How Long does Cider Fermentation take?

Do you have an airlock? A good indicator is when the bubbling slows way down again. I'd give it a taste once you think its done, since the end flavor is all up to you anyway, and you can decide whether to leave it for longer or not at that point.

Even though you can pick up a hydrometer for around 7 USD, I don't think I'd even trust you with one. You are a danger to yourself and others.

Hahaha, I was trying to hold back posting comments like those...I feel better now that you guys have said them.

Well, negative comments aside (as they've already been shared haha) buy a hydrometer. Why do you say you don't plan on buying one? They're quite cheap and I have no idea why someone would be against using one.

Fermentation times rely on the conditions of fermentation. You say people keep turning the heat off, heat fluctuations are bad but not killer for brewing, but the cooler the temps the slower the fermentation. However, some people argue that fermenting at the lower end of a yeasts tolerance creates a cleaner brew. Without the proper equipment there really isn't any definites as to when it is done. Airlock activity will give you implications, but bubbling could occur with and without fermentation and fermentation could occur with and without bubbling.

Oh my god Tone Def that was hilarious! I'm going to be using that in the future for sure. martaino, just keep the carboy next to the refrigerator. The heat coming off the bottom/sides of the fridge will help keep it warm enough. Unless it's getting down into the 40's I think the yeast will be fine.