G7 piano chord, G dominant 7th notes and fingering.

The G7 piano chord is G dominant 7th: G, B, D and F. It is the G major triad (G, B, D) with a minor seventh (F) added on top, ten semitones above the root. A plain 7 in a chord name, as in G7, always means this flat seventh, not the major seventh.

How to play G7 on piano

1. Find G on the keyboard. G is the white key between the first and second black keys of the group of three.
2. With your right hand, put finger 1 on G, finger 2 on B, finger 3 on D and finger 5 on F. Finger 1 is the thumb.
3. Press all four keys together. In root position they run from G3 to F4, a reach of 10 semitones. Play chord sounds them together and Arpeggio sounds them one by one, from the bottom up.
4. Click Left hand to see the left hand. It plays G2 to F3, one octave lower: G with finger 5, B with finger 3, D with finger 2, F with finger 1.
5. The cards under the keyboard hold the four positions, with G, B, D and F at the bottom in turn. Play and Arpeggio on a card play that position.
6. Open Note names. Every note of this chord is a white key, so the Sharps and Flats choices show the same names.

How G7 is built

Counted from the root, the formula is 0, 4, 7, 10. Stacked on each other the gaps are 4 + 3 + 3: a major third, a minor third and another minor third. The third (B) and the seventh (F) are 6 semitones apart, which is a tritone, the most tense interval in the chord. That pair is what makes the chord lean toward a resolution.

Worked example: the pitch of G3. On a piano tuned to A4 = 440 Hz, a note 14 semitones below A4 has the frequency 440 × 2^(-14/12), which is about 196.00 Hz. B3 is 10 semitones below A4, so 440 × 2^(-10/12) gives about 246.94 Hz.

What the keys look like under your hand

G has a black key on each side, F# on its left and Ab on its right. All four notes are white keys (G, B, D and F), so the hand can stay flat and there is no reaching for a black key. The thumb (G) and little finger (F) are both on white keys here, so the hand can lie in its natural shape.

G7 inversions and fingering

G7 has four positions. In root position G is at the bottom. In the first inversion, B is at the bottom and the chord is written G7/B. In the second inversion, D is at the bottom and the chord is written G7/D. In the third inversion, F is at the bottom and the chord is written G7/F. The tightest reach, 8 semitones from the lowest key to the highest, is the first inversion. The widest, at 10, is the root position.

The keys that hold G7

G7 fits two of the major and natural minor keys that have a standard key signature, which means every note of it comes from that key's scale. The simplest is C major, with no sharps or flats, where it is chord V7.

Progressions that use G7, with the chord numbers and the chords in that key:

• C major: Imaj7-IVmaj7-V7-Imaj7, which is Cmaj7, Fmaj7, G7, Cmaj7, the three-chord cadence of folk, rock and blues.
• A minor: i7-VII7-VImaj7-VII7, which is Am7, G7, Fmaj7, G7, a rocking figure between VII and VI.
• C major: vi7-IVmaj7-Imaj7-V7, which is Am7, Fmaj7, Cmaj7, G7, the four-chord loop started from the vi chord.

Blues: a 12-bar blues in G is built on G7, C7 and D7.

Here is a worked example in C major. The chord before G7 in the first progression above is Fmaj7 (F, A, C and E). From Fmaj7 in root position, the closest way to reach G7 is its third inversion (F, G, B and D, lowest note first): one note stays where it is, and the others move 5 semitones in total, counting each note against the note in the same place from the bottom.

Look at the top three notes of G7: B, D and F make a B diminished chord (B, D and F). A dominant 7th is a diminished triad with the root added underneath.

What G7 sounds like

The dominant 7th is restless. Its tritone between B and F pulls toward a resolution, and the chord most naturally moves to C, a fifth below G. It is the sound of the blues too, where every chord can be a dominant 7th.

Here G7 is the V7 chord in C major and the VII7 chord in A minor. In a 12-bar blues in G the three chords are G7, C7 and D7. In minor keys the same chord appears as V7 of C minor, using the raised seventh of the harmonic minor scale.

A common mistake with G7

A common mistake is pressing F# instead of F on top, one semitone higher than the seventh of G7. That gives Gmaj7 (G, B, D and F#), which sounds soft where G7 sounds restless. Check the top note: it should be the lower of the two keys.

Chords to learn next

Chords close to G7: G major (the same chord without the seventh; shares G, B and D); Gmaj7 (a major seventh instead; shares G, B and D); Gm7 (a minor third instead; shares G, D and F); C major (the chord it leads to; shares G).

Once G7 feels easy, play it and then C major to hear the chord resolve. For chords beyond these six types, and for guitar and ukulele shapes, use the chord finder. To play along with your computer keys, open the virtual piano. The piano chords page lists all 72 chords.