The Essential Guide to Perfect DIY Intonation
We’ve all been there. You’ve just put on a fresh set of strings, spent ten minutes tuning every open string perfectly, and you strike a beautiful G-major chord—only for it to sound "sour" or slightly off. The culprit is almost always your guitar intonation.
You check your tuner again. Everything is green. So why does your guitar sound like it’s fighting you as you move up the neck?
Think of tuning as setting the pitch, and intonation as making sure those notes stay accurate all the way up the fretboard.
If your guitar was a car, tuning the open strings would be like checking the tire pressure. Intonation is the alignment. If the alignment is out, it doesn't matter how much air is in the tires—you’re still going to pull to the left. This guide will show you how to get your "alignment" studio-ready.
Intonation is always the final step of a guitar setup. Adjusting these factors first ensures your readings are accurate.
Old strings develop 'flat spots' and lose their ability to vibrate consistently. If your strings have been on for more than a few weeks, change them before starting.
Brand new strings need to be broken in. After you string up, gently tug each string away from the fretboard several times along its length, then retune.
Pro Tip: If freshly tuned new strings sound out of tune the moment you start playing, they haven't been stretched enough. Repeat the process until the pitch holds firm.
Hold a note firmly with your fretting hand at the lower frets while stretching to avoid damaging the nut or tuning pegs.
Before you touch a bridge screw, ensure your tool is a perfect match. Most bridges use a small flathead or a #1 Phillips.
We use the Pocket Luthier Intonator to compare your open string frequency to the fretted note at the 12th fret. This ensures the guitar is perfectly compensated for your actual playing style.
| If the 12th Fret is... | Think... | Action |
|---|---|---|
| FLAT (Too Low) | Follow the Flat | Move Saddle FORWARD (Toward Neck) |
| SHARP (Too High) | Slide it BACK | Move Saddle BACK (Toward Tailpiece) |
🚨 Important: Every time you move a saddle, the tension of the string changes. You must retune the open string to pitch before checking the 12th fret again!
Don't worry if you are like me and keep forgetting which way to move the saddle. Our state-of-the-art Guitar Intonation Tool will guide you through the process step-by-step!
If you're working on a Tune-O-Matic bridge (Gibson, Epiphone, and similar), we have a dedicated guide covering saddle flipping, Nashville vs ABR-1 identification, and bridge rattle fixes.
If you're working on a 6-saddle Strat, Tele, or modern hardtail, our dedicated guide covers saddle leveling, spring bind fixes, and the full adjustment workflow.
If you're working on a Telecaster-style 3-saddle bridge, our dedicated guide covers the balance method, witness point setting, and shared string pair management.
Double-locking systems require a unique workflow — bridge leveling, saddle safety, and fine tuners all play a role. Our dedicated guide covers it step by step.
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