You'll buy roughly 6,000 of these before potty training. The per-diaper price is the number that matters — here's the ten-second way to get it.
Prices move constantly, especially with subscribe-and-save toggles. YMMV.
Pre-filled with a real-world shape: the big box wins here — but only by 3¢ a diaper, and a sale on the smaller box flips it. That's why you check every time.
PriceXray searches Amazon and sorts by cost per count automatically, coupons included — add Walmart, eBay and Google Shopping to the same search with one tap.
Compare diaper prices per count → Compare baby wipes per count →
1. Bigger box ≠ always cheaper. It's the way to bet, but sales and subscription pricing regularly make the mid-size box the actual winner. The math takes ten seconds; the assumption costs real money over 6,000 diapers.
2. Cost per diaper rises with size. The same brand can run ~20¢ at size 1 and 40¢+ at size 6, because bigger diapers mean fewer per box. When your kid sizes up, re-run the comparison — the cheapest brand at size 2 isn't automatically the cheapest at size 5.
3. Don't overbuy a size. The one genuine caution against bulk: babies outgrow sizes on their own schedule. A stack of size-3 boxes your kid graduated past is the most expensive kind of savings.
We track diaper and wipes prices monthly across retailers — current leaderboard, best value, and whether the big box is actually winning this month:
Amazon doesn't allow affiliate sites to run price alerts, so we chose the alerts. If eBay or Walmart links ever earn us a commission, they'll be labeled (paid link) — and it never changes the price you pay. The whole thing runs on Ko-fi tips.
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