My almost 3 year old boy was potty trained at a little past 2 1/2. Now saying that I will say this. I used to teach a daycare class of about 16 kids ages 2 1/2 to 3 1/2. It was called the potty training room... kids all train differently and boys are usually later to train than girls. I had boys in my class that didn't train until they were almost 3 1/2.
http://www.circleofmoms.com/stay-at-home-moms/what-s-the-average-age-your-boy-was-potty-trained-140062
Potty training varies on your own personal methods and your own beliefs. I can see benefits to training infants and toddlers. According to experts it takes 8-10 months from the start to be diaper free. Most girls are diaper free in the US by 36 months and most boys in the US by 39 months. So between 26 (for girls) and 29 (for boys) months statically most parents are starting their training.
https://www.babycenter.com/400_at-what-age-do-you-begin-potty-training_955197_888.bc
So many mothers are upset at the idea of infant potty training when that's the norm around the world! In our country, a whopping 95% of babies were potty trained by 18 months until the 1960s. It's not cruel to sit your baby on their little potty when they have to go to the bathroom.
https://www.babycenter.com/400_at-what-age-do-you-begin-potty-training_955197_888.bc
On average, a girl is ready to be potty trained at approximately 29 months of age, says the University of Michigan Health System, compared to 31 months for the average boy.
http://www.livestrong.com/article/121054-average-age-potty-training-girls/
DS1 was trained in 1 week at the age of 2 years 2 months old. My son was potty trained just before age 2. He initiated training himself and was day and night trained in about a week. I used cloth diapers which I think helped. He never liked the little potty chair and used the big toilet right away.
http://www.circleofmoms.com/stay-at-home-moms/what-s-the-average-age-your-boy-was-potty-trained-140062
Lucky for you, experts say girls potty train earlier than boys because girls aren't as easily distracted. Kids with older siblings to look up to and imitate may be easier to toilet train, too. The key to potty training success is starting only when your daughter is truly able to do so. While some kids can start as young as 18 months, others may not be prepared to learn until they're 3 or 4.
https://www.babycenter.com/0_successful-potty-training-for-girls_11653.bc
Potty Training Around Age 3. Around 36 months: Most children make the potty training leap around their third birthday – 40 to 60 percent of children are completely potty trained by 36 months of age (American Family Physician). However, some children won’t be trained until after they are 31/2.
https://www.pull-ups.com/en-us/potty-training/when-to-start/timeline
How to tell when it's time to potty train your child, training girls versus boys, 10 steps to potty training, and more. Potty training in 10 steps. Potty training will go much more smoothly if you know the basics and follow these simple steps. Potty training: What works.
https://www.babycenter.com/0_successful-potty-training-for-girls_11653.bc
The age for potty training is rising. In the 1940s, the average age for potty training was 18 months. Averages today, according to a 2001 study by Schum, show baby boys in the United States give up diapers at 39 months and girls at 35 months. And that may be a good thing.
http://www.webmd.com/parenting/features/potty-training-seven-surprising-facts
Potty Training Around Age 3. 1  Around 36 months: Most children make the potty training leap around their third birthday – 40 to 60 percent of children are completely potty trained by 36 months of age (American Family Physician). 2  Between 3 and 4 years old: Your journey is not over yet.
https://www.pull-ups.com/en-us/potty-training/when-to-start/timeline
at what age do girls potty train
Girls potty train at the age of 29 months. Girls are trained for potty at 29 months of age.