E3
E3 highlighted — use the view toggle to see all 88 keys.
Piano key
32 of 88
Octave
3
Frequency
164.81 Hz
MIDI number
52
Key color
White key
Pitch class
E, Fb, D##
What is E3?
E3 is the E in octave 3 — the 32nd key of the 88 on a full-size piano, counted from the bottom. In standard tuning it sounds at 164.81 Hz. It sits 8 half-steps below middle C (C4).
To find it, locate any group of two black keys: the white key just to their left is a C. Count down from middle C (C4) 1 octave to reach octave 3, then step to E.
Every octave doubles the frequency: the E one octave up sounds at 329.62 Hz and the one below at 82.41 Hz. The same piano key can be written as E, Fb, D## depending on the musical context — same sound, different spelling.
Nearby notes
Every E on the keyboard: