Reference library

Tools

Focused tools that connect guitar string mechanics to practical setup decisions.

By Guitar String Tension CalculatorReviewed 2026-08-09

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Using the tools library

Use focused calculators for tension, fret position, frequency, and scale length.
Enter measured instrument values instead of relying on model-name assumptions.
Treat each result as a setup comparison, then confirm the instrument physically.

Luthier tool / positions

Calculate fret positions, fret spacing, and printable measurement tables for any straight or multiscale guitar scale length.

Pitch tool / equal temperament

Convert guitar notes to frequencies and compare standard guitar string frequencies using an adjustable A4 reference.

Setup tool / scale comparison

Compare guitar scale lengths, estimate the tension change, and find an equivalent string gauge for a familiar feel.

Bass tool / four-string preset

Calculate four-string bass tension by gauge, note, and scale length, or solve an estimated gauge from a target tension.