How to Tune a Banjo
A banjo that’s out of tune sounds awful no matter how well you play it. The good news: tuning a 5-string banjo is straightforward once you know the target notes and a reliable method to reach them.
This guide covers standard open G tuning, how to tune with an electronic tuner and by ear, alternate tunings for different styles, and tuning for 4-string and 6-string banjos.
Open G tuning: the standard 5-string setup
The 5-string banjo is tuned to open G by default. When you strum all five strings without fretting any notes, you hear a G major chord. The notes from the 5th string to the 1st string are:
| String | Note | Description |
|---|---|---|
| 5th (short string, closest to your face) | g | High G, played by the thumb |
| 4th | D | Low D |
| 3rd | G | Low G (one octave below the 5th string) |
| 2nd | B | B |
| 1st (closest to the floor) | D | High D (one octave above the 4th string) |
The shorthand is gDGBD. Only three distinct pitches make up this tuning --- G, B, and D --- which are the notes of a G major chord.
If you’re brand new to the instrument and still getting familiar with the parts, know that the 5th string starts at the 5th fret, not the headstock. It has its own tuning peg mounted partway up the neck.
How to tune a banjo with an electronic tuner
An electronic tuner is the fastest and most accurate method. A clip-on chromatic tuner attaches to the headstock and picks up vibrations directly, so it works in noisy rooms and doesn’t need a cable.
Step-by-step process
- Clip the tuner to the headstock. Turn it on and make sure it’s set to chromatic mode (displays all 12 notes, not just guitar or bass).
- Start with the 4th string (D). Pluck it and watch the tuner display. It will show the note name and whether you’re sharp (too high) or flat (too low). Turn the tuning peg slowly until the tuner reads D and the indicator is centered.
- Tune the 3rd string to G. Same process. Watch for the note name --- a common beginner mistake is tuning to G# or F# and thinking you’re close enough. The letter must read G.
- Tune the 2nd string to B.
- Tune the 1st string to D. This D is one octave higher than the 4th string. The tuner will still read D.
- Tune the 5th string to G. This is the short string with the peg on the neck. It’s a high G, one octave above the 3rd string. Use the small geared peg carefully --- a small turn makes a big difference.
- Check all strings again. Tuning one string changes the tension on the head, which can pull other strings slightly out of tune. Go through all five a second time.
Avoid these common tuner mistakes
- Tuning to the wrong octave. If a string sounds way too tight or loose but the tuner says the note is right, you’re likely an octave off. The 4th string D should sound noticeably lower than the 1st string D.
- Not checking the note letter. Chromatic tuners show whatever note is closest. You might get a perfect reading on C# when you need D. Always confirm the letter matches your target.
- Old or dead strings. Worn strings produce inconsistent overtones that confuse tuners. If a string won’t settle on a stable reading, it might be time to replace it.
How to tune a banjo by ear
Tuning by ear is a practical skill for jam sessions, campfire playing, or any time you don’t have a tuner handy. The method relies on relative tuning --- using one in-tune string as a reference to tune the others.
Relative tuning method
You need at least one string to be in tune. If you have a piano, pitch pipe, or tuning fork, match your 4th string to D. Then:
- 4th string, 5th fret = 3rd string open. Fret the 4th string at the 5th fret and pluck it. That note is G. Now pluck the open 3rd string. Adjust the 3rd string peg until the two notes match.
- 3rd string, 4th fret = 2nd string open. Fret the 3rd string at the 4th fret. That note is B. Match the open 2nd string to it.
- 2nd string, 3rd fret = 1st string open. Fret the 2nd string at the 3rd fret. That note is D. Match the open 1st string to it.
- 1st string, 5th fret = 5th string open. Fret the 1st string at the 5th fret. That note is G. Match the open 5th string to it.
Listening for beats
When two notes are close but not identical in pitch, you’ll hear a wavering sound called beats --- a pulsing wobble in the volume. The closer the two notes get to matching, the slower the beats become. When the beats disappear entirely, the strings are in tune.
