Musical pitch calculator

Convert equal-tempered numbers and frequencies with nearest notes, enharmonic names and cents.

Your input

Outputs are cleared when the input changes.

Result

Enter your data or use the example, then run the tool.

Worked example

MIDI 69 gives 440 Hz and MIDI 81 gives 880 Hz by default; 466.1638 Hz is approximately A#4/Bb4.

Method

Use f = A4 × 2^((n−69)/12), invert with logarithms, then find the nearest integer note and cents. C4 is MIDI 60.

Limits

Twelve-tone equal temperament only, not microphone tuning, diagnosis or health claims about a reference frequency.

Sources

UNSW note names, MIDI and frequency

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