The age that you stop putting your child in diapers is when they are between the ages of 3 to 4 years old or when they are potty trained.
Some children are potty trained before age 3 and some by age 18 months to 2 years old.
The age at which children are potty trained and stop wearing diapers varies depending on the child as all children are different.
While one child may be ready to potty train at 18 months to 2 years of age, some children may not be ready to potty train and stop wearing diapers until age 3 to 4 years old.
And in some cases a child may not be fully out of diapers and be potty trained until they are 5 years old or 5 and 1/2 years old.
There's no set age that a child has to be potty trained by and it's really up to the child as to when they will get out of diapers.
If you wait until the child is at least 3 years old or 3 and 1/2 the potty training for the child usually is faster and goes much smoother without many accidents.
Potty training before 3 years old means that you will be dealing with a lot of wet pants and pooped in pants as well as furniture floors etc.
Keep the child in diapers until they are ready and don't force them into potty training too early as it can lead to more problems.
If your child is refusing to potty train then you should wait a few months to try again.