Guitar tuner: Open G tuning
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— Hz — cents
Tap “Turn on tuner” and allow the microphone.
Guitar tunings
Standard and lower tunings
Other tunings
Open G tuning
Open G tuning: the open strings form a G major chord. A classic for slide and blues.
Notes: D2 G2 D3 G3 B3 D4.
Notes and frequencies of each string
| String | Note | Frequency |
|---|---|---|
| 6 | D2 | 73.42 Hz |
| 5 | G2 | 98.00 Hz |
| 4 | D3 | 146.83 Hz |
| 3 | G3 | 196.00 Hz |
| 2 | B3 | 246.94 Hz |
| 1 | D4 | 293.66 Hz |
How to use it
Tap “Turn on tuner”, allow the microphone and play one open string at a time. The tuner recognises the string and shows whether to tighten it (it is flat) or loosen it (it is sharp). Tap a string name to lock onto it and hear the reference note.
Frequently asked questions
Does the tuner work offline?
Yes. After the first visit (or once installed as an app), the pages open without a connection and pitch detection happens on your device.
What are cents?
A cent is one hundredth of a semitone. Up to 5 cents off is barely audible; the needle turns green in that range.
Can I change the reference A?
Yes: the − and + buttons set A4 anywhere from 430 to 450 Hz, to play along with a piano or a recording tuned differently. Your choice is saved.
Does the microphone record what I play?
No. The sound is analysed on the fly, inside the browser, and is never recorded or sent anywhere.