Does anyone know how long it takes a spider egg to hatch? I have no clue the type of spider.?

Answer 1

What mangidabx said, but also I would add that many people mistake the spider's egg-sac (the silk ball or oval within which the eggs are contained) for some sort of "spider egg". The eggs inside the sac may hatch well before the spiderlings leave the sac to disperse. Often the egg-sac can be used to make a guess at the kind of spider that made it - size, shape, color, whether it's in a web, and if so, what kind, and other factors can be pretty distinctive.

Answer 2

It's impossible to answer this question except in a very general
way without knowing the kind of spider and at what time of
year the eggs were laid. At high temperatures during spring
and summer the eggs may hatch in a week or so. Eggs laid
in the fall may not hatch until the following spring in temperate
climates. Also, the larger the spider the longer the time until
hatching.