A piano reference: chords, scales, theory & ear training.
/
Chord · Reference entry
B♭ Minor 11th
Minor 11th · B♭ – D♭ – F – A♭ – C – E♭ · intervals P1-m3-P5-m7-M9-P11
The B♭ Minor 11th chord (B♭m11) contains the notes B♭, D♭, F, A♭, C, and E♭. Its interval formula is R-m3-P5-m7-M9-P11. A minor 9th plus the 11th — rich and modern, common in jazz fusion and contemporary R&B.
=A♯ Minor 11th›
This is the same chord as A♯ Minor 11th — the same keys on the keyboard, spelled with sharps.
Maintained for accuracy · Last updated July 2026 · How we review
Flashcards · Chord
Three questions on B♭ Minor 11th
Answer on the keyboard, not with buttons. No login required.
B♭m11
The B♭ Minor 11th chord is a six-note chord made up of B♭, D♭, F, A♭, C, and E♭. It is built from a root, minor third, perfect fifth, minor seventh, major ninth, and perfect eleventh.
Construction
B♭ Minor 11th = Root + Minor 3rd + Perfect 5th + Minor 7th + Major 2nd + Perfect 4th = B♭ · D♭ · F · A♭ · C · E♭
Note
Interval
Degree
B♭
Root
1
D♭
Minor 3rd
♭3
F
Perfect 5th
5
A♭
Minor 7th
♭7
C
Major 2nd
9
E♭
Perfect 4th
11
Key Signature
A chord has no key signature of its own, but the B♭ Minor 11th is the tonic (i) chord of Bb Minor, which shares the signature of its relative major, Db Major — 5 flats (B♭, E♭, A♭, D♭, G♭).
B♭E♭A♭D♭G♭
Order of flats
Flats are added in a fixed order — the reverse of the sharp order. Each new flat key adds the next flat on the list.
B♭E♭A♭D♭G♭C♭F♭
Mnemonic:Battle Ends And Down Goes Charles’ Father
Chords in the Key of B♭ Minor
These are the triads built on each degree of the B♭ minor scale:
The notes B♭ – D♭ – F – A♭ – C – E♭ aren’t exclusive to this chord. Depending on which note is the bass and how the chord functions, the same pitches also spell:
Keep going with the Minor 11th chord — these pages cover the underlying theory, the connected reference material, and the practice tools that work with this chord.
The note names, intervals, fingering, and harmony on this chord page are grounded in the following sources. Public domain treatises and scores are linked to their full text; primary data is piano.org's own interval-derived reference dataset — continuously maintained and human-verified, with no fixed publication date.