Octave 2 Piano Notes — Frequencies & Keys

12 keys from C2 (65.41 Hz) to B2 (123.47 Hz).

Note	Frequency	MIDI	Key
C2	65.41 Hz	36	16 of 88
C#2	69.30 Hz	37	17 of 88
D2	73.42 Hz	38	18 of 88
D#2	77.78 Hz	39	19 of 88
E2	82.41 Hz	40	20 of 88
F2	87.31 Hz	41	21 of 88
F#2	92.50 Hz	42	22 of 88
G2	98.00 Hz	43	23 of 88
G#2	103.83 Hz	44	24 of 88
A2	110.00 Hz	45	25 of 88
A#2	116.54 Hz	46	26 of 88
B2	123.47 Hz	47	27 of 88

Octave 1 · A4 Reference · Octave 3

A440 Guide · Free Piano