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Octave
Conversions to other units
1 octave | 12 semitones | 2.4 perfect fourths | 1.714 perfect fifths
Conversions from other units
1 semitone | 0.08333 octaves 1 perfect fourth | 0.4167 octaves 1 perfect fifth | 0.5833 octaves
Unit usage
music interval
Basic unit dimensions
[semitone]
Example music interval
octave built on C_4
C_4 | C_5
C_4 | 261.626 Hz (hertz) C_5 | 523.251 Hz (hertz) (with middle A tuned to 440 hertz)
60 | 72
Corresponding inverted interval
octave