Frequency converter
Converts frequencies: Hz, kHz, MHz, GHz, and drift rates in ppm or ppb per year.
2.4 GHz is 2,400 MHz.
- Input
Provenance
- Computed by
- units.frequency.convert 1.0.0, core 0.1.0
- Model
- Exact unit definitions
- Accuracy
- Exact to double precision: each conversion is one correctly rounded ratio of exact definitions
- Notes
- None
- Cites
- National Institute of Standards and Technology, Guide for the Use of the International System of Units (SI), NIST Special Publication 811
Something look off?
How we got thisFormula, worked example, sources, and proof
Model: Exact unit definitions
Accuracy: Exact to double precision: each conversion is one correctly rounded ratio of exact definitions
When to use this: Use this for a radio or clock frequency that has to move between prefixes -- a 2.4 GHz link in MHz, an emergency frequency of 121.5 MHz in kHz, a 433 MHz beacon in Hz -- or for an oscillator drift rate quoted in parts per million or billion per year.
Limitations: The prefixes are decimal: a megahertz is a million hertz, not 2^20. That is the SI meaning and the one radio has always used, but software that quotes storage in binary multiples can make it look otherwise, and the two differ by 4.9% at mega. The year behind ppm/yr and ppb/yr is the Julian year of exactly 365.25 days. A frequency is not a wavelength either: turning one into the other needs a propagation speed, which is not an input here.
Worked example: 2.4 GHz in MHz. Source: Exact unit definitions (NIST SP 811 Appendix B). It is golden test vector v001, and every build checks the tool still gives its answer within its tolerance.
You enter
- To unit
- MHz
- Value
- 2.4 GHz
You get
- Converted
- 2,400 MHz
- Input
- 2.4 GHz
Review: Not yet independently reviewed by a metrologist.
Last verified: 2026-09-18, when a maintainer last confirmed this tool's sources at the issuer. See the sources ledger.
Status: version 1.0.0, core 0.1.0. See this tool in the verification report.
Checked against: 40 golden test vectors (download the test vectors, each with its source and tolerance). See how results are checked and every source.
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, National Institute of Standards and Technology, 2008 edition. Appendix B.8, Factors for units listed alphabetically.