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Semitone ↔ Frequency

Convert any frequency to its semitone offset and note name from A4.

Semitones from A4

0.000

Nearest semitone

0 st

Cents off

0.0 ¢

Note name

C4

Note

12-tone equal temperament; just-intonation intervals are wider.

About this tool

Inputs: frequency, reference A4. Outputs: semitones from A4, nearest semitone, cents off, note name. Targets r/audio 'pitch octaves between semitones' thread.

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