String Action Reference Chart

Printed from The BadMonkey Workshop, badmonkeymusic.com/workshop/

String action is the distance between the strings and the frets. Players usually think of it as “how high the strings feel.” Techs think of it as one part of a larger setup system. Action depends on relief, fret condition, nut height, bridge geometry, string gauge, tuning, scale length, radius, and the way the player attacks the guitar.

Charts are useful, but they are not law. The right number is the number that works on the instrument in front of you.

Common starting points

Measured at the twelfth fret, many electric guitars land somewhere around 4/64 inch on the high E and 5/64 inch on the low E as a general starting point. Some players go lower. Some need higher. Aggressive players, slide players, heavy strings, and down-tuned guitars may need more room.

Acoustic guitars often need more height because the strings move more and the instrument has to drive a top. A common starting area might be around 5/64 inch on the high E and 6/64 to 7/64 inch on the low E, depending on the guitar and player.

Bass guitars vary widely. A light-touch player may want a lower setup with some controlled fret sound. A hard player may need more clearance to keep the note strong.

Why your guitar may not match the chart

If the frets are uneven, low action may not be possible without buzz. If the neck has too much relief, the middle of the neck may feel high even if the twelfth-fret number looks normal. If the nut slots are too high, the guitar may feel stiff in first position even with low bridge action.

This is why action should be measured after relief is checked and after the guitar is tuned to pitch with the correct strings.

Low action tradeoffs

Low action feels fast, but it leaves less room for the string to vibrate. That can mean more fret noise, less acoustic volume, choking bends, or less dynamic headroom. Some players are fine with that. Some are not.

The best low setups usually require good fretwork. The lower you want the strings, the more accurate the fret plane has to be.

High action tradeoffs

Higher action can sound clean and strong, but it can also make the guitar harder to play. High action can pull fretted notes sharp, tire the hand, and hide other problems. If the action must be very high to avoid buzz, the guitar may need fretwork, neck angle evaluation, or other repair.

Use action numbers as a conversation

Action measurements are a starting conversation between the guitar and the player. The final decision is made by feel, sound, tuning, and how the guitar performs under the player's hands.