All Tools
Fourteen focused utilities for daily ham radio operating. Every tool runs entirely in your browser.
Convert between frequency and wavelength across Hz, kHz, MHz, GHz.
Element lengths for dipole, quarter-wave vertical, and full-wave loop antennas.
Standing wave ratio, reflection coefficient, return loss, and mismatch loss.
Convert between GPS coordinates and 4/6-character Maidenhead grid squares.
Estimate HT/mobile radio runtime from capacity, TX power, RX current, and duty cycle.
Text ↔ Morse with adjustable speed and audible playback in the browser.
Spell text with the ICAO/NATO phonetic alphabet used on radio.
Compose standard R-S-T signal reports with plain-English descriptions.
Standard TX offsets for 10 m, 6 m, 2 m, 1.25 m, 70 cm and 33 cm bands.
Search HF/VHF/UHF amateur band allocations with mode and privilege notes.
Search common Q-codes with definitions and on-air usage examples.
Log QSOs in your browser and export to ADIF/CSV — nothing leaves your machine.
Search ITU-allocated call sign prefixes by country or by leading characters.
Estimate minimum safe distance from an antenna using FCC Part 97.13 formulas.