Find the Cheapest Cost Per Ounce on Amazon, Free
Dealophant calculates the true value per unit for Amazon products automatically, so you never have to do the per-ounce math yourself, and it's free to use.
What is cost-per-ounce comparison, and why doesn't Amazon show it?
Cost-per-ounce comparison means dividing a product's total price by its total weight in ounces, so you can compare a 12-ounce jar against a 40-ounce tub on equal footing. Amazon's default sort orders results by relevance or total price, not by the true value per unit, so a smaller, more expensive-per-ounce container can rank above a larger, cheaper one just because its sticker price is lower. Manufacturers also use pack-size language like "family size" or "value pack" that implies savings without guaranteeing a lower cost per ounce.
Dealophant closes that gap. It calculates true value-per-unit automatically for every listing it indexes, so the cheapest cost per ounce is always surfaced first, free, with no account required.
How Dealophant calculates true value per unit
Every search reads Amazon's results (a repeat can be up to 15 minutes old), picks one unit for the whole search, and measures each listing in that unit. Weight is stored in ounces and volume in fluid ounces. Comparable listings are sorted by price per unit, low to high, and nobody can pay to change that order. Amazon's own per-unit price is a cross-check when it is a comparable weight or volume, not the number we rank on. Full methodology is at /how-it-works.
FAQ
- Is Dealophant free?
- Yes, completely free, no account required. There's no subscription and no paywall.
- How does Dealophant find the cheapest cost per ounce?
- By reading Amazon search results, measuring each listing in one unit for the search (ounces for weight), and sorting comparable listings by price per unit, low to high.