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kHz to MHz Converter

This kHz to MHz converter converts kilohertz to megahertz (and back) with ITU radio-band classification (LF/MF/HF/VHF/UHF/SHF/EHF), wavelength calculation, Hz/GHz cross-reference, and presets for AM, FM, shortwave, ham, CB, cell, and WiFi bands.

Input

Frequency in Kilohertz

kHz

Common Radio Bands

Result

Megahertz

MHz

MF — AM Broadcast

In Hz

1,000,000 Hz

In kHz

1,000 kHz

In MHz

1 MHz

In GHz

0.001 GHz

Wavelength (λ = c / f)

—

Formula

1 MHz = 1,000 kHz = 1,000,000 Hz

λ = c / f (c = 299,792,458 m/s)

MHz = 1,000 kHz ÷ 1000 = 1 MHz

ITU Radio Band Reference

Band	Range (kHz)	Range (MHz)	Wavelength	Common Uses
VLF — Very Low Frequency	3 – 30	0.003 – 0.03	10–100 km	Submarine communication, time signals (WWVB, MSF)
LF — Low Frequency	30 – 300	0.03 – 0.3	1–10 km	Long-wave radio (Europe), aeronautical beacons, RFID (125 kHz)
MF — Medium Frequency	300 – 3,000	0.3 – 3	100 m – 1 km	AM broadcast (530–1,710 kHz), marine radio, NDBs
HF — High Frequency	3,000 – 30,000	3 – 30	10 – 100 m	Shortwave broadcast, CB (27 MHz), ham radio (HF bands)
VHF — Very High Frequency	30,000 – 300,000	30 – 300	1 – 10 m	FM broadcast (88–108 MHz), TV ch 2–13, NOAA weather, 2 m ham, aviation
UHF — Ultra High Frequency	300,000 – 3,000,000	300 – 3,000	10 cm – 1 m	UHF TV, cell (700/850/1,800/1,900 MHz), GPS (1,575 MHz), WiFi 2.4 GHz, Bluetooth
SHF — Super High Frequency	3,000,000 – 30,000,000	3,000 – 30,000	1 – 10 cm	WiFi 5 GHz, satellite TV, radar, microwave ovens (2.45 GHz)
EHF — Extremely High Frequency	30,000,000 – 300,000,000	30,000 – 300,000	1 – 10 mm	5G mmWave (24–86 GHz), automotive radar, radio astronomy
THF — Tremendously High Frequency	300,000,000+	300,000+	0.1 – 1 mm	Terahertz imaging, security scanners, spectroscopy (above 3 THz becomes far-infrared)

About kHz, MHz & Radio Bands

One megahertz (MHz) equals 1,000 kilohertz or 1,000,000 Hz. The conversion between kHz and MHz is a simple decimal shift of three places — divide kHz by 1,000 to get MHz, or multiply MHz by 1,000 to get kHz. This makes the tool both a kHz-to-MHz and an MHz-to-kHz converter in one. The same SI prefix logic applies throughout the electromagnetic spectrum: the same frequency expressed in different units is the same physical oscillation, just written at different scales.

Why kHz vs MHz matters in radio

Radio engineers use whichever unit gives the cleanest number for the band. AM broadcast (530–1,710 kHz) uses kHz because the values fit in 3–4 digits. FM broadcast (88.0–108.0 MHz) and VHF television use MHz for the same reason. Amateur (ham) radio operators often work in both units depending on the band: HF bands are quoted in MHz (e.g., the 40 m band is 7.000–7.300 MHz), while some lower-frequency allocations appear in kHz. This radio frequency converter and radio band calculator also covers shortwave, CB, cellular, and WiFi presets, so you can identify the ITU band classification alongside the converted value. Going from the AM dial to the FM dial is, mathematically, just two decimal-point shifts — 1,000 kHz = 1 MHz. If you need to convert frequencies for audio-range signals rather than radio, the Hz to kHz converter handles the sub-kilohertz range.

Wavelength is the other side of the coin

Every frequency has a corresponding free-space wavelength: λ = c / f, where c is the speed of light (≈ 299,792,458 m/s in vacuum; slightly slower in air). A 1 MHz signal has a wavelength of about 300 metres — that's why AM-band antennas are physically huge. A 100 MHz FM signal has a 3 m wavelength, and a 2.4 GHz WiFi signal has a 12.5 cm wavelength (which is why the antennas inside your laptop are so tiny). The wavelength calculator can compute this for any frequency and propagation medium, including the slower speeds inside coaxial cable or water.

Worked example: how to convert kHz to MHz step by step

The formula is exact and always the same: MHz = kHz ÷ 1,000. Reversing it: kHz = MHz × 1,000. No rounding, no constants — just a decimal shift of three places.

