F#m7b5 chord (F sharp half-diminished seventh) on guitar
F#m7b5 (F sharp half-diminished seventh) has four notes: F sharp, A, C and E. Its formula is 1, b3, b5, b7. In major keys, F#m7b5 is the viiø7 chord in G major.
F#m7b5 chord shapes
Fingers: 2 on E, 3 on D, 4 on G, 1 on B.
Fingers: 4 on D, 2 on G, 1 on B.
Finger 1 barres fret 2, then 2 on A, 4 on B.
Finger 1 barres fret 2, then 2 on A, 4 on B, 4 on e.
Fingers: 1 on D, 2 on G, 3 on B, 4 on e.
Finger 1 barres fret 7, then 3 on A, 4 on G, 2 on e.
Hear it and see every shape in ScaleSpace →
| Symbol | F#m7b5 |
|---|---|
| Also written | F#ø, F#ø7, F#min7b5, F#-7b5 |
| Notes | F# A C E |
| Formula | 1 b3 b5 b7 |
| Intervals | root, minor third, tritone, minor seventh |
| Type | Half-diminished seventh chord |
F#m7b5 across the neck
Guitar · 6-string, tuned low to high: E, A, D, G, B, e. 24 frets.
- E string: fret 0 E (flat 7), fret 2 F# (1), fret 5 A (flat 3), fret 8 C (flat 5), fret 12 E (flat 7), fret 14 F# (1), fret 17 A (flat 3), fret 20 C (flat 5), fret 24 E (flat 7).
- A string: fret 0 A (flat 3), fret 3 C (flat 5), fret 7 E (flat 7), fret 9 F# (1), fret 12 A (flat 3), fret 15 C (flat 5), fret 19 E (flat 7), fret 21 F# (1), fret 24 A (flat 3).
- D string: fret 2 E (flat 7), fret 4 F# (1), fret 7 A (flat 3), fret 10 C (flat 5), fret 14 E (flat 7), fret 16 F# (1), fret 19 A (flat 3), fret 22 C (flat 5).
- G string: fret 2 A (flat 3), fret 5 C (flat 5), fret 9 E (flat 7), fret 11 F# (1), fret 14 A (flat 3), fret 17 C (flat 5), fret 21 E (flat 7), fret 23 F# (1).
- B string: fret 1 C (flat 5), fret 5 E (flat 7), fret 7 F# (1), fret 10 A (flat 3), fret 13 C (flat 5), fret 17 E (flat 7), fret 19 F# (1), fret 22 A (flat 3).
- e string: fret 0 E (flat 7), fret 2 F# (1), fret 5 A (flat 3), fret 8 C (flat 5), fret 12 E (flat 7), fret 14 F# (1), fret 17 A (flat 3), fret 20 C (flat 5), fret 24 E (flat 7).
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Questions
What notes are in the F#m7b5 chord?
F#m7b5 (F sharp half-diminished seventh) has four notes: F sharp, A, C and E. Its formula is 1, b3, b5, b7. F# is the root, A is the minor third, C is the tritone and E is the minor seventh.
How do you play F#m7b5 on guitar?
The easiest shape is 202210. Fingers: 2 on E, 3 on D, 4 on G, 1 on B.
What key is F#m7b5 in?
In major keys, F#m7b5 is the viiø7 chord in G major. It is diatonic to those keys, so it fits songs in any of them.
What is the difference between F#m7b5 and F#dim7?
F#m7b5 and F#dim7 share F#, A and C. F#m7b5 has E, the flat 7th, where F#dim7 has Eb, the double flat 7th.