Most countries train children between 18 months and 3 years, but the age varies significantly, with some cultures starting as early as 12 months (often without disposable diapers), while Western countries, influenced by disposables, now often see training begin closer to 3 years, with children usually finished by age 4. The key factor is the child's readiness, not a universal age.
In the US and Europe, training normally starts between 21 and 36 months, with only 40 to 60% of children trained by 36 months.
Toilet training begins very early in China, sometimes within days of birth and usually no later than a month. Frequently babies are held closely by parents, grandparents or other extended family members caring for them, sensitive to when they need to relieve themselves.
Most kids start to show readiness for daytime potty training between 18 months and 3 years old, with the majority being trained by age 3 or 3.5, though nighttime training often takes longer, sometimes until age 4 or 7. The key is waiting for signs of readiness (awareness of needing to go, desire to be clean), not a specific age, as every child develops differently, notes Pampers, Northern Illinois University, and University of California - Davis Health.
Most toddlers are ready to start toilet training at 2 to 3 years of age. Some are ready as early as 18 months old. Don't rush your child — toilet training usually goes more smoothly if you wait until you see signs that they are ready. Plan for a time when your household is calm and there's not much else going on.
A potty training delay may also indicate the presence of attention deficit hyperactivity disorder, aka ADHD. While most kids are potty-ready by 36 months, children with ADHD may struggle with potty training beyond this age.
The average age for potty training has increased over the years. According to UCL's research the average age for toilet training in the 1950's was 28 months, this had risen to 37 months in the 2000's and today there are large numbers of children who start school at 48 months still wearing nappies .
In the 1940s, most children were potty trained around the age of 1 year. In the Western world that average has since increased to the age of 3 years. This is due to the convenience of the disposable nappy, as well as the current prevailing view that we should wait 'until the child is ready.
The "10 10 10 potty training" method for puppies involves taking them out every 10 minutes, waiting 10 minutes for them to go in a designated spot (like 10 feet from the door), and repeating until successful, focusing on frequent, supervised potty breaks with immediate rewards, never punishing accidents, and using a leash and crate to manage their environment effectively. It's about building consistency and positive associations for successful elimination outside.
Potty training red flags include a lack of interest, fear of the toilet, inability to stay dry for 2+ hours, not recognizing body cues (like hiding or dancing), difficulty with clothes, resistance to using different bathrooms, severe constipation, or significant regression after starting, suggesting it's time to pause and try again later, often with a doctor's input for underlying issues.
In a Montessori Toddler Community toileting is always in full swing. The children practice getting comfortable with sitting on the potty chair/toilet, practicing dressing, and undressing independently, and learning to control their bodily functions.
Early potty training practices are especially common in parts of Asia and Africa, where caregivers observe and respond to their baby's elimination cues instead of relying solely on diapers. A method known as elimination communication (EC) is central to this approach.
“It is common in Russia to begin training our children to use the pot early on,” she said. She went on to explain that it used to be an actual pot on the floor. When the baby woke up, the baby was sat on the pot until he eliminated. Parents typically start this around six months old.
We've been through this drill with our two older children, once in the US and once in France, with one big difference: the social norms for “potty training” in the US suggests that it happen by about 3 years old, whereas in France the age is more like 2 years old.
Some children are ready at 18 months, and others are ready at three. While every child is different, about 22 percent of children are out of diapers by two and a half, and 88 percent of children are out of diapers by three and a half.
While many toddlers will be ready between 18 and 24 months, some children will be willing to potty train earlier and some might not be prepared to learn until closer to 36 to 42 months. (It may also take that long for a potty trained child to stay dry during the day and at night.)
In order to get your child potty trained that quickly, you'll essentially stay home as much as possible while keeping your child naked from the waist down for fast, easy access to the toilet when one of you notices he has to go. Think of the three-day method like a potty training boot camp.
The 3-Day Potty Training method is an intensive, "cold turkey" approach where you dedicate a long weekend to staying home, keeping your child diaper-free (bottomless or in underwear) to heighten body awareness, and focusing solely on the toilet to teach them to recognize urges and use the potty quickly, requiring immense parental commitment, patience, and preparation for accidents. It involves lots of liquids to trigger the need to go, frequent potty trips (every 15 mins), and positive reinforcement, aiming for rapid results but often needing continued practice beyond the three days.
Potty training is a milestone gifted children may reach later than expected. Although a larger body of research could shed more light on this phenomenon, anecdotal evidence is mounting. More parents of kids who seem more mature for their age share similar experiences on many online forums.
And some children aren't interested in potty training until they're closer to 3, or even 4. While it might be more convenient to have a 2-year-old who's itching to potty train, it's also very normal to have a child who wants to wait longer, or ends up going through a more gradual potty-training process.
"Little girls tend to be more advanced in physical development and in speaking too, which makes the potty-training process quicker for them. But that doesn't mean training boys will be harder and slower. What's more important is your child's personality and their readiness, not their gender. Every child is different."
The Chinese potty training method, also known as Elimination Communication (EC), involves starting very early (sometimes days after birth) by observing babies for cues and holding them over a toilet or potty while making a distinct sound (whistle or shushing) to encourage elimination on command, often using kaidangku (split-crotch pants) for convenience, aiming to reduce diaper use by getting children to "go" on cue. It's a tradition rooted in responding to a baby's needs immediately, fostering a strong connection between the sound, the action, and the toilet.
Late potty training can lead to numerous problems for children. Scientific studies show that children who do not potty train until after 3 years old are more likely to develop bladder infections, incontinence, constipation, and bedwetting.
Most kids are potty trained by 3 years old, but the process can take longer. Check in with your child's pediatrician, however, if you have concerns or if your child isn't potty trained by their fourth birthday.