Wavelength Calculator
Convert between frequency and wavelength.
Common Wavelengths
| Frequency | Wavelength | Band |
|---|---|---|
| 27 MHz | 11.1 m | CB Radio |
| 144 MHz | 2.08 m | 2m Amateur |
| 440 MHz | 68 cm | 70cm Amateur |
| 900 MHz | 33 cm | ISM/LoRa |
| 2.4 GHz | 12.5 cm | WiFi |
| 5.8 GHz | 5.2 cm | 5 GHz WiFi |
| 28 GHz | 10.7 mm | 5G mmWave |
Wavelength and Antenna Design
Basic Formula
λ = c / f
λ = wavelength, c = speed of light (299,792,458 m/s), f = frequency
λ = wavelength, c = speed of light (299,792,458 m/s), f = frequency
In free space, electromagnetic waves travel at the speed of light. Wavelength is inversely proportional to frequency.
Antenna Considerations
- Half-wave dipole: Most common resonant antenna
- Quarter-wave vertical: Ground-plane or mobile antenna
- 5/8 wave: Higher gain vertical antenna
- Velocity factor: Real antennas are ~5% shorter due to conductor effects