Station Utilities
Free HAM Radio Tools
Practical calculators and reference tools for amateur radio operators. All free, no sign-up required.
Frequency ↔ Wavelength Calculator
Convert between frequency and wavelength instantly. Identifies ham bands and calculates dipole lengths.
SWR Calculator
Calculate SWR, return loss, and reflected power from your forward and reflected readings. Visual meter with zone indicators.
Dipole Antenna Calculator
Calculate half-wave dipole, quarter-wave vertical, and full-wave loop antenna lengths. Imperial and metric with wire diagrams.
Coax Cable Loss Calculator
Estimate signal loss through common coaxial cable types at your operating frequency. Compare RG-58, RG-213, LMR-400, and more.
Ham Radio Range Calculator
Estimate your VHF/UHF simplex range based on power, antenna height, gain, frequency, and terrain type.
Ham Band Chart
Interactive US amateur radio band chart with frequency allocations, licence class filtering, and free PDF download.
EIRP Calculator
Calculate effective isotropic radiated power from transmitter power, antenna gain, and feed line loss. Includes antenna presets and ERP conversion.
Ham Radio Budget Calculator
Calculate your total ham radio setup cost. Interactive builder with current prices for radios, licence fees, and accessories.
Q Codes Reference
Searchable reference of all ham radio Q codes with plain-English meanings, usage examples, and the NATO phonetic alphabet.
Practice Quiz
10-question sampler from the Technician exam question pool. Instant feedback and scoring to check your exam readiness.
FCC ID Lookup
Look up any FCC equipment authorization by ID. See certification status, authorized frequencies, rule parts, and grant dates.