Skip to content
ENExplore Calculators

Wavelength To Frequency (Radio) Calculator

Work out wavelength to frequency (radio) instantly with clear inputs, formula shown and shareable results.

About Wavelength To Frequency (Radio) Calculator

Wavelength times frequency equals the propagation speed, so lambda = c/f. In free space 300 MHz corresponds to 1 metre, giving the useful shortcut that wavelength in metres is roughly 300 divided by frequency in MHz. Inside a cable or dielectric the velocity factor shortens the wavelength proportionally.

Formula

Wavelength

lambda = c x velocity factor / f; in free space lambda(m) = 300 / f(MHz)

Worked example

With the default values below, Wavelength To Frequency (Radio) Calculator returns Result of 0.12491. Change any input above and every figure here is recalculated in your browser.

Inputs used

Value
2.4
Convertone of Frequency (GHz) to wavelength, Wavelength (m) to frequency
Frequency (GHz) to wavelength
Medium velocity factor
1

Results

Result
0.12491
Wavelength
0.12491 m
Frequency
2,400.00 MHz
Quarter wavelength
3.12 cm

Step by step

  1. 1Values used
  2. 2Wavelength
  3. 3Result= 0.12491
  4. 4Wavelength= 0.12491 m
  5. 5Frequency= 2,400.00 MHz
  6. 6Quarter wavelength= 3.12 cm

Assumptions and limits

  • The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 5 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • Electrical results are planning estimates only. Verify against the applicable wiring rules (IEC 60364, BS 7671, NEC or local code) and have all installation work designed and checked by a qualified electrician.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Electrical results are planning estimates only. Verify against the applicable wiring rules (IEC 60364, BS 7671, NEC or local code) and have all installation work designed and checked by a qualified electrician.

Frequently Asked Questions

Why does velocity factor matter?

Signals travel slower in dielectrics, so a quarter-wave stub in coax with velocity factor 0.66 is a third shorter than its free-space length.

What wavelength is 2.4 GHz?

About 12.5 cm, which is why Wi-Fi antennas are small and why a quarter-wave element is only about 3 cm.

Related Calculators

Wavelength To Frequency (Radio) Calculator | Calcrivo