Every wave obeys the wave equation: speed = frequency × wavelength. Choose what you want to find and enter the other two values. The calculator also gives the time period, the time for one complete wave to pass.
The equation works for any wave — sound, water waves, waves on a string, and light and radio waves (where v = 3 × 10⁸ m/s).
| Find | Wavelength (λ) |
| Frequency (f) | 440 Hz |
| Wave speed (v) | 343 m/s |
| Wave speed (m/s) | 343 |
| Frequency (Hz) | 440 |
| Wavelength (m) | 0.779545 |
| Time period (s) | 0.00227273 |
The sound wave has a wavelength of 0.779545 m.
Try this example →| Find | Wavelength (λ) |
| Frequency (f) | 100,000,000 Hz |
| Wave speed (v) | 299,792,458 m/s |
| Wave speed (m/s) | 299,792,000 |
| Frequency (Hz) | 100,000,000 |
| Wavelength (m) | 2.99792 |
| Time period (s) | 1e-8 |
The radio wave's wavelength is 2.99792 m.
Try this example →Wave speed = frequency × wavelength (v = fλ).
Hertz (Hz), meaning waves per second.
T = 1/f. A 50 Hz wave has a period of 0.02 s.
No. The frequency stays the same; the speed and wavelength increase.