Tune to Open G

Open G tuning is D–G–D–G–B–D from the lowest string to the highest. Three strings change from standard tuning:

String	Standard	Open G	Change
6 (low)	E2	D2	↓ whole step
5	A2	G2	↓ whole step
4	D3	D3	unchanged
3	G3	G3	unchanged
2	B3	B3	unchanged
1 (high)	E4	D4	↓ whole step

Reference Tones #

Click any string button to hear its target pitch. Tune your string up or down until it matches. Use the duration selector to keep the tone ringing while you tune.

6 6th string — D (low) 73.42 Hz

5 5th string — G 98.00 Hz

4 4th string — D 146.83 Hz

3 3rd string — G 196.00 Hz

2 2nd string — B 246.94 Hz

1 1st string — D (high) 293.66 Hz

Tone duration: 3 sec 5 sec 10 sec

How to Tune #

Starting from standard tuning:

String 6 — Loosen until it matches string 4 (D3) an octave down. Or match the D2 tone above.
String 5 — Loosen until it matches string 3 (G3) an octave down. Or match the G2 tone above.
Strings 4, 3, 2 — Leave these exactly as they are. They’re already correct.
String 1 — Loosen until it matches string 4 (D3) an octave up. Or match the D4 tone above.

Quick check: Once tuned, strum all six strings open. You should hear a full, resonant G major chord.

Tips #

Tune slightly sharp then back down — tuning up to pitch is more stable than coming down to it.
Re-check string 6 last — loosening it early can slightly change the neck tension and pull other strings flat.
Use a clip-on tuner for the initial rough tuning, then fine-tune by ear using the reference tones above.
A capo at fret 2 in Open G gives you Open A tuning — great for playing along with horns.