GuitarMath builds the calculators guitarists actually reach for: how much power a pedalboard needs, what a new string gauge will feel like, where the capo goes.
How we build the tools
- Real formulas. Fret positions, frequencies and delay times come from standard physics and twelve-tone equal temperament with A4 = 440 Hz. Each tool shows its formula.
- Published specs. Pedal power draws and string unit weights come from the makers' own spec sheets and manuals, linked on each page. If a maker doesn't publish a number, we leave the pedal out rather than guess.
- No signup. Everything runs in your browser. Your settings are saved on your own device.
Spotted an error?
Specs change and pedals get revised. If a number looks wrong, tell us and we'll check it against the source and fix it.
Last updated November 14, 2026.