How it works
This is the string tension calculation run in reverse. For your scale length and pitch it steps through common gauges of the chosen material, works out the tension of each, and lists the ones that fall in the light, medium or heavy feel band.
When it helps
- Alternate tunings and baritone conversions: keep the feel you like after dropping or raising the pitch.
- Different scale lengths: find equivalent gauges when moving between, say, 24.75" and 25.5".
- Custom sets: choose each string so the tension is balanced across the neck.
- Extended-range instruments: pick suitable low strings for 7, 8 and 9-string guitars and 5 and 6-string basses.
Instrument presets
Use the instrument picker to load a full set of strings for guitars, basses, ukuleles and mandolin, then adjust any string. Once you have a gauge, check it in the string tension calculator and the bridge compensation calculator.
Frequently asked questions
What is string gauge?
Gauge is the diameter of the string, usually given in thousandths of an inch. A .010 string is 0.010" (0.254 mm) across. For wound strings the gauge is the overall diameter including the winding.
How do I choose a gauge for a lower tuning?
Lower pitch means lower tension at the same gauge, so you need a thicker string to keep the same feel. Enter the new pitch and pick the gauge that gives your target tension.
Are the gauge suggestions exact?
They are estimates based on physics-based unit weights. Use them to narrow the choice, then confirm against the maker's published tension for the exact set you plan to buy.