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Kilohertz to Megahertz

1 Kilohertz (kHz) = 0.001Megahertz (MHz)

By KAMP Inc. / UnitOwl · Last reviewed:

Result
0.001 MHz
1 kHz = 0.001 MHz
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How to Convert kHz to MHz?

One kilohertz (kHz) equals 0.001 megahertz (MHz). To convert kHz to MHz, divide the kHz value by 1,000. This conversion bridges the audio/low-frequency world (measured in kHz) and the radio/wireless world (measured in MHz). AM radio stations broadcast in the kHz range (530-1,700 kHz) while FM radio uses MHz (88-108 MHz). When tuning a shortwave radio, frequencies might be listed as 7,200 kHz or 7.2 MHz — the same frequency expressed differently. Electronics hobbyists, amateur (ham) radio operators, and telecommunications engineers frequently convert between kHz and MHz when working across different equipment and reference materials. The conversion is especially helpful because some bands sit near the boundary where both units are common. RF test gear, ham manuals, and regulatory tables often mix the two styles, so converting confidently prevents tuning errors and makes it easier to compare AM, shortwave, audio, and higher-frequency systems on the same scale. The wrong unit can move you thousands of kilohertz off target instantly. That consistency matters when switching between receivers and reference charts. It also helps when logging measurements from mixed instruments.

How to Convert Kilohertz to Megahertz

  1. Start with your frequency in kilohertz (kHz).
  2. Divide the kHz value by 1,000 to get megahertz (MHz).
  3. The result is your frequency in MHz.
  4. Move the decimal point three places to the left.
  5. For example, 7,200 kHz = 7.2 MHz, 14,300 kHz = 14.3 MHz.

Real-World Examples

An AM radio station at 1,050 kHz. What is that in MHz?
1,050 / 1,000 = 1.05 MHz. AM radio spans approximately 0.53-1.7 MHz.
A ham radio 20-meter band frequency of 14,250 kHz.
14,250 / 1,000 = 14.25 MHz. Ham radio operators use both kHz and MHz interchangeably.
An audio sampling rate of 48 kHz. What is that in MHz?
48 / 1,000 = 0.048 MHz. Far below radio frequencies, showing why audio uses kHz, not MHz.
A shortwave broadcast on 9,505 kHz.
9,505 / 1,000 = 9.505 MHz. International shortwave bands span roughly 3-30 MHz.
An ultrasonic cleaner operates at 40 kHz.
40 / 1,000 = 0.04 MHz. This shows how low-frequency industrial ultrasonics sit far below broadcast-radio MHz ranges.

Quick Reference

Kilohertz (kHz)Megahertz (MHz)
10.001
20.002
50.005
100.01
250.025
500.05
1000.1
5000.5
1,0001

History of Kilohertz and Megahertz

The kilohertz was the standard unit for radio frequencies in the early 20th century, when broadcasting technology operated at relatively low frequencies. AM radio, which launched commercially in the 1920s, uses frequencies between 530-1,700 kHz. As technology advanced to higher frequencies — FM radio, television, radar — the megahertz became more practical. Amateur radio uniquely straddles both ranges, with bands from 1.8 MHz (1,800 kHz) to 1,300 MHz (1.3 GHz), and ham operators fluently switch between kHz and MHz notation depending on the band.

Common Mistakes to Avoid

  • Multiplying by 1,000 instead of dividing. This converts MHz to kHz (the opposite direction). kHz values are always larger numbers than their MHz equivalents.
  • Confusing kHz (frequency) with kbps (data rate). These are completely different measurements. 100 kHz is a frequency, while 100 kbps is a data transfer rate.
  • Using kHz when MHz is expected (or vice versa) in radio equipment. Setting a radio to 14.250 when it expects kHz (14.250 kHz = 0.01425 MHz) instead of 14,250 kHz results in tuning to the completely wrong frequency.
  • Dropping the leading zero on results below 1 MHz. A station at 880 kHz is 0.88 MHz, not 88 MHz.
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Frequently Asked Questions

When should I use kHz vs. MHz?
Convention: use kHz for audio frequencies (20 Hz - 48 kHz), AM radio (530-1,700 kHz), and some ham radio bands. Use MHz for FM radio (88-108 MHz), VHF/UHF communications, and Wi-Fi. The choice usually gives the most readable number for the frequency range.
What are the major radio frequency bands in kHz and MHz?
LF (Low Frequency): 30-300 kHz. MF (Medium Frequency): 300-3,000 kHz (AM radio). HF (High Frequency): 3-30 MHz (shortwave). VHF: 30-300 MHz (FM radio). UHF: 300-3,000 MHz (TV, cellular).
Why do some ham radio operators use kHz while others use MHz?
Tradition and convenience. On HF bands (3-30 MHz), operators often use kHz for precision when tuning: "7,125 kHz" is easier to communicate than "7.125 MHz." On VHF/UHF (30+ MHz), operators use MHz because the numbers are more manageable.
Why is AM radio usually written in kHz while FM radio is written in MHz?
Because AM broadcast frequencies are in the hundreds or low thousands of kilohertz, while FM lives in the tens of megahertz. Each service uses the unit that produces the most readable numbers for its frequency range.
How many MHz is 1,000 kHz?
1,000 kHz equals exactly 1 MHz. That is a useful benchmark because many AM and shortwave frequencies sit just below or above the 1 MHz mark.
Quick Tip

For radio enthusiasts: the HF (shortwave) bands are typically referenced in both kHz and MHz. The key bands and their dual notations: 80m = 3,500-4,000 kHz (3.5-4.0 MHz), 40m = 7,000-7,300 kHz (7.0-7.3 MHz), 20m = 14,000-14,350 kHz (14.0-14.35 MHz), 10m = 28,000-29,700 kHz (28.0-29.7 MHz). Being fluent in both notations is essential for ham radio.

Sources & References