J sleeps from 815 to 7am. Sometimes he wakes at 630 or 8 though. But I'd say 815 to 7 is most common.
Eta: no nap, just quiet time. He naps every so often but that's maybe once every few weeks. He had a spurt a month or two ago where he was napping most days but I think k it's was a growth spurt. So 11 hrs a day on average.
DD1 sleeps about 12.5 hours at night (6:30-7). Her naps are all over the place though. She mostly doesn't sleep but 1 to 3 days a week, she sleeps 1-3 hours.
DS2 just turned 3 and sleeps about 10 hours at night and about a 2 hour nap. So around 12 hours total.
DS1 is 4.5 and sleeps 10 hours at night. I think he'd sleep in longer in the morning if he didn't share a room with his brother. Sometimes if we hear DS2 wake up and get him out of their room right away, DS1 will sleep at least another 30-45mins longer.
No nap- goes to bed at 7pm (falls asleep quickly) and gets up around 7am. With a nap- goes to bed at 8pm (falls asleep around 8:30-9pm) and gets up around 7am.
So it averages out to around 12hrs a day, mostly all at night.