D minor has 1 flat — B♭. Here's the signature on the staff, the full scale, its relative major, and the trick to recognize it instantly.
Go further
400+ questions, seven free lessons, ear training, and progress tracking — 100% private: no account, no data collected.
D minor borrows its 1 flat straight from its relative major, F major. Beyond the signature, minor keys typically raise the seventh degree into a leading tone, so expect an extra accidental in the music that the key signature never shows.
The D minor scale runs D, E, F, G, A, B♭, C. Every flattened note in the piece takes the key's accidentals automatically, which is exactly what the signature saves you from writing note by note.
D minor shares its signature — 1 flat — with its relative major, F major, a minor third above the tonic. They use the same seven pitches; what tells them apart is which note the music settles on and treats as home.
D minor has 1 flat — B♭.
The relative major of D minor is F major — it shares the identical key signature (1 flat).
The D minor scale is D, E, F, G, A, B♭, C.
Keep practicing: key signature quiz · circle of fifths · key trainer
Go further
400+ questions, seven free lessons, ear training, and progress tracking — 100% private: no account, no data collected.