This takes practice. Start by tuning with a tuner, then checking your work by ear using the fret positions above. Over time, your ear will develop and you’ll be able to tune without the tuner at all.
Alternate tunings for 5-string banjo
Open G is where most players start, but different tunings open up different sounds and make certain songs easier to play. Here are the most common alternatives:
Double C (gCGCD)
Lower the 4th string from D to C and the 2nd string from B to C. This tuning is the bread and butter of clawhammer and old-time playing. The Banjo Hangout tuning database has hundreds of tabs organized by tuning if you want to explore what’s available in double C. It gives you an open C chord and works well for modal tunes.
Open D (f#DF#AD)
Raise every string by a whole step from open G. The 5th string goes from G to F#, the 4th stays on D, the 3rd goes to F#, the 2nd to A, and the 1st stays on D. Used for tunes in the key of D without a capo.
Sawmill tuning (gDGCD)
Also called “modal” or “mountain minor” tuning. From open G, just lower the 2nd string from B to C. This gives a haunting, ambiguous sound --- neither clearly major nor minor. A favorite for old-time tunes like “Shady Grove” and “Little Sadie.”
G tuning with a capo
Rather than retuning, many bluegrass players use a capo to change keys while keeping open G fingerings. Capo on the 2nd fret puts you in A, capo on the 4th fret puts you in B. You’ll also need a 5th-string capo (a small spike or sliding capo installed on the neck) to raise the 5th string to match.
Tuning other types of banjos
Not all banjos have five strings. The tuning approach differs by type:
4-string tenor banjo
The standard tenor banjo uses CGDA tuning (from 4th to 1st string), the same intervals as a viola or mandola. Irish tenor players often tune to GDAE (an octave below a mandolin). Either way, use a chromatic tuner and work from the lowest string up.
4-string plectrum banjo
The plectrum banjo is typically tuned CGBD --- the same as the four long strings of a 5-string banjo. Some players use DGBE (Chicago tuning), which matches the top four strings of a guitar.
6-string banjo
A 6-string banjo is tuned exactly like a guitar: EADGBE. If you already play guitar, you already know how to tune this one.
Keeping your banjo in tune
Even after tuning perfectly, banjos drift. A few things help:
- Stretch new strings. After putting on a new set, gently pull each string away from the fingerboard, retune, and repeat several times. New strings stretch and go flat quickly until they settle in.
- Check your head tension. A loose banjo head affects sustain and can cause tuning instability. The head should be tight enough to produce a clear, bright tone when you tap it.
- Keep the bridge in the right spot. The bridge isn’t glued down on a banjo --- it’s held in place by string pressure. If it shifts, your intonation suffers (notes sound in tune open but wrong when fretted). The bridge should sit so that the distance from the nut to the 12th fret equals the distance from the 12th fret to the bridge.
- Store properly. Temperature and humidity changes knock banjos out of tune fast. Avoid leaving your banjo in a hot car or near a heater.
- Tune up to the note, not down. When adjusting a peg, if you overshoot and go sharp, loosen the string below the target note and come back up. Tuning up to pitch seats the string more securely around the peg and helps it stay in tune longer.
Quick reference
If you’re just here for the notes, here they are:
| Tuning | 5th | 4th | 3rd | 2nd | 1st |
|---|---|---|---|---|---|
| Open G (standard) | g | D | G | B | D |
| Double C | g | C | G | C | D |
| Sawmill / Modal | g | D | G | C | D |
| Open D | f# | D | F# | A | D |
| G minor | g | D | G | Bb | D |
Now grab your tuner, get those strings dialed in, and start playing. A well-tuned banjo is the foundation for everything that follows --- whether you’re learning your first rolls or picking out tunes you’ve played for years. For help choosing your first instrument, check out our guide to the best banjos.