Online Instrument Tuner

Play any note and the tuner shows its name and how far it is from pitch. Works for any instrument or voice.

Choose your instrument

• Guitar tunerE A D G B E
• Bass tunerE A D G
• Cello tunerC G D A
• Viola tunerC G D A
• Mandolin tunerG D A E
• Banjo tunerg D G B D
• Violin tunerG D A E
• Ukulele tunerG C E A
• Tuning forkA440 reference

Each instrument page has reference notes you can play for every string, plus tuning tips.

How the chromatic tuner works

A chromatic tuner recognises all 12 notes, so it works for any instrument, any tuning and your voice. Press Start tuner, allow the microphone, and play a single note. The display shows the nearest note and how many cents sharp or flat you are. 100 cents make one semitone. Within 5 cents counts as in tune and turns the display green.

Reading the needle

• Needle left, negative cents: the note is flat. Tighten the string or raise the pitch.
• Needle right, positive cents: the note is sharp. Loosen the string or lower the pitch.

Reference pitch

The default is A4 = 440 Hz, the modern standard. Change it between 415 and 466 Hz to match an orchestra (441 or 442 Hz) or baroque pitch (415 Hz).

Frequently asked questions