Measurement method
- Tune the instrument and hold it in playing position.
- Capo the first fret.
- Hold the string at the last fret or neck/body joint.
- Measure the gap near the middle of the span with a feeler gauge.
Record where you measured and which string you used. A value alone does not prove that the truss rod should be adjusted.
Scope of this guide
A repeatable capo, last-fret, and feeler-gauge method for recording relief. Use How to Measure Neck Relief to make a repeatable decision for this named task, not to impose one specification on every instrument.
Practical example
For example, record “0.18 mm at fret 8, capo fret 1, string held at fret 17” rather than “slight relief.” Repeat the gap after tuning and positioning the guitar the same way; route a localized upper-fret buzz to fret/action inspection instead of assuming more curvature.
Record the conditions
For How to Measure Neck Relief, write down instrument type, tuning, installed strings, relevant hardware, climate when material, physical datum, unit, tool resolution, and the result before and after change. A result from this guide is comparable only when its method travels with the number.
Verification checklist
- For How to Measure Neck Relief, confirm the starting state and exact question.
- Repeat its critical measurements from the same reference.
- Compare its result with direct observation and applicable maker documentation.
- Change one reversible variable where the task permits.
- Retest the named symptom and preserve unresolved exceptions.
Related workflow
- neck relief measurement — continue when that page answers the next unresolved measurement or decision.
- fret buzz diagnostic — continue when that page answers the next unresolved measurement or decision.
Limits
How to Measure Neck Relief cannot inspect hidden structure, material condition, service history, or player technique. Stop this guide workflow for electrical hazards, abnormal resistance, structural movement, conflicting readings, or unplanned material removal.