Calculators & reference
Tools
Small things worth having bookmarked. All of them run in your browser — nothing is sent anywhere.
Band Plan Lookup
Enter a frequency and your license class. Tells you whether you may transmit there, on what, and at what power.
Antenna Length Calculator
Dipole, end-fed half-wave, quarter-wave vertical, full-wave loop and 5/8 wave, in feet, inches and metres.
Grid Square Calculator
Coordinates to Maidenhead and back, plus distance and bearing between two grids. Runs entirely in your browser.
Reference Tables
Band plans, digital mode frequencies, ITU phonetics, RST signal reports, Q-codes and license class privileges — the things worth having in one place.