Open D Tuner

Open D tuning is D A D F# A D, from low to high. The open strings form a D major chord.

Tune your guitar to Open D tuning (D A D F# A D) with the mic tuner, step-by-step instructions, reference tones, and fretboard diagram below.

Hear Open D as a single open-string strum:

Tuner for Open D

Select a string, start the mic tuner, play the note clearly, and adjust the string until the meter shows that it is in tune.

Target

Detected

Difference

Note: The mic tuner works best in a quiet room. Use one string at a time.

Use this diagram to see where the notes sit on the fretboard in Open D tuning.