D7 · Guitar

You know when you climb stairs in the dark and count one step too many? Your foot hangs there, waiting for a floor that never came. Tap the player below: D7 is that foot in the air.

Listen first

What you just heard

Why does it sound unfinished? Inside D7, two notes are at odds: F# and C. Play the arpeggio again, no rush and catch the second and the last note — the distance between them is the tritone, the tensest interval tonal music knows. D and A keep the house standing while those two argue inside it. And an argument, you know, demands a resolution.

Now it's your hands' turn

On the guitar, six strings give the chord room to breathe — some positions use them all, others ask you to mute the lowest ones. So grab the first position below — 1 open string to help you; the position marked with ⭐ is the easiest to play. Now the experiment that explains this chord better than any explanation: play D7, hold it for one breath, then play G. Felt the door close? Do it again. That relief is the reason this chord exists.

Precision Tuner — Before you play these shapes, get in tune — chromatic tuner and reference tones · open in Chord & Fret

Save the positions below for when the blues calls: over there, this chord is the house language.

What is D7?

D7: D Major with Seventh. The notes are D, F#, A, C (fixed-do: Re, Fa#, La, Do) — the degrees 1–3–5–b7.

Where this chord lives

Its job is fixed: D7 is a dominant, and dominants live as VII7 in E minor, V7 in G major. Translation: wherever it shows up, the music is about to move. A chart full of 7th chords is a song that won't sit still.

Transpose & Capo — Need it in another key? Move the whole chart and find the easiest capo · see it in Chord & Fret

Identify Chord — Found a shape on your own fretboard? The app names it back · try it in Chord & Fret

Where it tends to go

Treating D7 as the home chord (I) of its key, it usually moves toward the pre-dominant (Em / G) or the dominant (A / C#°) — and the dominant pulls back home. It's a tendency, not a law.

Every shape of D7 lives in Chord & Fret Pro — 4 instruments, 16 tunings, 41 chord types and 57 scales, in every key. Start free. Unlock everything with Pro. 100% offline. Made by musicians, no ads.

When you want to go further

For soloing, D Mixolydian (D E F# G A B C · 1 2 3 4 5 6 b7: the major scale with a lowered seventh — the blues accent); D Lydian dominant (D E F# G# A B C · 1 2 3 #4 5 6 b7: a mixolydian with a raised fourth: the dominant in formalwear) cover the whole chord. And look at the first swap on the list below: that's the famous tritone substitution, a second dominant hiding three whole steps away, the one arrangers reach for when they want to arrive at the same place by a prettier road.

Improvising in context

To improvise over D7 as home, the D Mixolydian scale fits entirely — it contains every note of the chord. And when the dominant (A) pulls back, the leading tone C# is the note that wants to resolve home.

Swaps that work:

• Ab7 — Tritone substitution (shared 3rd–7th tritone)
• Am7 — Forms a II–V: precede with this ii
• Ebdim7 — Passing diminished (ascending)

Reharmonize — Want richer substitutions? Reharmonize the progression in a tap · use it in Chord & Fret

The same chord, dressed for jazz

Jazz Lab — Drop 2, drop 3 and shell in any key — the Jazz Lab opens them all · open in Chord & Fret

You already know how this sentence ends. The period after D7 is called G — go there and close it with your own fingers.

Updated July 9, 2026