In a 24-hour period? Total? Ferber says the range is 11-12 hours for this age. We've always found that our girls fall within the ranges that are listed in his book (and NOT the ranges in the Baby 411/Toddler 411 books, which seem inflated).
But - why does it seem like all my friends have toddlers who need more sleep than ours? Maybe this belongs in the BP!
That means that since ours nap 2 hours at daycare, then they only sleep 9-9.5 hours at night (putting us right at 11-11.5 hours total, which is in the normal range). Which means putting them to bed at 9, and wake at 6-6:30. 9pm seems SO late for bedtime. But we've had an earlier bedtime (8:30) and nearly every night we deal about 30 minutes worth of wakings. So now we're trying a 9pm bedtime in hopes of consolidating their nighttime sleep into one "chunk" so we can all sleep through the night.
Maybe I would just feel better knowing there are others out there whose toddlers require "only" 11 hours of sleep (even if that's supposedly normal).