The sleep chart that Mrs. High Heels linked to in her post today is a really great guideline. But I found that my kids always needed more sleep than what was on the chart.
Olive is 11 months old (almost 12) and sleeps 15-16 hours in a 24 hour period.
Charlie will be 3 in 2 1/2 months, and usually sleeps 13 hours in a 24 hour period during the week. Sometimes on weekends he skips his nap so he sleeps longer at night and gets 12 hours of sleep, or he takes a long nap and gets 14 hours of sleep.
What about your LO?