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Calculators / Science / Frequency and wavelength
Frequency and wavelength calculator
Calculate wavelength from frequency and propagation speed.
On this page
Wavelength3m
Period1.00e-8s
Calculator controls
How to calculate
Calculate wavelength from frequency and propagation speed.
wavelength = propagation speed ÷ frequency; period = 1 ÷ frequency
Worked example
Frequency (Hz): 100000000; Propagation speed (m/s): 299792458.
Wavelength: 3 m; Period: 1.00e-8 s.
Assumptions and limits
Use the propagation speed for the actual medium. Electromagnetic waves travel more slowly in cables and materials than in vacuum.
Results are rounded for display; calculations use unrounded values. Read our calculation methodology.
Understanding the result
Calculate wavelength from frequency and propagation speed. The result follows the displayed formula and keeps every adjustable assumption visible.
When this tool is useful
Use this tool to plan quantities or compare scenarios before making a purchase or technical decision.
Understanding your inputs
| Input | What to enter |
|---|---|
| Frequency (Hz) | Enter a number of at least 0.000001 and no more than 1000000000000. |
| Propagation speed (m/s) | Enter a number of at least 0.000001 and no more than 1000000000000. |
Frequently asked questions
What can change the frequency and wavelength result?
Use the propagation speed for the actual medium. Electromagnetic waves travel more slowly in cables and materials than in vacuum.
Should I round the inputs first?
No. Enter the best measurements available and round only the practical final quantity, such as full packs, boards, sheets, or components.