C Standard Tuning
C standard tuning is C – F – B♭ – E♭ – G – C, from the 6th string to the 1st. Every string is tuned two whole steps (four semitones) below standard tuning, so chord shapes stay the same and everything sounds lower.
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
- Preset to C Standard: hears each string, shows which one and how far to turn it
- 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.
C Standard notes and frequencies
C Standard tuning is C2 (65.41 Hz), F2 (87.31 Hz), B♭2 (116.54 Hz), E♭3 (155.56 Hz), G3 (196.00 Hz) and C4 (261.63 Hz), from the 6th string to the 1st. From standard tuning (E A D G B E): Lower the 6th string from E to C (2 whole steps); lower the 5th string from A to F (2 whole steps); lower the 4th string from D to B♭ (2 whole steps); lower the 3rd string from G to E♭ (2 whole steps); lower the 2nd string from B to G (2 whole steps); lower the 1st string from E to C (2 whole steps).
| String | Note | Frequency | From standard |
|---|---|---|---|
| 6 | C2 | 65.41 Hz | E2 → C2 · down 2 whole steps |
| 5 | F2 | 87.31 Hz | A2 → F2 · down 2 whole steps |
| 4 | B♭2 | 116.54 Hz | D3 → B♭2 · down 2 whole steps |
| 3 | E♭3 | 155.56 Hz | G3 → E♭3 · down 2 whole steps |
| 2 | G3 | 196.00 Hz | B3 → G3 · down 2 whole steps |
| 1 | C4 | 261.63 Hz | E4 → C4 · down 2 whole steps |
About C Standard tuning
C standard is common in doom, stoner and heavy rock, where a deep sound matters but players want to keep normal chord shapes. Because every string drops by the same amount, the intervals between strings do not change.
Four semitones is a big drop. Heavier strings (12s or 13s) keep the tension playable and stop the low strings from buzzing.
How to tune to C Standard
- Press Start tuner above and allow the microphone. The tuner is already set to C Standard.
- Play one string at a time. The tuner shows which string it hears and whether to tune up or down.
- Turn the peg until the needle is centered and the note turns green. Tap a string button to hear its target note.
- After all strings are done, check them again — changing tension on one string pulls the others slightly.