Cost per diaper, pouch & ounce calculator
The number that decides whether a pack is good value — cost per diaper, per wipe, per pouch, per ounce of formula — is the one number Amazon never prints. Pack counts change between sizes and brands, so the bigger box is not automatically the cheaper one. Enter what you see on any listing and compare properly.
What are you pricing?
Diapers per day
8Newborns commonly run 10–12 a day, easing to about 5–6 by toddlerhood.
Open a listing, then type in the price you actually see and the count printed on the pack. We don't publish consumable prices — they change weekly, and a stale per-unit figure is worse than none.
Cost per diaper
| Product | Price | Diapers in the pack | Per diaper | |
|---|---|---|---|---|
| Check current price | — | |||
| Check current price | — | |||
| Check current price | — |
Cribworthy is reader-supported. Product links go to Amazon and may earn us a commission, which never changes what the calculator returns — the maths runs on the numbers you type in.
Common questions
How do you work out the cost per diaper?
Divide the pack price by the number of diapers printed on the box. A $69.85 box of 174 works out to about 40¢ a diaper; a $23.58 box of 80 is about 29¢. The calculator above does this for several packs at once and flags the cheapest, because box sizes rarely line up for easy comparison.
Are bulk diaper boxes actually cheaper per diaper?
Often, but not reliably. Pack counts differ between sizes of the same brand, and a smaller pack on promotion can beat the bulk box. Because the per-diaper figure is never printed on the listing, the only way to know is to divide price by count for each option you are actually considering.
How much do diapers cost per month?
Multiply your cost per diaper by changes per day, then by about 30.4 days. At 8 changes a day and 30¢ a diaper that is roughly $73 a month. Usage matters more than brand: newborns commonly need 10–12 changes a day and toddlers about 5–6, so the same diaper can differ by more than double across the first two years.
Why does this calculator not show prices?
Consumable prices move week to week with pack-size changes, coupons, and Subscribe & Save. A per-unit cost published here would be stale within days, so the calculator asks for the price you can see on the listing right now and does the arithmetic on that.
Pick the pack first
Cost per unit only helps once you have narrowed down what you actually want to buy. These guides cover the picks feeding this calculator: