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Chord · Bb Minor 7th

Bm7 Chord

Bm7 is Bb, Db, F and Absmooth, mellow. The ii in ii-V-I.

Hear it

Bm7 on every instrument

The same 4 notes, 6 sets of hands. Open a diagram for alternate shapes, audio and the mistakes to avoid.

×13121EADGBE
Guitar2 voicings
CDEFGAB
Piano3 voicings
1111GCEA
Ukulele2 voicings
6fr1311EADG
Bass1 voicing
1123GDAE
Mandolin1 voicing
×2fr4213GDGBD
Banjo1 voicing

What Bm7 is made of

Bb Minor 7th (Bb minor 7th) is built from the notes Bb, Db, F, Ab, with the interval pattern 1, b3, 5, b7. A common minor 7th chord across many styles.

Stack 1, b3, 5 and b7 on a root of B and you get Bb, Db, F and Ab. That interval recipe is what makes the chord a minor seventh chord — move the same shape to another root and the character travels with it, which is why Cm7 sounds like a transposed Bm7.

Minor 7th: Smooth, mellow. The ii in ii-V-I.

Spelling: the notes above are written the way a score would write them, not simplified to the nearest piano key. That is why this chord is spelled with B rather than its enharmonic equivalent.

Keys that contain Bm7

All 4 notes sit inside the scale of 10 keys. The roman numeral marks the degree the chord is rooted on.

Other chords on B

Same root, different colour.

The same minor seventh shape, moved

The identical interval recipe, built on other roots.

Questions people ask about Bbm7

What notes are in the Bbm7 chord?
Bbm7 is made of Bb, Db, F and Ab — the 1, b3, 5 and b7 degrees of a minor seventh chord built on Bb.
What keys use the Bbm7 chord?
Every note of Bbm7 belongs to 10 keys: Ab Major (ii), Db Major (vi), F# Major (iii), Gb Major (iii), C# Major (vi), F Minor (iv), Bb Minor (i), D# Minor (v), Eb Minor (v), A# Minor (i). The roman numeral is the scale degree the chord is rooted on.
How do you play Bbm7 on guitar and piano?
This page shows Bbm7 on guitar, piano, ukulele, bass, mandolin and banjo — 10 voicings in total. Each diagram links to the full instrument page with alternate shapes, audio and common mistakes.
Is Bbm7 the same as A#m7?
Yes. Bbm7 and A#m7 are enharmonic — identical pitches written two different ways. Which spelling you use depends on the key you are in; Bbm7 is the spelling this site treats as canonical.

Learn the theory behind it

Why Bm7 behaves the way it does — the guides that explain the chord instead of just spelling it.

Barre Chords — The Wall Every Guitarist ClimbsThis one asks for a barre. The article is the fix for the buzzing and the aching hand.7 min readFunctional Harmony: Three Roles, One EngineWhat a seventh chord is for — tension, resolution, and the seat it takes in the key.6 min readThe 12-Bar Blues — Three Chords, A Century of HitsSeventh chords are the whole sound of the blues. Twelve bars is where to hear it.7 min read