C#7 chord

The C#7 chord (C# dominant seventh, also written Db7) on a piano: the notes, every inversion and the keys it belongs to. Tap play to hear it, and download it as MIDI.

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C#1E#= F3G#5Bb7

About the dominant seventh chord

A major chord with a minor seventh on top. It has tension that wants to resolve, usually to the chord a fifth below.

Formula: 1 3 5 b7. Used in: Blues, funk, disco, jazz and soulful house.

C#7 inversions

Tap an inversion to hear it. Inversions keep the same notes in a different order, which lets chords move smoothly from one to the next.

Keys with C#7

C#7 is the V chord in F# major and VII chord in Eb minor.

It also appears in Ab Dorian (IV), Bb Phrygian (III), B Lydian (II), C# Mixolydian (I).

Build a progression around it in the chord progression generator.

More C# chords

Other dominant seventh chords

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Questions

What notes are in a C#7 chord?

C#, E# (F), G#, B.

What is the formula of a dominant seventh chord?

1 3 5 b7. A major chord with a minor seventh on top. It has tension that wants to resolve, usually to the chord a fifth below.

What key is C#7 in?

C#7 is a chord in F# major (V), Eb minor (VII).

Is C#7 the same as Db7?

Yes. C# and Db are the same key on the piano, so the chords sound the same. Which name is used depends on the key of the song.