How late can you ovulate in a cycle?

I have read from many online sources that you can expect to have ovulated from between 10-16 days before your next period starts. Since you can only get pregnant within a small window of time after ovulation (between 12-36 hours) this question is all dependent on how long your cycle is, how regular you are etc. If you have the standard 28 day cycle, you could ovulate anywhere between cycle days 12-18 (if my math is correct) but this could vary greatly if your cycle is longer. Basically subtract 16 days from your standard cycle length to get the soonest you could have ovulated and 10 days to get the latest you could have ovulated.