Band Plan: Ham Radio Toolkit

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Radio Toolkit is the reference and calculator set a US amateur radio operator reaches for at the bench, in the truck, or in a field with no signal — encoded from the current FCC rules and the standard handbook formulas, and kept entirely on your device.

BAND PLAN
• Every US amateur band from 160 meters to 23 centimeters, drawn as a bar you can read at a glance.
• Pick Technician, General or Amateur Extra and see exactly where you may transmit, in what modes, at what power — from 47 CFR Part 97, with the section cited on every segment.
• Tap any frequency to see who may use it and what convention applies there.
• The voluntary ARRL band-plan conventions and calling frequencies, clearly labelled as conventions rather than rules.
• Includes the December 2025 changes to 60 meters.

REFERENCE
• Q-codes with both the question and statement forms, browsable and searchable by meaning ("location" finds QTH).
• RST signal reports with a decoder: type 579, read what it means.
• CW abbreviations and prosigns, with the Morse.
• The ITU phonetic alphabet, with a callsign speller: type W1AW/7, read or hear "Whiskey One Alfa Whiskey Stroke Seven".
• The three ITU regions and what they mean for a US operator.

ANTENNA CALCULATORS
• Half-wave dipole, inverted V, quarter-wave vertical with radials, full-wave loop (square, delta or circle) and J-pole.
• Frequency in, lengths out in feet-and-inches and metric, with adjustable end-effect constant and wire velocity factor.
• Every calculator shows its formula and its assumptions. Cut long and trim — the app says so.

RF MATH
• dB to power and voltage ratio and back; dBm to watts and back.
• SWR from forward and reflected power; return loss, mismatch loss and reflected power for any SWR.
• Coax loss for 15 common lines (RG-58, RG-8X, RG-213, LMR-240, LMR-400, LMR-600, Heliax, ladder line and more) at any frequency and length, with the power that actually reaches the antenna.
• ERP and EIRP from transmitter power, feedline loss and antenna gain.

SAVED
• Save any calculation with its inputs; bookmark any code, band or abbreviation. Export everything as CSV or JSON at any time.

PRIVATE BY CONSTRUCTION
The app has no server and makes no network connections. It requests no permissions — check the permissions list. Everything you enter stays on your device.

Radio Toolkit is a reference. 47 CFR Part 97 as published by the FCC (https://www.ecfr.gov/current/title-47/part-97) is the only authority on what you may transmit. The band plan was encoded from the eCFR text on the date shown in Settings, and the FCC changes it from time to time. ARRL is a registered trademark of the American Radio Relay League, Inc., which is not affiliated with and does not endorse this app. Not affiliated with the FCC or any government entity.