D♯5 / E♭5
Reviewed for accuracy · Maintained by Justin Evans
D♯5 highlighted — use the view toggle to see all 88 keys.
Piano key
55 of 88
Octave
5
Frequency
622.25 Hz
MIDI number
75
Key color
Black key
Pitch class
D# · Eb · Fbb
What is D♯5?
D♯5 is the D♯ in octave 5 — the 55th key of the 88 on a full-size piano, counted from the bottom. In standard tuning it sounds at 622.25 Hz. It sits 15 half-steps above middle C (C4).
To find it, locate any group of two black keys: the white key just to their left is a C. Count up from middle C (C4) 1 octave to reach octave 5, then step to D♯.
Every octave doubles the frequency: the D♯ one octave up sounds at 1244.5 Hz and the one below at 311.13 Hz. The same piano key can be written as D#, Eb, Fbb depending on the musical context — same sound, different spelling.
Nearby notes
Every D♯ on the keyboard: