How many push ups do you do to lose weight?

You have to burn about 3500 calories to burn 1 pound.

Assuming that doing 15 pushups burns 1 calorie (I am making this number up - it might be more pushups or less pushups)

It would take ~52,500 pushups!

The problem with this - if you did that many pushups you would actually gain some lean muscle mass - means you may not even lose any weight! But don't worry, lean muscle mass is good!