Online Viola Tuner
Tune your viola with your microphone, or by ear with bowed reference tones. Standard tuning is C G D A, a perfect fifth below the violin.
- Free, no sign-up
- Bowed reference tones
- Private, on-device
Reference pitch (A4)
Hz
Lower it in noisy rooms
Press Start tuning, then play a string
0/4 tuned
Standard notes
A4 = 440 Hz| String | Note | Frequency |
|---|---|---|
| 4 | C3 | 130.81 Hz |
| 3 | G3 | 196.00 Hz |
| 2 | D4 | 293.66 Hz |
| 1 | A4 | 440.00 Hz |
Viola tuning
The viola is tuned C G D A, a fifth below the violin and an octave above the cello. Tune the A first, then work down to D, G and C.
The low C string (C3, 130.81 Hz) is slow to respond, so play a full, steady bow stroke before you read the needle.
Keyboard shortcuts
- Space Start or stop the microphone
- 1–9 Play a string’s reference note
- M Switch Auto / Manual mode
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Start the tuner
Press Start tuning and allow access to the microphone. Hold your viola 20–50 cm from the mic.
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Play one string
Pluck one string and let it ring. Auto mode shows the closest string. To stay on one string, switch to Manual.
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Adjust the peg or fine tuner
If the needle is on the left, tighten the string to raise the pitch. If it is on the right, loosen it. Stop when the needle is in the middle and turns green.
Frequently asked questions
What are the viola string notes?
C3, G3, D4 and A4, from the lowest string to the highest. That is a perfect fifth below the violin.
Is viola tuning the same as cello?
The note names are the same, but the cello is tuned one octave lower (C2 G2 D3 A3).
Which string do I tune first?
Tune the A string first, then D, G and C.
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