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NOTE A4

Frequency and musical information for A4

440.00 Hz
MIDI Note: 69
Standard tuning (A4 = 440 Hz)

PIANO KEYBOARD

C
262
C#
277
D
294
D#
311
E
330
F
349
F#
370
G
392
G#
415
A
440
A#
466
B
494
Octave 4

NEARBY NOTES

NOTEFREQUENCYINTERVAL
F#4369.99 Hz-3 (3 semitones)
G4392.00 Hz-2 (Whole tone)
G#4415.30 Hz-1 (Semitone)
A#4466.16 Hz+1 (Semitone)
B4493.88 Hz+2 (Whole tone)
C5523.25 Hz+3 (3 semitones)

MUSICAL CONTEXT

Note: A4

Frequency: 440.00 Hz

MIDI Number: 69

Octave: 4

This is the standard concert pitch reference frequency.

VIEW 440 HZ PAGECALCULATOR