AllTuners.com
STANDARD EADGBEโ—†DROP D (DADGBE)โ—†DROP Cโ—†HALF-STEP DOWN (Eb)โ—†DADGAD CELTICโ—†OPEN Gโ—†OPEN Dโ—†4-STRING BASSโ—†5-STRING BASSโ—†UKULELE (gCEA)โ—†SUB-CENT ACCURACYโ—†SCREEN WAKELOCK ACTIVEโ—†NO APP REQUIREDโ—†100% FREEโ—†
HIGH-PRECISION WEB INSTRUMENT TUNER

Open C Tuning Tuner (C G C G C E)

An expansive open tuning sounding a deep C major triad (CGCGCE), favored for lush acoustic fingerstyle and drone acoustic.

โ–ผ
CALIBRATION:
A4 = 440 Hz
Turn on tuner or tap any peg
-50ยข-25ยขโ—† 0ยข+25ยข+50ยข
โ€“
โ—--cents
--Hz
Standard Guitar (E ยท A ยท D ยท G ยท B ยท E)
Studio Oscilloscope โ€ข Real-Time PCM
VU LEVEL
-60-36-24-12-60 dB
-โˆž dB
Screen Awakeโ€ขBuffer: 2048
HEADSTOCK STYLE
GTPRO#6E2#5A2#4D3#3G3#2B3#1E4

Tap any peg to hear reference tone or pin string

EXACT PITCH FREQUENCIES

Open C Tuning String Notes & Hertz

Exact acoustic frequencies for each string in Open C Tuning at standard concert pitch (A4 = 440 Hz).

StringNoteScientificTarget FrequencyReference Pluck
#6CC265.41 Hz
#5GG298.00 Hz
#4CC3130.81 Hz
#3GG3196.00 Hz
#2CC4261.63 Hz
#1EE4329.63 Hz
TUNING INSTRUCTIONS

How to Tune to Open C Tuning

Follow these sequential steps to safely adjust your peg tension into Open C Tuning.

1

Drop 6th string two full steps down to C2 (65.41 Hz).

2

Drop 5th string one full step down to G2 (98.00 Hz).

3

Drop 4th string one full step down to C3 (130.81 Hz).

4

Keep 3rd string at G3 (196.00 Hz).

5

Tune 2nd string UP a half-step to C4 (261.63 Hz).

6

Keep 1st string at E4 (329.63 Hz).

EXPLORE SIBLING TUNINGS

More Guitar Tunings

View All Guitar Tunings โ†’
Standard Guitarโ†’
E A D G B E

The universal concert tuning used across rock, pop, acoustic, blues, and classical guitar.

Drop Dโ†’
D A D G B E

The 6th string is dropped one whole step from E down to D, enabling fast one-finger power chords.

Drop Cโ†’
C G C F A D

All strings tuned one full step down, with the 6th string dropped an additional whole step to C.

Half-Step Down (Eb)โ†’
Eb Ab Db Gb Bb Eb

Every string tuned down one semitone (Eb Ab Db Gb Bb Eb) for warmer acoustic timbre and easier bends.

D Standard (Full Step Down)โ†’
D G C F A D

Every string lowered by one full whole step (D G C F A D) for dark, heavy chords.

DADGAD (Celtic Tuning)โ†’
D A D G A D

Modal D suspended tuning renowned for open, ringing acoustic harmonies in Celtic and fingerstyle folk.

Open G Tuningโ†’
D G D G B D

Strumming all open strings produces a pure G major triad. The definitive sound of the Rolling Stones.

Open D Tuningโ†’
D A D F# A D

An open strum rings out a full D major chord (D A D F# A D). Standard for blues slide guitar.

Open E Tuningโ†’
E B E G# B E

Open strum produces an E major chord. Duane Allman / Derek Trucks slide signature.

Double Drop Dโ†’
D A D G B D

Both the 1st and 6th outer strings are dropped one whole step to D, creating a symmetrical D-A-D-G-B-D tuning.

C Minor 11 (Cm11)โ†’
C G C Eb G Bb

An evocative modal minor tuning (C G C Eb G Bb) creating an open C minor 11 chord with haunting, cinematic overtones.

7-String Guitar Standardโ†’
B E A D G B E

Standard seven-string guitar tuning (BEADGBE) adding a heavy low B fifth below standard low E.

12-String Guitar Standardโ†’
eE aA dD gG BB EE

Standard twelve-string acoustic/electric concert tuning with octave pairings on the lower 4 courses and unisons on the top 2 courses.

QUESTIONS & ANSWERS

Open C Tuning Frequently Asked Questions

What songs use Open C tuning?โ–ผ

Open C is used in Led Zeppelin ("Friends"), John Fahey compositions, and extensively by Devin Townsend for heavy, cavernous acoustic resonance.

Do I need heavy strings for Open C tuning?โ–ผ

Because the bottom three strings are tuned down significantly (C2, G2, C3), medium or light-top/heavy-bottom strings (11-52 or 12-56) work best to prevent fret buzzing.