Tools/Note to Frequency

Note to Frequency Converter

Convert between note names, MIDI note numbers, and frequencies in Hz. Supports any A4 tuning reference — standard is 440 Hz.

Hz
Note name → Hz
440.000HzMIDI 69
Hz → Note name
MIDI number → Note + Hz
Common reference notes
C3MIDI 48130.81 Hz
A3MIDI 57220.00 Hz
C4 (middle C)MIDI 60261.63 Hz
A4 (concert A)MIDI 69440.00 Hz
C5MIDI 72523.25 Hz
A5MIDI 81880.00 Hz
Related Tools
BPM Calculator →EQ Frequency Chart →
Encyclopaedia
Equal temperament →MIDI →