Frequency Converter
Convert between Hz, kHz, MHz, and GHz.
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1 MHz = 0.001 GHz
| Megahertz (MHz) | Gigahertz (GHz) |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 15 | 0.015 |
| 20 | 0.02 |
| 25 | 0.025 |
| 50 | 0.05 |
| 75 | 0.075 |
| 100 | 0.1 |
| 150 | 0.15 |
| 200 | 0.2 |
| 250 | 0.25 |
| 500 | 0.5 |
| 1,000 | 1 |
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Frequency Units Explained
Hertz (Hz) measures cycles per second. It's the fundamental unit of frequency. Larger units are simply multiples: kHz = 1,000 Hz, MHz = 1,000,000 Hz, GHz = 1,000,000,000 Hz.
Frequency Reference
| Source | Frequency |
|---|---|
| Human hearing range | 20 Hz - 20 kHz |
| Middle A (musical note) | 440 Hz |
| AM radio | 530 - 1,700 kHz |
| FM radio | 87.5 - 108 MHz |
| WiFi (2.4 GHz band) | 2.4 GHz |
| WiFi (5 GHz band) | 5 GHz |
| Microwave ovens | 2.45 GHz |
| Modern CPUs | 3 - 5 GHz |
Your WiFi router and microwave oven operate at nearly the same frequency (2.4–2.45 GHz), which is why a running microwave can sometimes interfere with WiFi signals on the 2.4 GHz band. The 5 GHz WiFi band avoids this interference but has shorter range.
When to use this
You are reading a CPU spec sheet that lists clock speed in GHz and want to know the equivalent in MHz for comparison with an older processor. Or you are tuning a radio and need to convert between kHz and MHz to find the right frequency band. Or you are studying signal processing and need to move between hertz, kilohertz, megahertz, and gigahertz for calculations. Frequency conversion is essential in electronics, telecommunications, audio engineering, and computer science.
The conversions follow standard SI prefixes: 1 kHz = 1,000 Hz, 1 MHz = 1,000,000 Hz, 1 GHz = 1,000,000,000 Hz. While the math is just multiplying or dividing by 1,000, it is easy to lose track of zeros when dealing with numbers like 2,400,000,000 Hz (which is 2.4 GHz — the frequency of standard Wi-Fi). This converter eliminates that mental arithmetic.
Good to know
Hz measures cycles per second. One hertz means one complete cycle per second. The unit is named after Heinrich Hertz, who first proved the existence of electromagnetic waves in 1887. Everything that oscillates — sound waves, radio signals, CPU clocks, alternating current — is measured in hertz.
Human hearing ranges from 20 Hz to 20,000 Hz (20 kHz). Most adults lose sensitivity above 15–16 kHz with age. Audio equipment specs often list frequency response in Hz to kHz. A good speaker reproduces 40 Hz to 20 kHz; a subwoofer goes down to 20 Hz or below.
Wi-Fi, Bluetooth, and microwaves all operate near 2.4 GHz. This is not a coincidence for microwaves and Wi-Fi — the 2.4 GHz band was originally set aside because it was considered "junk spectrum" partly occupied by microwave ovens. This is also why your Wi-Fi can sometimes be disrupted by a running microwave.
Quick Reference
| Frequency | Equivalent | Common Use |
|---|---|---|
| 50 Hz | 0.05 kHz | EU power grid (AC) |
| 60 Hz | 0.06 kHz | US power grid (AC) |
| 440 Hz | 0.44 kHz | Concert pitch (A4 note) |
| 20 kHz | 20,000 Hz | Upper limit of hearing |
| 88 MHz | 88,000 kHz | FM radio band start |
| 108 MHz | 108,000 kHz | FM radio band end |
| 2.4 GHz | 2,400 MHz | Wi-Fi / Bluetooth |
| 5 GHz | 5,000 MHz | Wi-Fi 5/6 |
| 3.5 GHz | 3,500 MHz | Modern CPU clock speed |
| 5.8 GHz | 5,800 MHz | High-end CPU boost clock |