Open chord tuning · D major
Open D guitar tuner: D A D F♯ A D
Tune the six open strings to a complete D-major chord: D2, A2, D3, F♯3, A3 and D4 for slide, fingerstyle and resonant chord shapes.
Start tuning now
Private by design · no account · audio stays on this device
Live target±5 cents
D2·A2·D3·F♯3·A3·D4
FlatIn tuneSharp
Know the target
D major without fretting a chord
Open D contains the root D, fifth A and major third F♯ across the open strings. A barre at any fret moves the same complete major-chord shape while open D and A strings provide strong resonance.
Four strings move down from Standard: both E strings become D, G3 becomes F♯3 and B3 becomes A3. A2 and D3 remain unchanged.
Four clear steps
How to tune accurately
- 1Lower the sixth string to D2, then verify A2 and D3.
- 2Lower G3 by one semitone to F♯3.
- 3Lower B3 to A3 and high E4 to D4.
- 4Strum the open D-major chord and make one final tuning pass.
Reference: A4 = 440 Hz
Notes and frequencies
| Physical string | Target | Frequency |
|---|---|---|
| String 6 | D2 | 73.42 Hz |
| String 5 | A2 | 110.00 Hz |
| String 4 | D3 | 146.83 Hz |
| String 3 | F♯3 | 185.00 Hz |
| String 2 | A3 | 220.00 Hz |
| String 1 | D4 | 293.66 Hz |
Changing the tuner calibration recalculates every target from A4 = 415–450 Hz. The values above use the common 440 Hz reference.
Practical answers
Frequently asked questions
What chord do the open strings make in Open D?
They make a D-major chord using D, F♯ and A across multiple octaves.
Is Open D safer than tuning up to Open E?
Open D lowers strings from Standard and therefore avoids the increased tension created by tuning several strings upward to Open E.
Does tuner.love upload my microphone audio?
No. Pitch analysis runs locally in your browser. Microphone audio is not uploaded to a backend and is never replayed through your speakers.
Ready to tune?
Open the live tuner. Your browser handles the microphone signal locally.
Open open d guitar tuner: d a d f♯ a d