Online Guitar Tuner
Play one string. The tuner shows the note and whether you are flat or sharp. Turn the peg until the needle is in the middle.
Press Start tuner and allow the microphone
Reference tones (standard guitar tuning)
Bass & ukulele
How to Use the Guitar Tuner & Pitch Detector
This chromatic tuner listens through your microphone and finds the pitch of the note you play. It works for guitar, bass, ukulele, violin, cello, banjo, mandolin and your voice. The needle shows how many cents you are away from the nearest note. Within ±5 cents, the note turns green.
- Press Start tuner. Allow microphone access.
- Play one string. Pluck it and let it ring.
- Read the needle. Left is flat, right is sharp.
- Turn the peg. Stop when the note turns green.
Standard Tunings
| Instrument | Notes (low to high) |
|---|---|
| Guitar | E2 A2 D3 G3 B3 E4 |
| Bass (4-string) | E1 A1 D2 G2 |
| Ukulele | G4 C4 E4 A4 |
| Violin | G3 D4 A4 E5 |
| Cello | C2 G2 D3 A3 |
| Mandolin | G3 D4 A4 E5 |
Tips for Accurate Tuning
- Tune up to the note. If you are sharp, go below and come back up.
- Play one string at a time and mute the others.
- Hold the phone or laptop near the sound hole.
- Retune after a few minutes, because new strings stretch.
Alternate Tunings
Drop D (D2 A2 D3 G3 B3 E4), Open G (D2 G2 D3 G3 B3 D4) and DADGAD (D2 A2 D3 G3 A3 D4) all work, because the tuner is chromatic and shows any note.
Frequently Asked Questions
Does it work with an acoustic guitar?
Yes. Hold your phone or laptop near the sound hole.
What is A4 = 440 Hz?
The standard reference pitch. Some bands tune to 432 or 442 Hz. Change it in the box.
Why does the note jump around?
Background noise or more than one string ringing. Mute the others.
Can I tune my voice?
Yes. Sing a steady note and watch the needle.
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