When do babies go from two naps to one nap?

I was just wondering when most babies make this transition. I don't think my 10.5m old is ready yet b/c he gets tired within 3 hours of waking +/- 30min. Plus he usually goes right down with the exception of a couple times he'll talk for a while. But today he refused his morning nap, but he was just diagnosed with and ear infection yesterday and is not feeling good. I'm thinking this is why he didn't want to lay down.

When do babies go from two naps to one nap?
it really depends on the child, my oldest went to one nap a day when he was around 16 months, my youngest is still on 2 naps a day and he's 16 months. it also depends on their daily schedule.
Reply:Usually around 18 months.
Reply:my daughter is almost 11 months and sleeps at lunch and then goes to bed at 7 and she has one nap
Reply:my daughter is 11 months she has one nap of 2 hours around 11am-1pm,then bed at 7. this started just a couple of weeks ago. tho she isnt losing her sleep bcos she used to sleep for an hour at 11am-12pm then have another hour at 4-5pm then bed at 8, she jus does it in one nap rather then 2
Reply:My Son took two naps a day woke up at 6am nap from 8-10 then another nap from 2-4 then went to bed for the night at 6pm...Starting at 15months he is still on the 6am-6pm schedule but takes one nap from 10am-12pm