25/16

25/16, the classic augmented fifth, is the interval obtained by stacking two 5/4 major thirds, however, it gains additional isoharmonic identity from its position between 11/8 and 7/4, so it can frequently be used in conjunction with those.

Interval information

Ratio	25/16
Factorization	2-4 × 52
Monzo	[-4 0 2⟩
Size in cents	772.6274¢
Name	classic augmented fifth
Color name	yy5, yoyo 5th
FJS name	[math]\displaystyle{ \text{A5}^{5,5} }[/math]
Special properties	reduced, reduced harmonic
Tenney norm (log2 nd)	8.64386
Weil norm (log2 max(n, d))	9.28771
Wilson norm (sopfr(nd))	18
[sound info]
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See also

• 32/25 – its octave complement