Frequency Wavelength Calculator
Convert between frequency and wavelength.
Enter your values
Enter the frequency in Hz.
Choose one of: Sound in air (343 m/s), Light (c), Sound in water.
Enter the custom speed (m/s) you are working with.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Wavelength
- 0.779545 m
- In centimetres
- 77.9545
- Wave speed used
- 343 m/s
- Period
- 0.00227273 s
- Wavenumber
- 1.282799 1/m
Quick answer
Wave speed equals frequency times wavelength, so raising one lowers the other at fixed speed.
v = f × λ
At a glance
| What it does | Convert between frequency and wavelength. |
|---|---|
| Category | Science |
| Inputs needed | Frequency, Wave speed, Custom speed (m/s) |
| Formula | v = f × λ |
| Cost | Free — no sign-up, no download |
How to use the Frequency Wavelength Calculator
- 1Enter the wave frequency in hertz.
- 2Pick the medium or enter a custom speed.
- 3Read the wavelength and period.
Inputs explained
- Frequency(Hz)
- Enter the frequency in Hz.
- Wave speed
- Choose one of: Sound in air (343 m/s), Light (c), Sound in water.
- Custom speed (m/s)
- Enter the custom speed (m/s) you are working with.
Frequently asked questions
What is the wavelength of A440?
About 0.78 m in air at room temperature.
Does temperature affect sound speed?
Yes — roughly +0.6 m/s per °C.
What do I need to enter into the Frequency Wavelength Calculator?
Just 3 values: frequency, wave speed, custom speed (m/s). Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Frequency Wavelength Calculator work out the answer?
Wave speed equals frequency times wavelength, so raising one lowers the other at fixed speed. It applies the formula v = f × λ and shows the working so you can check each step by hand.
Is the Frequency Wavelength Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.