How to Tune a Classical Guitar
Tuning a classical guitar takes a little more attention than tuning a steel-string acoustic. Nylon strings are considerably more elastic than steel — they stretch more, drift more with temperature and humidity changes, and take longer to settle after fitting. With the right method, getting your classical guitar in tune takes under two minutes. Here is everything you need to know.
Standard Tuning: E A D G B E
A classical guitar in standard tuning is tuned from the lowest (thickest) string to the highest (thinnest): E — A — D — G — B — E. The sixth string (lowest) sounds E2; the first string (highest) sounds E4. This is identical to the standard tuning of steel-string acoustic and electric guitar, so any tuner or tuning app designed for guitar will work.
A useful mnemonic for the string names: Every Amateur Does Get Better Eventually (E-A-D-G-B-E, from lowest to highest).
The Most Reliable Method: Clip-On Chromatic Tuner
For most players in most situations, a clip-on chromatic tuner is the most practical and accurate choice. It clips to the guitar's headstock and reads the pitch through vibration in the wood rather than through a microphone — so it works accurately even in noisy environments like orchestras, ensembles, or backstage at a concert. The display shows you the note name and how sharp or flat the string is; you turn the tuning peg until the needle centres on the target note.
To tune with a clip-on tuner:
- Clip the tuner to the headstock.
- Pluck one open string and allow it to ring for a moment.
- Watch the display and turn the tuning peg slowly in the right direction.
- Turn to approach the correct pitch from below (tune up) if possible — approaching from above and letting back tends to settle less reliably.
- Repeat for each string, working from the 6th string (E) to the 1st (E).
- Do a second pass — adjusting one string can slightly affect the tension on others.
Tuner Apps on a Smartphone
A tuner app on a smartphone is a perfectly good alternative, particularly in a quiet room. The app uses the phone's microphone to detect pitch; accuracy is good enough for practice and most performance situations. The main limitation is that a phone microphone picks up all ambient sound, which can cause inaccurate readings in noisy environments. For home practice, a tuner app works well and costs nothing.
Tuning by Ear: The Fifth-Fret Method
Once one string is in tune — usually the fifth string (A), matched to a reference pitch from a piano, tuning fork, or reference recording — the remaining strings can be tuned relative to it using the fifth-fret method:
- 6th string fretted at the 5th fret → matches open 5th string (A)
- 5th string fretted at the 5th fret → matches open 4th string (D)
- 4th string fretted at the 5th fret → matches open 3rd string (G)
- 3rd string fretted at the 4th fret → matches open 2nd string (B) — note: 4th fret, not 5th
- 2nd string fretted at the 5th fret → matches open 1st string (E)
This method trains the ear alongside the tuning habit, which is valuable long-term. Its limitation is that small errors accumulate across the strings; if the starting pitch is slightly off, the final string may be significantly mistuned. For critical situations — concerts, recordings — an electronic tuner is more reliable.
Harmonics Tuning Method
A refinement used by experienced players: comparing the harmonics produced at the 12th and 7th frets of adjacent strings. Harmonics are pure tones without the string's characteristic timbre, making small pitch differences easier to hear. This method is more accurate than the fifth-fret method but requires the ability to produce clean harmonics, which develops with practice.
Why Classical Guitars Go Out of Tune
Classical guitars go out of tune more readily than steel-string guitars for several reasons:
- Nylon stretches. Nylon has much greater elasticity than steel. New strings can take one to two weeks of regular playing to fully settle; during this period, the guitar needs retuning every few minutes at first, then progressively less often. Old strings that have been sitting on the guitar for months can stretch slightly if the guitar is left in a warm room.
- Temperature and humidity. Nylon is more sensitive to environmental changes than steel. Bringing a cold guitar into a warm room — or a warm guitar outside in winter — can cause significant pitch shifts. Allow the guitar to acclimatise to the room before tuning.
- Nut and saddle slots. If the nut slots (at the headstock end) are too tight, the string can bind and release suddenly as you tune, causing unstable pitch. A luthier can widen narrow slots easily.
- Tuning machine quality. Low-quality tuning machines can slip. On a classical guitar, the tuning machines (also called machine heads or pegs) are geared roller mechanisms; worn gears or loose screws can cause pitch drift. Check that all screws are tight and that the gears feel firm with no slop.
Always Tune Up to Pitch
A reliable habit: always approach the correct pitch from below, not above. When you overshoot the target pitch and tune back down, the gears can have slight play that makes the pitch unstable. If you overshoot, drop below the target and tune up again. This is especially important with nylon strings, which are more susceptible to this kind of instability.
Before Important Performances
Before a concert or important performance, tune in the following sequence:
- Allow the guitar to acclimatise to the performance space for at least 15–30 minutes.
- Tune carefully with the electronic tuner while backstage.
- Retune again when you are about to walk on stage — temperature and the act of playing can shift pitch.
- Be prepared to make small adjustments between pieces if necessary, particularly if the hall is hot or you have been playing vigorously.
FAQ
What is the standard tuning for a classical guitar?
E-A-D-G-B-E from lowest (thickest) to highest (thinnest) string — the same as all standard guitar tuning.
Why does my classical guitar go out of tune so quickly?
Nylon strings are more elastic and more sensitive to temperature and humidity than steel strings. New strings may take one to two weeks to fully settle; older strings in a changing environment will drift more than steel strings do.
What is the best way to tune a classical guitar?
A clip-on chromatic tuner on the headstock is the most reliable method, working in noisy environments as well as quiet ones. Always tune upward to pitch rather than tuning down to it.
How long do new nylon strings take to hold their tuning?
Typically one to two weeks of regular playing before the tuning is fully stable. Gently stretching each string when fitting can accelerate this process.
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