Kids

Diaper Calculator: How Many Diapers a Month, the Cost and the Right Size

Free tool · Updated October 3, 2026 · By CouponTalk

Your result

Enter your measurements to see your result.

Quick answer

Newborns use about 10–12 diapers a day, falling to about 6–8 by 6 months and 4–6 after the first birthday. At 7 months, about 7 a day is roughly 210 a month; at ₹12 a diaper that is about ₹2,520 a month. Size goes by weight: NB up to 5 kg, S about 3–8 kg, M 7–12 kg, L 9–14 kg, XL 12–17 kg and XXL above 15 kg (check the brand).

How to measure

Enter your baby's age in months and weight.
Enter the price you pay per diaper (pack price ÷ count).
Read the daily and monthly use, cost and size.

Diapers per day by age

Typical diaper use
Age	Diapers a day	A month
0–1 month	10–12	about 330
1–5 months	8–10	about 270
5–9 months	6–8	about 210
9–12 months	5–7	about 180
1–2 years	4–6	about 150

Typical ranges; every baby is different.

Frequently asked questions

How often should I change a diaper?

Every 2–3 hours in the day, and whenever it is soiled, to prevent rash.

Are bigger packs cheaper?

Usually yes per diaper, but buy only one pack ahead of a size change.

Cloth or disposable?

Cloth diapers cost more upfront but less over time; many parents mix both.

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