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Bass tuner

Tap Start tuner, allow the microphone and play one string. The tuner lights the string it hears and says tune up or tune down until it reads In tune. Standard bass tuning is E A D G, from the lowest, thickest string to the highest: E1 A1 D2 G2, an octave below a guitar’s four lowest strings.

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4-string tuning

Tap Start tuner, then play a string

E A D G, tuned to A4 at 440 Hz.

The tuner picks the string it hears. Tap a string to hear its note and tune to that one.

The mic is on only while the tuner is, and what it hears stays in this browser.

How to tune a bass with the tuner

Start the tuner

Tap Start tuner and allow the microphone. Hold your phone or computer close to the bass, in a quiet room.

Play one string

Play the 4th string open and let it ring. The tuner lights the string it hears and shows how far off it is.

Turn until it reads In tune

If it says tune up, tighten the string with its tuning peg; if it says tune down, loosen it. Turn a little at a time and play the string again.

Check every string again

Tune the others the same way, then check them all once more: tuning one string pulls a little on the rest.

A string tuned up to its note holds its pitch better, so if one is sharp, go a little below the note and come back up to it.

Bass string notes

Each open string in standard tuning, from the 1st to the 4th, with the frequency the tuner tunes it to.

Bass tuning: each string’s note and frequency, with A4 at 440 Hz
StringNoteFrequency
1stG298 Hz
2ndD273.42 Hz
3rdA155 Hz
4thE141.2 Hz

How to tune by ear, one string against another, is on the bass guitar tuning page.

Questions about tuning a bass

What are the notes of the bass strings?

E A D G on a 4-string bass, from the thickest string: E1 A1 D2 G2. A 5-string adds a low B0 below the E, and a 6-string a high C3 as well: pick yours above.

How do I tune a bass with my phone?

Open this page on your phone, tap Start tuner and allow the microphone, then play one string at a time close to the phone. There is nothing to install, and it works the same on a computer with a mic.

Why does the tuner show the wrong string?

It names the string nearest the note it hears, so a string tuned far off can read as the one beside it. Tap the string you are tuning and the tuner measures against that string, whatever it hears; tap it again to let the tuner pick.

Why doesn’t the tuner hear my bass?

Check that the browser has allowed the microphone, play close to it in a quiet room and let the string ring. A phone’s mic hears low strings faintly, so play those a little louder.

Is my sound recorded or sent anywhere?

No. The tuner listens in your browser and works out the pitch on your device. Nothing is recorded, saved or sent, and it stops listening when you tap Stop tuner or leave the page.

More tuners

Guitar tuner

E A D G B E

Standard, drop D, open G, DADGAD and ten more.

Ukulele tuner

G C E A

Standard G C E A, low G, baritone and D tuning.

Violin tuner

G D A E

G D A E, with the A at 440 Hz, and two cross tunings.

Viola tuner

C G D A

C G D A, a fifth below a violin.

Cello tuner

C G D A

C G D A, an octave below a viola.

Banjo tuner

G D G B D

Open G, double C, open D, G modal and tenor banjo.

Mandolin tuner

G D A E

G D A E like a violin, mandola and octave mandolin.

For any other instrument or your voice, use the chromatic online tuner.

Play along in E minor

Tuned up? Open the free editor with a beat in E minor playing and play your bass along with it, then add a melody or your voice, part by part. No account needed to start.

Start a beatAll tuners

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