Open D tuner
Tune to Open D (D A D F♯ A D) with your microphone or by ear.
Open D
Start tuner
Your browser asks for the microphone when you press Start. Nothing is recorded or uploaded.
Tap a string to hear it and tune that string.
Open D tunes the open strings to a D major chord: D A D F♯ A D. Four strings come down from standard: the 6th, 2nd, and 1st by a whole step, and the 3rd by a semitone.
As in Open G, a straight barre at any fret plays a major chord, so it suits slide guitar and fingerstyle. The lower root gives it a deeper, fuller sound.
Open D: notes and frequencies
| String | Note | Pitch | Frequency |
|---|---|---|---|
| 6 | D | D2 | 73.42 Hz |
| 5 | A | A2 | 110.00 Hz |
| 4 | D | D3 | 146.83 Hz |
| 3 | F♯ | F♯3 | 185.00 Hz |
| 2 | A | A3 | 220.00 Hz |
| 1 | D | D4 | 293.66 Hz |
From standard tuning to Open D
- String 6: lower it from E2 to D2, 2 semitones down.
- String 5: stays at A2.
- String 4: stays at D3.
- String 3: lower it from G3 to F♯3, 1 semitone down.
- String 2: lower it from B3 to A3, 2 semitones down.
- String 1: lower it from E4 to D4, 2 semitones down.
The 3rd string moves only a semitone, from G to F♯. The 6th, 2nd, and 1st come down a whole step.
Tune to Open D by ear
Tune string 6 (D2) to a reference first: tap it in the tuner above, or use a piano or another instrument. Then tune each string to one that is already in tune:
- Play string 6 at fret 7, then tune open string 5 until the two sound the same (A2).
- Play string 5 at fret 5, then tune open string 4 until the two sound the same (D3).
- Play string 4 at fret 4, then tune open string 3 until the two sound the same (F♯3).
- Play string 3 at fret 3, then tune open string 2 until the two sound the same (A3).
- Play string 2 at fret 5, then tune open string 1 until the two sound the same (D4).
Learning a song in Open D?
Record it or upload it, and Tabtify turns it into tab you can play along with. Choose Open D under Tuning in the converter's options so the frets match your guitar.
Turn a recording into tabOpen D tuner FAQ
What are the notes of Open D?
From string 6 to string 1: D2, A2, D3, F♯3, A3, D4. With A4 at 440 Hz, that is 73.42 Hz, 110.00 Hz, 146.83 Hz, 185.00 Hz, 220.00 Hz, 293.66 Hz.
What is the difference between Open D and DADGAD?
Only the 3rd string. Open D has F♯ there, making a D major chord; DADGAD keeps it at G, making the open strings a Dsus4.
How do I play chords in Open D?
Barre all six strings: open is D, the 5th fret G, the 7th fret A.