# Why is the chair conformation of cyclohexane stable?

The carbons in cyclohexane are all $s {p}^{3}$ hybridized. The ideal angle between atoms connected to anything that is $s {p}^{3}$ hybridized is 109.5 degrees. In a chair conformation, the angles of all the atoms in the ring can adopt this positioning, and thus the molecule does not experience any ring or angle strain.