Average age to be potty trained??

[wickedthemusical]

Just wondering what the average age for a child to be potty trained is? My DH has a DS who is 4 and still in nappies, I am pregnant and don't want my DC to still be in nappies when they start school, or is this a normal thing? Not being negative in any way to my DHs DS they have an agreement that works for them but wouldn't be what I would choose so just need some advice.

My boys were 3.5 and dry at night by 4.5

In my limited experience (from my huge family and my time as a nanny) boys tend to be later than girls. Average for girls was mid-2's and the boys were nearer 3.5 with some ongoing nighttime accidents.

My son is fully dry day and night at 3years 9 months- I tried so many things earlier on but he just got it when he got it. No gimmicks he just started to tell us more often and copy us.

Honestly give them guidance but they will come full circle when ready x