Unit Price Comparison Calculator
Compare different container sizes, multi-packs, and grocery deals to find which option offers the lowest true cost per unit.
Package / Option A
Package / Option B
Option B is 19.4% cheaper per ounce, saving you $0.109 per unit.
Why Unit Price Comparison Saves Money
When shopping at grocery stores or buying in bulk from retailers like Amazon or Walmart, comparing the sticker price alone is misleading. A $14 bottle of shampoo may seem expensive compared to an $8 bottle, but if it contains triple the volume, it is drastically cheaper per fluid ounce.
The Unit Price Formula
Bulk Buying Myth: Supermarkets know customers assume the largest family-size box is the cheapest. Sometimes, standard-sized boxes on sale with promotional coupons have a lower unit price than the bulk version. Always verify before putting it in your cart.