Diaper Stock Calculator
Work out how many diapers you need per day, per week and per box: baby age, changes per day and box size convert into a buying plan.
About this tool
Pick your baby’s age band and the diapers per box — this calculator turns changes-per-day into weekly, monthly and box-count buying math.
New parents consistently overstock one size and run short on the next. The plan anticipates both: buy one to two months ahead, size up on schedule, and stop the closet growing faster than the baby.
FAQ
How many diapers does a newborn need?
8-12 per day in the first month, about 60-80 per week. That drops to 6-8 per day by three months.
How many boxes should I buy?
Start with two: babies change sizes every few weeks early on, and leftover stock is a common waste.
When should I size up?
When red marks appear on the waist/legs or leaks become frequent — roughly every 2-4 weeks in the first 6 months.