22/7

22/7 may refer to:

The number $22/7$ as an approximation of $\pi$

 * Approximations of π
 * Proof that $22/7$ exceeds π

Days of the year

 * July 22
 * "Pi Approximation Day" or "π Approximation Day"

People

 * 22/7 (group), a Japanese idol group
 * 22/7 (TV series), Japanese anime series based on the idol group