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Audio Pitch Frequency (Hz) to Musical Note Converter
Translate raw acoustic frequencies (Hz) into standard musical note names, octaves, MIDI note numbers, and pitch deviation in cents with audio playback.
Hz
A4
0 Cents (Exact Match)
MIDI Note Number
69
Exact Note Freq
440.00 Hz
Air Wavelength
78.0 cm
Frequently Asked Questions
Common questions about Audio Pitch Frequency (Hz) to Musical Note Converter, audio processing, and usage.
The formula is MIDI Note = 69 + 12 × log2(Frequency / 440). For example, 440 Hz yields MIDI 69, which corresponds to note A in octave 4 (A4).
A cent is 1/100th of a musical semitone. A deviation of +15 cents means the frequency is slightly sharp compared to the exact equal-tempered pitch.
Yes, click the "Listen to Pitch" button to synthesize the exact frequency using the Web Audio API.
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