How can I tell if a basketball is properly inflated?

Also how much grip should be on an official basketball.How can I tell if a basketball is properly inflated?
If you throw it up in the air and it bounces above your waist.

Grips of the ball differs from the brand. I recommend Spalding Never-Flat. They last a long time. Or if you're playing inside a gym, get a wilson ball.How can I tell if a basketball is properly inflated?
if you hold it above your waist and use no forse and just drop it and it comes close to the same spot it should be properly inflated and it should have a good amount of grip