The percentage of 4 year olds that are not potty trained is between 2 percent to 3 percent of 4 year olds.
The majority of 4 year olds are potty trained although 2 to 3 percent of those 4 year olds are not potty trained at all and are still in diapers full time or pull ups.
Around 1 percent of 5 year olds are not potty trained and still in diapers.
The average age for potty training kids is between 18 months to 2 years of age although some kids don't potty train until the ages of 3 years old or even near 4 years old.
And some kids are not potty trained until at least 5 years old which is okay.
That is for most kids who are ready to potty train at those ages.
Some kids are ready to potty train and get out of diapers as early as age 18 months and are fully potty trained by 2 years old.
The child may still need to wear diapers at night for bed wetting but they should be able to go all day without a diaper.
Some kids may not potty train and be out of diapers until age 3 years old to as late as 4 years old.
A kid will eventually potty train when they are ready.
It's normal for a kid to need to wear diapers for bed wetting from age 3 to as late as age 8 years old and even older.
Some kids will continue to wet the bed for quite awhile and it's normal and some kids may wet the bed until age 17 or 18 years old and some people wet the bed all their lives and that is also normal.
Forcing potty training too early can be harmful to the child's health because they may try to hold in their poop or pee and that can lead to kidney and bowel issues.
There's really not a set age when a kid should begin potty training or for them to be potty trained.
A kid should wear diapers until they are ready to use the toilet.
Some kids are ready to potty train by 18 months while some are not ready to potty train until 3 years to 4 years old and in some cases some kids may not be ready to potty train until 5 years old.