Ham Radio Tools
Calculators, references, and utilities for amateur radio operators
Antenna Calculator
Calculate dipole, vertical, and other antenna dimensions. Supports metric and imperial units.
Choke Calculator
Build the perfect 1:1 choke balun or line isolator. Recommends toroid core, turns, and wire for your bands and power.
Band Plan Reference
Interactive band plan charts. Customize by license class and preferred bands.
Satellite Pass Predictor
Track amateur radio satellites. Get pass times and frequencies for your location.
Contest Calendar
Upcoming ham radio contests and special events. Never miss a contest again.
Repeater Search
Find repeaters near you. Filter by band, mode, and features.
Hamfest Locator
Discover hamfests and swap meets in your area. Plan your next radio adventure.
Callsign Lookup
Look up US amateur radio callsigns. Get license info, grid square, and more.
Radio Prices
Compare ham radio equipment prices across vendors. Find the best deals.