G7 · Electric guitar

A doorbell ringing with nobody answering. A phone buzzing face-down on the table. Some things only exist to be resolved — G7 is their musical version. Give the audio below a listen and feel the unfinished business.

Listen first

What you just heard

Why does it sound unfinished? Inside G7, two notes are arguing: B and F. Go back to the audio and catch the arpeggio note by note and catch the second and the last note — the distance between them is the tritone, the tensest interval tonal music knows. G and D 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 electric guitar a chord needs only a few clear notes — the amp sustains them and fills the space, so you mute the strings you are not playing and let the tone carry the rest. So grab the first position below — 3 open strings to help you; the position marked with ⭐ is the easiest to play. Now the experiment that explains this chord better than any explanation: play G7, hold it for one breath, then play C. 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 · see it in Chord & Fret

The other positions earn their keep in blues and jazz, where this chord is practically the official language; learn them one at a time.

Every shape of G7 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.

What is G7?

G7: G Major with Seventh. The notes are G, B, D, F (fixed-do: Sol, Si, Re, Fa) — the degrees 1–3–5–b7.

Where this chord lives

Its job is fixed: G7 is a dominant, and dominants live as VII7 in A minor, V7 in C major. Plainly: where it enters, the song is about to leave the room. 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 · open in Chord & Fret

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

Where it tends to go

Treating G7 as the home chord (I) of its key, it tends to go toward the pre-dominant (Am / C) or the dominant (D / F#°) — and the dominant pulls back home. It's a tendency, not a law.

When you want to go further

For soloing, G Mixolydian (G A B C D E F · 1 2 3 4 5 6 b7: the major scale with a lowered seventh — the blues accent); G Lydian dominant (G A B C# D E F · 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, the twin dominant living three whole steps from here, the one arrangers reach for when they want to arrive at the same place by a prettier road.

Improvising in context

To improvise over G7 as home, the G Mixolydian scale covers it whole — it contains every note of the chord. And when the dominant (D) pulls back, the leading tone F# is the note that wants to resolve home.

Swaps that work:

• Db7 — Tritone substitution (shared 3rd–7th tritone)
• Dm7 — Forms a II–V: precede with this ii
• Abdim7 — Passing diminished (ascending)

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

You already know how this sentence ends. The period after G7 is called C — go there and close it with your own fingers.

Updated July 9, 2026