Open D tuner
Tune your guitar to open D (D A D F♯ A D) with your microphone, right in your browser.
Your microphone stays on this device. Nothing is recorded, saved or sent.
Tap Start tuning, then play a string.
Open D tuning: notes and frequencies
| String | Note | Frequency |
|---|---|---|
| 6th | D2 | 73.4 Hz |
| 5th | A2 | 110.0 Hz |
| 4th | D3 | 146.8 Hz |
| 3rd | F♯3 | 185.0 Hz |
| 2nd | A3 | 220.0 Hz |
| 1st | D4 | 293.7 Hz |
How to get to open D from standard
- 6th stringE2 → D22 semitones down (2 frets)
- 3rd stringG3 → F♯31 semitone down (1 fret)
- 2nd stringB3 → A32 semitones down (2 frets)
- 1st stringE4 → D42 semitones down (2 frets)
The 5th and 4th strings stay at A2 and D3.
Go a little below the new note, then tune up to it. A string tuned up to pitch stays there longer.
About open D
Strum the six open strings and you hear a D major chord. One finger across any fret plays a major chord, so open D is a favourite for slide guitar and for fingerstyle with ringing open strings.
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