I'd say about a week or so. Hard boiled eggs have much shorter shelf life even if placed in the fridge because they are now in a sense, cooked. If you leave a hard boiled egg in the fridge for too long the gas pressure inside will increase and this is what rots the egg. But don't expect hard boiled eggs to reach a week without spoiling every time. Once they begin to smell even after just a few days, its better to get rid of them.
answered Jun 21 '11 at 22:45