Online Guitar Tuner
MicrophoneReference notes7 tuningsNothing recorded
How to tune a guitar with the tuner
No microphone? Click a string button to hear its reference note, then turn the peg until your string sounds the same, without the slow wobble you hear when two notes are close but not equal.
- Start the tuner and allow the microphone. A phone or laptop microphone is enough; get close to the guitar in a quiet room.
- Play the thickest string open, the low E, with a firm pluck, and let it ring. The tuner shows E and a needle.
- Turn the tuning peg slowly. Needle to the left, the string is too low: tighten it. Needle to the right, too high: loosen it. Stop when it turns green.
- Tune up to the note. If you went past it, go a little below and come back up: the string holds its tuning better.
- Do the other five strings, A, D, G, B and the high E, then check them all once more: tuning one string slightly changes the others.
Guitar string notes and frequencies
Strings are numbered from the thinnest, the 1st, to the thickest, the 6th. Frequencies are for A4 = 440 Hz; the two E strings are two octaves apart.
| String | Note | Frequency (Hz) |
|---|---|---|
| 6th (thickest) | E2 | 82.41 |
| 5th | A2 | 110.00 |
| 4th | D3 | 146.83 |
| 3rd | G3 | 196.00 |
| 2nd | B3 | 246.94 |
| 1st (thinnest) | E4 | 329.63 |
Once you are in tune
Frequently asked
How do I tune my guitar with this online tuner?
Press Start the tuner and allow the microphone. Play one open string and let it ring: the tuner names the nearest string and the needle shows how far you are. Tighten the string if the needle is to the left, loosen it if it is to the right, until it turns green and reads In tune.
What are the notes of standard guitar tuning?
From the thickest string to the thinnest: E A D G B E, that is E2, A2, D3, G3, B3 and E4. A common way to remember them is Eddie Ate Dynamite, Good Bye Eddie.
Is my microphone sound recorded or sent anywhere?
No. The pitch is measured inside your browser, a few times per second, and the sound is never recorded, stored or sent. Press Stop to switch the microphone off.
Can I tune a bass or use drop D with this tuner?
Yes. Choose Bass (E A D G), Drop D, half step down, DADGAD, open G or open D in the Tuning menu. The string buttons and the needle follow the tuning you choose.
What does A4 = 440 Hz mean?
It is the reference pitch: the A above middle C vibrates 440 times per second, and every other note is tuned from it. Leave it at 440 unless you play along with a recording or a band tuned slightly higher or lower.
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