Updated September 28, 2026

Viola Tuner

Tune your viola to C G D A with your device's microphone.

Tunes with your device's microphone. Nothing is recorded or uploaded.

Settings

Reference pitch (A4)

440 Hz432 Hz442 Hz415 Hz

How to Tune Your Viola

Tune the A string first, then D, G, and C.
Tap Start Tuning and bow or pluck one string at a time. A long, even bow stroke gives the steadiest reading.
Use the fine tuner(s) on the tailpiece, if your viola has them, for small changes and the pegs only when a string is far off, pushing the peg gently into the pegbox as you turn.

String Notes and Frequencies

At the standard reference pitch, A4 = 440 Hz. String 1 is the highest-pitched string.

String	Note	Frequency
4	C3	130.81 Hz
3	G3	196.00 Hz
2	D4	293.66 Hz
1	A4	440.00 Hz

Questions

What are the notes of the viola strings?+

From lowest to highest: C3, G3, D4, and A4. The viola shares the violin's G, D, and A strings and has a low C instead of the violin's high E.

Can I use a violin tuner for a viola?+

A chromatic tuner works for any instrument, but a violin tuner's string buttons don't include the viola's C string. Use this page or the chromatic tuner.

Should I use A4 = 440 Hz?+

Yes, unless you play with a group or a recording that uses a different reference. Some orchestras tune to 442 Hz, and Baroque ensembles often use 415 Hz. Change it under Settings. The choice is saved on your device.

Is my audio recorded?+

No. The sound is analyzed in your browser, on your device. Nothing is saved or uploaded.

Viola Tuner

How to Tune Your Viola

String Notes and Frequencies

Questions

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