Getting started
What's the best age to start potty training?
Most children train somewhere between 2 and 3, but the healthy range is wide. Kids who start very young often take longer overall; kids who start later often learn in days. Neither is a failure.
What to do this week
- At 18 to 24 months: start only if you see clear signs, and expect it to take longer. A warm-up of potty play is never wasted.
- At 3 to 3.5: you're well within normal. Older kids respond to ownership, so let them choose underwear, rewards and when to sit.
- Not trained at all by 4, or not interested by 3.5 despite a calm try: mention it to your pediatrician, mainly to rule out constipation.
What to say
“Your body is getting ready. We'll practice together.”
Try not to say
“Your friend already uses the potty. Why can't you?”
When to call your pediatrician
- No progress at all by age 4
- Constipation, hard poops or pain when pooping
- Speech or developmental concerns you haven't discussed yet
More guides
- Getting startedSigns your toddler is ready for potty trainingRead the guide
- First daysHow many accidents are normal in the first week of potty training?Read the guide
- First days3-day potty training not working? What to do on day 3Read the guide
- Not telling meHow to get your toddler to tell you they need to goRead the guide
Last reviewed October 26, 2026. Based on public guidance from the American Academy of Pediatrics (HealthyChildren.org) and the NHS. This is general information, not medical advice. If you're worried about your child's health, talk to your pediatrician.