How many sharps or flats are in the d-flat concert scale and what they?

There are five flats in the D-flat concert scale. These flats are:

• B-flat

• E-flat

• A-flat

• D-flat

• G-flat

The D-Flat major scale (Db major) is written using five flats in its key signature: Bb, Eb, Ab, Db and Gb.