Is Amazon better than Costco for diapers in Canada?

In Canada, Costco is often the better choice for the lowest cost per diaper, especially if you buy in bulk and are comparing price per diaper rather than box price. Amazon Canada is often better for convenience, home delivery, and a wider brand selection.

Practical takeaway

• Pick Costco if your main goal is the lowest everyday unit price and you’re comfortable buying larger quantities and having a Costco membership.
• Pick Amazon if you value delivery, easy reordering, and sometimes better access to specific brands or sizes.

Best way to compare

Don’t compare box prices alone. Compare cost per diaper:

1. Find the total price.
2. Divide by the number of diapers in the pack.
3. Check whether shipping, taxes, and any membership or subscription costs change the final price.

What to verify before buying

• Current Amazon Canada Subscribe & Save diaper discounts
• Current Costco Canada pack sizes and member pricing
• Whether a specific brand you want is cheaper on one site this week

Bottom line: If you want the cheapest routine option, Costco usually wins; if you want convenience and flexibility, Amazon often wins. Exact prices can change, so it’s worth checking the current listings before buying.