As of July 2026 · 45 listings tracked across Amazon, Walmart & eBay
Right now the best value is 45¢ per oz — Mama Bear Gentle Premium Baby Formula Powder 132 Oz - 4 PACK -EXP. Ja… (132 oz, $59.00) on eBay. See it on eBay →
Prices move around a lot in this aisle — double-check before you buy.
Worth knowingHeads up: the biggest pack we tracked (140.8 oz) isn't the best deal this month — it runs $1.79 per oz, while the 132 oz pick comes in at 45¢ per oz.
Median across all 45 tracked listings: $1.56 per oz. The worst deal we saw ran $3.18 per oz — same product category, 7.1× the price per unit.
The 12-month picture
This is our first month of tracked history for Baby Formula — the trend line starts here.
Lowest we've ever tracked: 45¢ per oz (July 2026).
How we figure this out
Once a month we pull live Baby Formula listings from Amazon, Walmart and eBay, read the honest quantity out of each one (ozs, in this case — the unit that actually matters), and divide the real price by it. Coupons that change what you'd pay today are applied; "subscribe & save" teasers are not. Then everything gets ranked by cost per oz, because a big box with a small number inside is still a small number.