Potty Training
From first signs of readiness to staying dry at night, navigate every step of the potty training journey with confidence — and data.
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What Age Should My Child Be Nighttime Potty Trained By?
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How Can I Nighttime Potty Train My Child?
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A recap of the data behind Emily Oster's potty training survey — when families start, how long it takes, what methods work, and how common the hard parts really are.
Where parents were in the journey
Most respondents (64%) had completed potty training, giving us a strong base of hindsight to learn from.
The later you start, the faster it goes
Median time to fully train drops from ~12 weeks for kids under 18 months to roughly 9 days (≈1.3 weeks) for 3–3.5 year olds.
Pooping in the toilet often lags behind
70% of kids learned both at the same time — but 30% had poop training delayed, with 14% delayed by more than a month. You are very much not alone.
Methods tried vs. methods that worked best
Going naked was both the most-tried and most-effective method. Immediate rewards punched above their weight; long-term rewards and activities did less.
Source: ParentData Member Survey on Potty Training (2023), ~6,000 respondents — a convenience sample drawn from ParentData newsletters and social media.
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