Minor fifth

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Minor fifth
Inverse Major fourth
Abbreviation m5
Semitones ~6½
Interval class ~5½
Just interval 64:45
Just intonation 609.77

In music, a minor fifth (About this sound Play ) is the interval from the quarter tone scale, named by Ivan Wyschnegradsky, between the diminished fifth (600 cents) and the perfect fifth (700 cents) and thus 650 cents (Ghalf flat). It inverts to a major fourth.

The term may also be applied to the ratio 64:45 (G-) or 609.77 cents (About this sound Play ), formed from the perfect fourth (4/3 = 498.04) and the major semitone (16/15 = 111.73),[1] which is sharp of the ET tritone, which is 600 cents.

See also[edit]


  1. ^ Richard Mackenzie Bacon (1821). "Manuscript Work of Francesco Bianchl", The Quarterly Musical Magazine and Review, Volume 3, p.56.