13/9

Interval information

Ratio	13/9
Factorization	3-2 × 13
Monzo	[0 -2 0 0 0 1⟩
Size in cents	636.6177¢
Names	tridecimal diminished fifth, high tritone
Color name	3o5, tho 5th
FJS name	[math]\displaystyle{ \text{d5}^{13} }[/math]
Special properties	reduced
Tenney height (log2 nd)	6.87036
Weil height (log2 max(n, d))	7.40088
Wilson height (sopfr(nd))	19
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In 13-limit just intonation, 13/9, the tridecimal diminished fifth is a high tritone measuring about 636.6¢. It appears between the 9th and 13th harmonics of the harmonic series. Its inversion is 18/13, a low tritone.

See also

• 18/13 – its octave complement
• 27/26 – its fifth complement
• Gallery of just intervals