Viola Tuner
Standard viola tuning is C – G – D – A, from the lowest string to the highest. The viola is tuned a fifth below the violin. Press Start tuner and play one string at a time.
Press Start and allow the microphone
Your browser will ask to use the microphone. Choose Allow.
✓ All strings in tune
Tap a string to hear it and tune only that string. Audio is analysed on this device and never uploaded. How it works →
- What it does
- Hears each viola string, shows which one, its note, Hz and cents
- What it does not do
- Record or upload audio · detect chords
- Reference pitch
- A4 = 440 Hz, adjustable 415–466 Hz
- Tested with
- 58 studio recordings of 11 instruments (right note on about 95% of frames at normal volume) and test tones from B0 to C6
- Made by
- The Appcellent team
- Updated
- November 2026
Tuner not hearing you?
- Allow the microphone. If you blocked it: in Chrome or Edge, click the icon left of the address bar → Microphone → Allow, then reload. In Safari on iPhone, tap aA → Website Settings → Microphone → Allow. In Firefox, click the crossed-out microphone in the address bar. On a Mac, also check System Settings → Privacy & Security → Microphone for your browser.
- Open the page in Safari or Chrome. In-app browsers (Instagram, Facebook, TikTok) often block the microphone.
- Play one note at a time, louder. Hold your phone or laptop close to the instrument and let the string ring. A quiet room helps.
- Wrong octave or jumping notes? Let the attack fade for a moment — the reading settles once the note is steady.
- No microphone at all? Tap a string button to hear its note and tune by ear.
Viola string notes and frequencies
Standard viola tuning is C3 (130.81 Hz), G3 (196.00 Hz), D4 (293.66 Hz) and A4 (440.00 Hz), from the lowest string to the highest (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 |
How to tune your viola
- Press Start tuner and allow the microphone.
- Tune the A string first, then D, G and C.
- Use fine tuners for small changes; turn pegs gently while pushing them in.
How viola tuning compares
The viola shares three strings with the violin (G, D, A) and adds a low C instead of the violin’s high E. Its C G D A tuning is an octave above the cello.
Questions
What are the viola string notes?
C, G, D, A from the lowest string to the highest.
How is viola tuning different from violin tuning?
The violin is G D A E. The viola drops the E and adds a low C, so it is a fifth lower.