How to Convert Frequencies
Enter the value you want to convert in the Value field.
Select the unit you are converting from in the From list.
Select the unit you want to convert to in the To list.
The result updates instantly as you type or change units.
Key Features
35 Units Covered
Includes the complete SI hertz prefix range from attohertz to exahertz, cycle/second, and 17 wavelength units spanning nanometres to exametres plus Compton wavelengths for the electron, proton, and neutron.
Linear & Inverse Conversion
Frequency units convert via direct ratio (Hz base). Wavelength units use the reciprocal relationship f = c/λ, so you can freely mix frequency and wavelength units in a single conversion.
Scientific Notation for Extreme Values
Results outside the range 1×10⁻⁶ to 1×10¹⁵ are displayed in scientific notation automatically, keeping output readable for conversions involving Compton wavelengths or exahertz.
Works Offline
All conversions run in your browser using JavaScript. No internet connection is needed after the page loads.
Privacy & Security
This tool runs entirely in your browser. No values are transmitted to any server, stored, or logged. It is safe to use in offline environments or with sensitive measurements.
Frequently Asked Questions
How are frequency and wavelength related?
Frequency and wavelength are inversely proportional: f = c / λ, where c is the speed of light (299,792,458 m/s). A longer wavelength means a lower frequency and vice versa.
Can I convert between a frequency unit and a wavelength unit?
Yes. Select any hertz-based unit as the source and any wavelength unit as the target (or vice versa). The converter applies the f = c/λ relationship automatically.
What is the base unit for linear conversions?
The hertz (Hz) is the base unit. Each linear unit is defined by its exact multiplier relative to hertz. Wavelength units use the reciprocal formula f = c/λ to reach the hertz base.
What is a Compton wavelength?
The Compton wavelength is a quantum mechanical property of a particle equal to h/(mc), where h is Planck's constant and m is the particle's mass. The electron Compton wavelength is approximately 2.426×10⁻¹² m.
Why does the result show scientific notation?
Scientific notation is used automatically when the result is smaller than 1×10⁻⁶ or larger than 1×10¹⁵, which often happens when mixing extreme units such as attohertz and exahertz, or Compton wavelengths and exametres.