Unit Price Comparison Calculator
Formula
Unit Price = Total Price ÷ Size/Weight
Unit price tells you the cost per unit of measurement (per ounce, per gram, per liter). The lower unit price is the better deal, regardless of total package price. Buying in bulk isn't always cheaper — always check the unit price.
Frequently Asked Questions
Is bigger always cheaper per unit?
Not always. Sometimes smaller sizes are on sale or the larger size has a higher per-unit cost. Always compare unit prices rather than assuming bulk is better.
What units should I use?
Use the same units for both products. Ounces (oz), grams (g), liters (L), or count — as long as both sides use the same measurement.
Does this work for non-food items?
Yes. Compare paper towels (price per sheet), laundry detergent (price per load), or any product where size varies between options.