Comparison · 7 min read

Amazon vs Coles & Woolworths: reading the same shelf price

The hardest part of cross-retailer shopping is not finding a price — it is knowing you compared the same product. centKoala maps retailer listings to a single centKoala product name (e.g. “Full Cream Milk 2L”) and shows Coles, Woolworths, Chemist Warehouse, Priceline, and Amazon side by side on centkoala.com/deals.

Why apples-to-apples comparison matters

Supermarkets rename house brands constantly. Amazon titles include marketing fluff and bundle sizes. Without normalisation, you might compare a 2L milk at Woolworths with a 3L twin-pack on Amazon and draw the wrong conclusion.

centKoala’s matching pipeline links barcode and fuzzy matches to a master product. The public comparison table on our deals page shows up to fifteen staple items refreshed from the same catalogue that powers the mobile app.

Unit price beats headline price

• Coles and Woolworths apps show $/100g or $/L on shelf labels — use that when catalogue specials rotate.
• Amazon list price may exclude temporary Lightning Deals; our deal filter requires a measurable discount from recent list price.
• Chemist Warehouse and Priceline often run multi-buy promotions that do not appear on grocery apps — we include them in the same row when mapped.

State and catalogue timing

Australian supermarket catalogues are state-specific. NSW specials may differ from QLD in the same week. Select your state on the deals page before reading the comparison table. Amazon pricing is generally national but stock and Prime delivery speed vary by postcode.

When Amazon is not in the row

If Amazon has no mapped offer for a staple, the cell stays empty — we do not invent a price. That usually means no Prime deal passed our quality bar, or the product is not in Amazon’s grocery catalogue. Supermarket-only items (fresh meat, loose fruit) rarely appear on Amazon AU.

Using the comparison table

The cheapest retailer per row is highlighted. Tap Shop to open the retailer — Amazon links route through our affiliate exit gateway with proper disclosure. Supermarket links go directly to the retailer product page.

Try it: Open the live grocery comparison for your state, then download centKoala to match your own shopping list across stores.