Smarter shopping
Compare packages on equal terms.
Enter the price and quantity for two products. The calculator converts both to the same unit so package size cannot hide the better value.
Your comparison
Unit prices will appear here.
Enter both package prices and quantities to compare them on equal terms.
Your comparison
How unit pricing reveals value
Unit price divides the package price by its quantity. A $4.99, 32-ounce package costs about $0.156 per ounce. A $3.19, 14-ounce package costs about $0.228 per ounce, so the larger package is cheaper per ounce.
Compare like with like. Weight and liquid volume are different measurements, and a lower unit price is only useful when the product, quality, and amount you can actually use are comparable.
Reference: The NIST Unit Pricing Guide recommends consistent units so shoppers can make meaningful value comparisons.
Assumptions and limits
The calculator assumes the package quantity is accurate and that both options can be compared using the selected measurement. It does not account for quality, freshness, usable yield, waste, package deposits, coupons, loyalty pricing, or differences in product formulation.
For metric weight and volume, the display basis is 100 grams or 100 milliliters. For US customary measurements, it is one ounce or one fluid ounce. These are comparison bases, not conversions between weight and volume.
Method and reference link reviewed September 29, 2026.
Learn mode
Fair comparisons use the same basis
Try this question: Which is cheaper: $4.99 for 32 ounces or $3.19 for 14 ounces?
Think first: Do not compare package prices alone. Divide each price by its amount so both choices use the same unit.
The method: $4.99 ÷ 32 ≈ $0.156 per ounce; $3.19 ÷ 14 ≈ $0.228 per ounce.
Remember: A lower unit price only means better value when the products and usable quantities are genuinely comparable.
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