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kHz to MHz Converter

Bidirectional Kilohertz ↔ Megahertz converter 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

1

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 decimal shift by three places — divide kHz by 1,000 to get MHz, or multiply MHz by 1,000 to get kHz.

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 TV use MHz for the same reason. Going from AM dial to FM dial is, mathematically, just two decimal-point shifts.

Wavelength is the other side of the coin

Every frequency has a corresponding wavelength: λ = c / f, where c is the speed of light (≈ 3 × 10⁸ m/s 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 (why the antennas in your laptop are so tiny).

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...).

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