Wavelength & Frequency Calculator

Convert between wavelength and frequency. Calculate photon energy and identify the electromagnetic spectrum band.

Convert From

Value

Unit

Wavelength

12.49 cm

Frequency

2.4 GHz

Photon Energy (J)

1.590e-24

Energy (eV)

9.927e-6

EM Spectrum Band

Microwave

How to Use This Calculator

Enter a value in either field to instantly convert between units. The conversion is bidirectional — updating one side automatically recalculates the other.
Convert From — Calculation mode to use. Choose from: Frequency → Wavelength, Wavelength → Frequency. default: 0.
Value — The input value. Accepts values from 0 to 999,999,999 (default: 2,400).
Unit — Measurement system to use. Choose from: Hz / m, kHz / cm, MHz / mm, GHz / μm, THz / nm. default: 2.
Once all inputs are set, review your results in the Results panel. Here's what each output means:
Wavelength — your calculated result. This is the primary result of this calculator.
Frequency — your calculated result.
Photon Energy (J) — your calculated result.
Energy (eV) — your calculated result.
EM Spectrum Band — your calculated result.
Explore the related calculators below if you need deeper analysis or want to approach this topic from a different angle.

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Formula

c = λf, E = hf

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