C3 frequency
In standard tuning (A4 = 440 Hz), C3 is 130.81 Hz. It's MIDI note 48 and key 28 of 88 on a piano.
| Frequency | 130.81 Hz |
| Period | 7.645 ms |
| Wavelength in air | 2.62 m |
| One octave down | C2 · 65.41 Hz |
| One octave up | C4 · 261.63 Hz |
| At A4 = 432 Hz | 128.43 Hz |
C3 is within the usual range of piano, guitar, bass guitar, viola, cello, a bass voice and a tenor voice.
See every note on the note frequency chart, or train your ear to recognise notes like this one in the course.
Questions
What is the frequency of C3?
130.81 Hz in standard tuning, where A4 is 440 Hz.
What is C3 at 432 Hz tuning?
If A4 is tuned to 432 Hz, C3 becomes 128.43 Hz.
Which octave is C3 in?
Octave 3. Octaves are numbered from C, so C3 sits below middle C (C4).
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