearing range is approximately 20 Hz to 20 kHz (20,000 Hz). Children can hear up to 20 kHz, but adults typically lose high-frequency hearing with age, hearing up to 15-17 kHz.

What is the frequency of common radio stations?

FM radio: 88-108 MHz (e.g., 95.5 MHz). AM radio: 535-1605 kHz (e.g., 900 kHz). Shortwave: 3-30 MHz. Different bands use different frequency units based on their typical ranges.