  We propose a closed formula of the universal part of supersymmetric R\'enyi
entropy $S_q$ for $(2,0)$ superconformal theories in six-dimensions. We show
that $S_q$ across a spherical entangling surface is a cubic polynomial of
$\gamma:=1/q$, with all coefficients expressed in terms of the newly discovered
Weyl anomalies $a$ and $c$. This is equivalent to a similar statement of the
supersymmetric free energy on conic (or squashed) six-sphere. We first obtain
the closed formula by promoting the free tensor multiplet result and then
provide an independent derivation by assuming that $S_q$ can be written as a
linear combination of 't Hooft anomaly coefficients. We discuss a possible
lower bound ${a\over c}\geq {3\over 7}$ implied by our result.
