Open chord tuning · G major
Open G guitar tuner: D G D G B D
Lower the sixth, fifth and first strings by a whole step so the open guitar sounds a G-major voicing: D2, G2, D3, G3, B3 and D4.
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Live target±5 cents
D2·G2·D3·G3·B3·D4
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Know the target
A G-major chord across the open strings
Open G is widely used for slide, blues and roots guitar because a straight barre produces a major chord. The middle D3, G3 and B3 strings remain at Standard pitch.
The lowest D2 is the fifth of the chord rather than the root. Some players omit that string in certain chord shapes, but it still needs to be tuned accurately for full six-string voicings.
Four clear steps
How to tune accurately
- 1Lower the sixth string from E2 to D2 and the fifth from A2 to G2.
- 2Verify the unchanged D3, G3 and B3 middle strings.
- 3Lower the first string from E4 to D4.
- 4Sound the open G-major voicing and recheck the three lowered strings.
Reference: A4 = 440 Hz
Notes and frequencies
| Physical string | Target | Frequency |
|---|---|---|
| String 6 | D2 | 73.42 Hz |
| String 5 | G2 | 98.00 Hz |
| String 4 | D3 | 146.83 Hz |
| String 3 | G3 | 196.00 Hz |
| String 2 | B3 | 246.94 Hz |
| String 1 | D4 | 293.66 Hz |
Changing the tuner calibration recalculates every target from A4 = 415–450 Hz. The values above use the common 440 Hz reference.
Practical answers
Frequently asked questions
Which strings stay the same in Open G?
The fourth, third and second strings remain D3, G3 and B3, exactly as in Standard tuning.
Why is the lowest Open G string a D?
D is the fifth of the G-major chord. The open-string sequence begins D–G rather than placing G in the bass.
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Open open g guitar tuner: d g d g b d