Musical Note ↔ Frequency

Translate standard musical notes and octaves to precise audio hertz frequencies.

Reference Tuning

🎹 Interactive Piano / Pitch Generator

Interactive Octave Segment (4)
Tone OutputRef: A4=440Hz
A4Calculated Pitch Frequency
Frequency ➔ Musical NoteDetect closest musical note for any given input Hertz frequency
Closest Pitch
A4Perfect
MATHEMATICAL FORMULA:The equal temperament frequency formula is: $f = f_0 \times 2^(n/12)$ where $f_0$ is the A4 calibration frequency (440Hz), and $n$ is the count of semitones away from A4. Detuning offsets are measured in cents, where 100 cents = 1 semitone.

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