Wavelength Calculator

Frequency to wavelength — λ=c/f

Quick Answer

Wavelength Calculator: Frequency to wavelength — λ=c/f. Wavelength Calculator uses standard science & engineering formulas to compute accurate results instantly.

Medium / wave speed

Frequency f (MHz)

Wavelength λ

2.9979 m

Frequency100.000 MHz

Wavelength2.9979 m

Period T10.0000 ns

Electromagnetic spectrum band

Radio

Calculation steps

1λ = v / f = 299,792,458.000000 m/s ÷ 100.000 MHz
2λ = 2.9979 m

Electromagnetic spectrum reference
Band	Frequency	Wavelength
Radio	< 3 GHz	> 10 cm
Microwave	3–300 GHz	1 mm – 10 cm
Infrared	300 GHz – 430 THz	700 nm – 1 mm
Visible	430–770 THz	390 – 700 nm
Ultraviolet	770 THz – 30 PHz	10 – 390 nm
X-ray	30 PHz – 30 EHz	0.01 – 10 nm
Gamma	> 30 EHz	< 0.01 nm

Formula

v = f × λ (wave speed = frequency × wavelength). Light in vacuum c = 299,792,458 m/s; sound in air ≈ 343 m/s at 20°C (≈ 331 + 0.6×T). FM radio ≈ 100 MHz → λ ≈ 3 m.

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How to Use

Enter known quantities: fill values and confirm units in the Wavelength Calculator.
Instant solution: unknowns solve live with the formula shown transparently.
Use constant/material tables: standard physical constants and material data are listed on this page.
Compare conditions: change inputs to compare scenarios.

Key Points

Wavelength Calculator is a free online science & engineering tool — open and use, no sign-up.
All calculations run locally in your browser; your data never leaves the device.
Key capability: Frequency to wavelength — λ=c/f.
Results come with formulas and reference tables so you can verify every number.

Formula & How It Works

Wavelength Calculator formula

Wavelength Calculator uses standard science & engineering formulas to compute accurate results instantly.

FAQ

How do I use the Wavelength Calculator?

Open the page and fill in the input fields — results update automatically. Frequency to wavelength — λ=c/f.

Are the results accurate?

Yes. Standard formulas and conversion factors are used and verified.

Is it free? Do I need to sign up?

Completely free. No registration, login or download required.

Does it work on mobile?

Yes. The responsive design works on phones, tablets and desktops.

Is my data saved?

No. Everything runs locally in your browser.

Related Guides

Source & Updates

Based on CODATA recommended constants and standard physics formulas. Last updated: 2025-07

Last updated: 2026-08-03

Formulas and content on this page are reviewed by the YiJianSuan team. For reference only — official sources prevail.

Cite this page: YiJianSuan. Wavelength Calculator[EB/OL]. https://www.yijiansuan.com/en/c/science/wavelength

Results provided by this tool are for reference only and do not constitute professional advice.