A 12-string guitar has six pairs of strings, and each pair must be tuned to the same note
A 12-string guitar uses six pairs of strings instead of six single strings. The four thickest pairs (low E, A, D, and G) each have one thick string and one thin string tuned to the same pitch. The two thinnest pairs (B and high E) are both thin strings tuned to the same pitch. This doubled-string design creates the guitar's characteristic shimmering, fuller sound.
Tuning a 12-string is the same process as tuning a 6-string, but you repeat it for each pair. You tune the first string of each pair, then tune its partner to match. The standard tuning for a 12-string is identical to a 6-string: E, A, D, G, B, E (from thickest to thinnest). The main difference is that you have twice as many strings to get into tune, which takes longer and requires more patience.
The biggest challenge with 12-string tuning is that the thinner strings in each pair are under less tension than the thicker ones, so they drift out of tune faster. You will also notice that 12-strings are harder on your hands and fingers because the string tension is higher overall. This is normal and improves as your fingers build calluses.
Key Takeaways
- A 12-string guitar has six pairs of strings, with each pair tuned to the same note, creating a fuller, shimmering sound than a 6-string.
- Standard tuning for a 12-string is E-A-D-G-B-E, the same as a 6-string, but you tune each pair separately.
- A digital tuner designed for guitars makes the process faster and more accurate than tuning by ear.
- The thinner strings in each pair go out of tune more quickly, so you may need to retune every few days depending on how often you play.
- Tuning a 12-string takes 10 to 15 minutes when you are learning; experienced players can do it in 5 to 7 minutes.
Choose a tuner that works for 12-string guitars
A digital tuner is the fastest and most reliable way to tune a 12-string. You have three main types to choose from: clip-on tuners, pedal tuners, and smartphone apps. Clip-on tuners attach to the headstock of your guitar and sense vibrations directly from the wood, so they work even in noisy rooms. Pedal tuners sit on the floor and you plug your guitar cable into them; they are more expensive but very accurate. Smartphone tuner apps are free or cheap and work well if you have a quiet space to tune in.
Any tuner labeled for guitars will work on a 12-string. You do not need a special 12-string tuner. The tuner straightforward listens to each string and tells you whether it is sharp (too high), flat (too low), or in tune. Look for a tuner with a clear display and a needle or light that moves as you adjust the pitch. Clip-on tuners cost between $10 and $30 and are the most popular choice for home use.
If you want to tune by ear without a tuner, you can use a reference pitch from a piano, another guitar, or a tuning fork. This method takes much longer and requires a trained ear. Most players use a tuner, especially when learning.
Tune the thick string in each pair first
Start with the thickest string on the guitar, which is the low E string. Attach your tuner to the headstock or prepare your tuning app. Pluck the low E string firmly and watch the tuner display. Turn the tuning peg for that string slowly until the tuner shows that the string is in tune. The tuner will display the note name (E) and a needle or light that shows whether you are sharp or flat. Turn the peg toward you to loosen the string (lower the pitch) or away from you to tighten it (raise the pitch).
Once the low E is in tune, move to the A string, then the D string, then the G string, then the B string, and finally the high E string. Tune each thick string in the pair before moving to its thin partner. This order matters because it helps you develop a consistent tuning routine and reduces the chance of missing a string.
Work slowly and make small adjustments. If you turn the tuning peg too far, the string will jump from flat to sharp and you will have to start over. It is better to approach the correct pitch gradually from below (flat) than to overshoot it.
Tune the thin string in each pair to match
Once the thick string in a pair is in tune, pluck the thin string next to it. This thin string should be tuned to the exact same note as the thick string. Watch your tuner as you adjust the thin string's tuning peg. The thin strings are usually easier to tune because they require less force to change pitch, but they also drift out of tune more easily once you are done.
Repeat this process for all six pairs: tune the thick string, then tune its thin partner to match. By the time you finish the high E pair, all 12 strings should be in tune. Pluck each string one more time to double-check. If any string has drifted, retune it and check again.
The thin B and high E strings are both thin, so there is no "thick" and "thin" distinction in those pairs. straightforward tune both strings in each pair to the same pitch. The tuner will show you the note name (B or E) for both.
Stretch the strings after tuning to keep them stable
New strings and newly tuned strings tend to slip and go flat within minutes. To prevent this, gently stretch each string by pulling it away from the fretboard with your fingers. Start at the headstock and work your way down toward the body. Use moderate pressure—you are not trying to break the string, just help it settle into the tuning peg and bridge.
After stretching, check the tuner again. You may find that some strings have gone flat slightly. Retune them and stretch again. Repeat this process two or three times until the strings hold their pitch. This takes an extra 2 to 3 minutes but saves you from having to retune every time you play.
New strings need more stretching than old strings. If you just installed a fresh set of 12-string strings, expect to stretch and retune several times over the first few hours of playing. After a few days, the strings will stabilize and hold their tuning much better.
Retune every few days or before you play
A 12-string guitar goes out of tune faster than a 6-string because of the extra string tension and the thinner strings in each pair. If you play regularly, retune before each session. If you play only once or twice a week, a quick retune at the start of your session takes just a few minutes and ensures you sound your best.
Temperature and humidity changes also affect tuning. If you move your guitar from a cold room to a warm one, or if the air becomes much drier or more humid, the wood expands or contracts slightly and the strings go flat or sharp. This is normal. Keep your guitar in a stable environment when possible, and retune after any big temperature shift.
Store your 12-string in a case or gig bag when you are not playing. This protects the strings from dust and damage and helps them hold their tuning longer. A guitar left out in the open air dries out faster and goes out of tune more quickly.
Frequently Asked Questions
Why does my 12-string go out of tune so fast?
The thin strings in each pair are under less tension than the thick strings, so they slip in the tuning pegs more easily. New strings also need time to settle. Stretch your strings after tuning and retune before each playing session. If one string keeps going flat, the tuning peg may be worn or the string may be damaged.
Can I use a 6-string tuner on a 12-string?
Yes. Any guitar tuner works on a 12-string because it straightforward listens to the pitch of each string. You do not need a special 12-string tuner. The tuner does not care how many strings your guitar has.
What is the difference between tuning the thick and thin strings in a pair?
The thick string in each pair (except B and high E) is easier to tune because it requires more force to change pitch, so you have better control. The thin string is easier to overshoot. Tune the thick string first, then match the thin string to it. Both should show the same note on your tuner.
How long should tuning take?
When you are learning, expect 10 to 15 minutes. As you practice, you will get faster. Experienced players can tune a 12-string in 5 to 7 minutes. The first time you tune a new guitar may take longer because you are learning where each tuning peg is.
Do I need to tune a 12-string differently than a 6-string?
No. The tuning process is identical—you just do it twice, once for each string in the pair. Use the same tuner, the same tuning order (E, A, D, G, B, E), and the same technique. The only difference is that you have 12 strings instead of 6.