🧷 Diaper Calculator: How Many Diapers & Which Size?

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Fill in the details and click Calculate to see your results.

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📘 About the Diapers

Newborns use 10–12 diapers a day, falling to about 5–6 for toddlers — roughly 6,000–7,000 diapers before potty training. Enter your baby's age to see how many you'll need a day, a month and until they're potty trained.

Add a price per diaper to see the monthly cost, and your baby's weight for the likely size in both India/UK (NB, S, M, L, XL) and US (Newborn, Size 1–7) sizing.

✏️ Worked examples

4-month-old, 6.5 kg

You enter
Age4 months
Baby's Weight (for size)6.5
Weight Unitkg
Potty Trained By30 months
You get
Diapers per day now8–10 (about 9)
Per monthabout 274 diapers
Still to go until potty trained (~30 months)about 4,606 diapers
Likely size — India / UK sizingS (3–8 kg)
Likely size — US numbered sizingSize 2 (12–18 lb)

8–10 (about 9); about 274 diapers.

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Newborn at ₹12 a diaper

You enter
Age0.3 months
Price per Diaper (optional)12
Potty Trained By30 months
You get
Diapers per day now10–12 (about 11)
Per monthabout 334 diapers
Still to go until potty trained (~30 months)about 5,761 diapers
Cost per month4,013 (at 12 each)
Cost until potty trained69,130

about 334 diapers; cost 4,013 (at 12 each).

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❓ Frequently asked questions

How many diapers does a newborn use a day?

About 10–12 — roughly 300–350 in the first month.

How many diapers will I need in the first year?

Around 2,500–3,000.

When should I go up a diaper size?

When you see leaks, red marks on the legs or tummy, or it's hard to fasten — even if your baby is within the weight range.