What are the notes of Open C tuning?

From the lowest string: C2 G2 C3 G3 C4 E4.

How do I tune to Open C from standard?

String 6 (E2): tune down 4 half steps to C2; String 5 (A2): tune down a whole step to G2; String 4 (D3): tune down a whole step to C3; String 2 (B3): tune up a half step to C4.

Open C Tuning

Open C tuning (C2 G2 C3 G3 C4 E4, low to high). Open strings form a C major chord — deep, resonant acoustic sound. Below is every note on the fretboard in this tuning and how to get there from standard tuning. In the interactive fretboard you can show scales, 3NPS patterns, chord shapes and triads directly in Open C.

Open the fretboard in Open C ▸

Notes on the fretboard (frets 0–12)

Pink = open strings, blue = natural notes, purple = sharps/flats.

How to tune from standard

String 6 (E2): tune down 4 half steps to C2
String 5 (A2): tune down a whole step to G2
String 4 (D3): tune down a whole step to C3
String 2 (B3): tune up a half step to C4

Other guitar tunings

Standard
E♭ Standard
D Standard
Drop D
Drop C
Drop B
DADGAD
Open G
Open D
Open E
Open C
All fourths
7 strun / 7-string
8 strun / 8-string

FAQ

What are the notes of Open C tuning?: From the lowest string: C2 G2 C3 G3 C4 E4.
How do I tune to Open C from standard?: String 6 (E2): tune down 4 half steps to C2; String 5 (A2): tune down a whole step to G2; String 4 (D3): tune down a whole step to C3; String 2 (B3): tune up a half step to C4.