Aisha K.
Mar 12, 2026
Clean layout and the results update instantly. Exactly what I needed for a quick planning check.
Unit Converters
SI Hertz Prefix Converter (kHz, MHz, GHz, THz)
to = from × 10^(fromExp − toExp) on hertz. 1 MHz = 1,000 kHz = 10⁶ Hz.
Audio A4 is 440 Hz. FM radio lives in megahertz. Wi-Fi and CPUs argue in gigahertz. IR spectroscopy climbs into terahertz. Same hertz, different zeros. This grid also covers millihertz if you are watching a very slow oscillator.
hertz · 420 prefix pairs
megahertz
0.44 MHz
Multiply by 10^-3. Same dimension; only the zeros move.
- You entered
- 440 kHz
- Factor
- 10^-3
- In scientific notation
- 4.400000e-1
Plain-English guide
Terms & how it works
Confused by a field? Read the short definitions here while you use the tool.
From prefix
The “From prefix” value used in this tool’s formula. Adjust it to see results update live.
How this calculator works
Audio A4 is 440 Hz. FM radio lives in megahertz. Wi-Fi and CPUs argue in gigahertz. IR spectroscopy climbs into terahertz. Same hertz, different zeros. This grid also covers millihertz if you are watching a very slow oscillator. to = from × 10^(fromExp − toExp) on hertz. 1 MHz = 1,000 kHz = 10⁶ Hz. Example: 440 Hz → 0.440 kHz. 2.4 GHz Wi-Fi → 2,400 MHz.
to = from × 10^(fromExp − toExp) on hertz. 1 MHz = 1,000 kHz = 10⁶ Hz.
Example: 440 Hz → 0.440 kHz. 2.4 GHz Wi-Fi → 2,400 MHz.
When to use this SI Hertz Prefix
Common use cases
- Audio A4 is 440 Hz. FM radio lives in megahertz. Wi-Fi and CPUs argue in gigahertz. IR spectroscopy climbs into terahertz. Same hertz, different zeros. This grid also covers millihertz if you are watching a very slow oscillator.
- Sanity-check with this case: 440 Hz → 0.440 kHz. 2.4 GHz Wi-Fi → 2,400 MHz.
- The relationship is: to = from × 10^(fromExp − toExp) on hertz. 1 MHz = 1,000 kHz = 10⁶ Hz.
Localized examples
- Unit Converters: the example on this page uses the same formula as the widget.
What you get
- Fields: From prefix
- to = from × 10^(fromExp − toExp) on hertz. 1 MHz = 1,000 kHz = 10⁶ Hz.
- Example on the page: 440 Hz → 0.440 kHz. 2.4 GHz Wi-Fi → 2,400 MHz.
How to Convert SI Hertz Prefix Step-by-Step
- 1Enter From prefix. Use the values you have, not a catalog average, unless that is all you know.
- 2to = from × 10^(fromExp − toExp) on hertz. 1 MHz = 1,000 kHz = 10⁶ Hz.
- 3Worked case: 440 Hz → 0.440 kHz. 2.4 GHz Wi-Fi → 2,400 MHz.
- 4Check which dictionary the other person is using — US or UK, decimal or 1,024 — then trust the number.
Governing formula
to = from × 10^(fromExp − toExp) on hertz. 1 MHz = 1,000 kHz = 10⁶ Hz.
440 Hz → 0.440 kHz. 2.4 GHz Wi-Fi → 2,400 MHz.
Example: set From prefix = 440, then read the result.
Variable definitions
- value
From prefix
The “From prefix” field. Default 440; typical range 0–1e+24.
- The conversion (to = from × 10^(fromExp − toExp) on hertz. 1 MHz = 1,000 kHz = 10⁶ Hz.) does not pick US vs UK gallons, SI vs binary megabytes, or Mach at altitude for you. Read the footnote on the page.
- Nothing here is uploaded for the calculation itself.
Frequently Asked Questions
Beats per minute divide by 60 to get Hz. This page does not do that mix.
Related calculators
Unit Converters
- Kilohertz to MegahertzDivide kHz by 1,000. AM radio in kHz, FM in MHz. 440 kHz is 0.44 MHz. 2,400 kHz is 2.4 MHz — not 2.4 GHz Wi-Fi; that is another thousand. The SI hertz prefix tool covers GHz and THz in the same grid.
- SI Ampere Prefix ConverterLED strings in milliamps, lab picoammeters, and utility kiloamperes share one ampere. A 20 mA loop is 0.02 A. Fuses are labeled in the prefix the catalog bought, not the one your meter displays.
- SI Coulomb Prefix ConverterCharge is current times time, but the unit still prefixes like the others. Battery milliamphours are a different dictionary (1 mAh = 3.6 C). Use this when a spec already wrote coulombs.
- SI Farad Prefix ConverterA one-farad cap is a small brick. Everyday ceramics are picofarads and nanofarads; electrolytics are microfarads. Datasheets hop prefixes without warning. Convert before you order the wrong reel.
- SI Gram Prefix ConverterMass prefixes attach to the gram, not the kilogram. Kilogram is already kilo + gram. Scale yottagram down to yoctogram, or milligram to microgram, without mixing in pounds. Jewelry carats and troy ounces are separate legal pages.
- SI Henry Prefix ConverterPower inductors are millihenrys. RF chokes are microhenrys. A 1 H inductor is an audio-era doorstop. Scale the prefix; this is not an impedance-at-frequency calculator.
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4.8
out of 5.0
4 reviews
Daniel R.
Feb 28, 2026
Very usable on mobile. Would love a save/export option later, but the math feels solid.
Priya S.
Feb 3, 2026
The FAQ section answered my questions before I even had to search. Smooth dark mode too.
Marcus L.
Jan 19, 2026
Simple inputs, clear outputs. This replaced three bookmarks I used to juggle.
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