Diaper Calculator
Estimate how many diapers your baby may need each day, week, month, and year. Add pack size and price to calculate the number of packs and your expected diaper budget.
Enter baby and diaper details
Estimated needs
Enter your details, then click Calculate Diaper Needs.
Estimated diapers per month
Per day
Per week
Per year
Packs per month
Monthly cost
Yearly cost
Typical diaper use by age
| Age | Typical use/day | Common size |
|---|---|---|
| 0–1 month | 8–12 | Newborn / Size 1 |
| 1–3 months | 8–10 | Size 1–2 |
| 3–6 months | 7–9 | Size 2–3 |
| 6–12 months | 6–8 | Size 3–4 |
| 12–24 months | 5–7 | Size 4–5 |
| 24–36 months | 4–6 | Size 5–6 |
Planning note
Every baby is different. Feeding, sleep, illness, growth, and toilet-training progress can change diaper use. Avoid buying too many newborn-size packs because babies may outgrow them quickly.
Frequently asked questions
How many diapers does a newborn use?
Many newborns use about 8 to 12 diapers per day, although actual use varies.
How is the monthly estimate calculated?
The calculator multiplies daily use by 30.44 days and then adds your selected extra allowance.
Should I stockpile diapers?
A small reserve is useful, but avoid buying too many of one size because your baby may outgrow it.
General Calculation Disclaimer
Results are estimates generated locally in your browser using standard formulas and general assumptions. They are for informational purposes only and may not reflect your specific circumstances. VisionVix accepts no liability for decisions based on this tool's output.
