Open G tuning and tuner
In open G the open strings ring a G major chord, so one finger laid straight across the strings plays any major chord. A classic for slide guitar and blues.
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String notes: Open G (D G D G B D)
At A = 440 Hz. The tuner measures each plucked string against these frequencies.
| String | Note | Frequency | vs. standard |
|---|---|---|---|
| 6. | D2 | 73.4 Hz | ↓ 2 semitones |
| 5. | G2 | 98.0 Hz | ↓ 2 semitones |
| 4. | D3 | 146.8 Hz | unchanged |
| 3. | G3 | 196.0 Hz | unchanged |
| 2. | B3 | 246.9 Hz | unchanged |
| 1. | D4 | 293.7 Hz | ↓ 2 semitones |
How to tune
- Press “Start tuning” and allow the microphone. The sound stays in your browser and is never uploaded.
- You lower three strings by a whole step: 6th (E→D), 5th (A→G) and 1st (E→D). The rest stay put.
- Barre straight at fret 5 for C and fret 7 for D: all three chords of a blues with one finger.
- When the needle sits in the green middle zone (±3 cents), the string is in tune. Anything within 5 cents sounds in tune to the ear.
All tuned? Here are the chords, with shapes and sound →
More tuners and tunings
Frequently asked questions
What is open G tuning?
D – G – D – G – B – D. The open strings form a G major triad.
How is it different from open D?
In open D (D A D F♯ A D) the open chord is D major, and more strings change. Open G is more common for blues and rock slide, open D for folk.
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