Example — convert 91,500 kHz to MHz: 91,500 ÷ 1,000 = 91.5 MHz. That is a typical FM broadcast frequency (91.5 MHz falls squarely in the 88–108 MHz FM band, classified as VHF by the ITU). Going the other way: 91.5 MHz × 1,000 = 91,500 kHz. Two common reference values worth memorising: the AM broadcast band runs from 530 kHz (0.530 MHz) to 1,710 kHz (1.710 MHz), while CB radio sits at exactly 27,000 kHz = 27 MHz (HF band). For frequencies above 1,000 MHz, the next step up is the MHz to GHz converter; for audio-range signals below 1 kHz, use the Hz to kHz converter first.

Frequently Asked Questions

How do I convert kHz to MHz?

Divide the kilohertz value by 1,000. For example, 27,000 kHz ÷ 1,000 = 27 MHz (CB radio). To go the other way: 100 MHz × 1,000 = 100,000 kHz (FM broadcast).

What MHz is AM and FM broadcast?

AM broadcast uses the medium-frequency band, roughly 0.53–1.71 MHz (530–1,710 kHz). FM broadcast uses the very-high-frequency band, 88–108 MHz worldwide (slightly narrower in Japan: 76–95 MHz).

What MHz is WiFi?

WiFi 2.4 GHz band runs 2,400–2,483.5 MHz (2,400,000–2,483,500 kHz). WiFi 5 GHz band runs 5,150–5,895 MHz. WiFi 6E adds the 6 GHz band: 5,925–7,125 MHz. All three are in the UHF/SHF region — very different from AM/FM broadcast.

What's the difference between LF, MF, HF, VHF, UHF?

These are ITU radio band names defined by frequency decade: LF (30–300 kHz), MF (300 kHz–3 MHz), HF (3–30 MHz), VHF (30–300 MHz), UHF (300 MHz–3 GHz). Each band has different propagation behaviour — LF wraps around the Earth and into water; HF bounces off the ionosphere for global shortwave; VHF/UHF are line-of-sight.

How does wavelength relate to MHz?

Wavelength (λ) and frequency (f) are inversely related by λ = c / f, where c is the speed of light. A useful shortcut: λ (in metres) ≈ 300 / f (in MHz). So a 100 MHz signal has ~3 m wavelength, a 30 MHz signal has ~10 m, and a 3 MHz signal has ~100 m. This is why "shortwave" radio gets its name — wavelengths of tens of metres are short compared to the kilometre-scale LF and MF waves.

Why does shortwave use kHz but FM uses MHz?

Convention and convenience. Shortwave bands fall in the 3,000–30,000 kHz range (3–30 MHz). Older broadcaster tradition uses kHz on shortwave dials because international broadcast slots are spaced 5 kHz apart — kHz gives finer resolution. FM stations are spaced 200 kHz apart (US) or 100 kHz (Europe), so MHz with one decimal place is sufficient (88.1, 88.3, 88.5...).

What frequency in MHz is GPS, Bluetooth, and cellular?

GPS L1 is 1,575.42 MHz (1,575,420 kHz); GPS L2 is 1,227.6 MHz. Bluetooth operates in the 2,400–2,483.5 MHz (2.4 GHz) ISM band, the same range as 2.4 GHz WiFi. LTE/4G cellular uses multiple bands; common ones include 700 MHz (Band 12/17, 700,000–756,000 kHz), 1,900 MHz, and 2,100 MHz. 5G sub-6 GHz extends from about 600 MHz up to 6,000 MHz, while 5G mmWave starts at 24,000 MHz (24 GHz).

How do I convert a crystal oscillator frequency from kHz to MHz?

Crystal oscillators are often specified in kHz for low-frequency applications (e.g., a 32.768 kHz watch crystal) or MHz for higher-speed circuits (e.g., a 16 MHz Arduino clock). To convert: 32.768 kHz ÷ 1,000 = 0.032768 MHz; 16 MHz × 1,000 = 16,000 kHz. When reading a crystal's datasheet, note whether the value is in kHz or MHz to avoid an off-by-1,000 error in clock configuration — a common source of timing bugs in embedded systems.

What ham radio bands are measured in kHz vs MHz?

Ham radio bands below 3 MHz are often discussed in kHz: the 160 m band is 1,800–2,000 kHz (1.8–2 MHz), and the 630 m band is around 472–479 kHz. Bands from 3 MHz upward are nearly always quoted in MHz: 80 m (3.5–4 MHz), 40 m (7.0–7.3 MHz), 20 m (14.0–14.35 MHz), 10 m (28–29.7 MHz), 2 m (144–148 MHz), and 70 cm (420–450 MHz). VHF/UHF allocations above 300 MHz are sometimes further split into GHz sub-bands for microwave contesting.

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