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Kirkland vs Pampers cost analysis — including the membership?

Common questionAnswered by Wermom EditorialUpdated June 11, 2026

Run the math for me. Costco membership $65/yr + Kirkland diapers vs no membership + Pampers Baby-Dry. At what diaper volume does Costco win?

A question we hear often from parents. Here is our editorial team's evidence-based answer.

Wermom Editorial answer

Wermom Editorial TeamWermom Editorial· May 17, 2026
Verified math (May 2026): Kirkland Supreme @ ~$0.20/change, Pampers Baby-Dry @ ~$0.36/change. Break-even after membership = ~410 diapers. Average baby in year 1 = 2,500-3,500 diapers. Costco wins for first-year diapers handily.
Related authority guidance: AAP diapering — HealthyChildren.org

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Answers marked "Verified · Wermom Editorial" are written by our editorial team. This is general information, not medical advice — always consult your pediatrician.