Unit Price / Best Buy Calculator
Compare products by price per unit to find the best buy. Enter each option's price, quantity, and unit; the calculator converts everything to a common base (grams, millilitres, metres, or each) within a unit family and highlights the cheapest. Handles mass, volume, length, and count — mix kilograms with pounds, litres with fluid ounces, dozens with singles. Runs entirely in your browser.
| Product | Price | Qty | Unit | Price / unit |
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Price per unit = price ÷ (quantity × unit factor), where the factor converts each unit to a family base (mass→g, volume→ml, length→m, count→each). Only products in the same unit family are compared — you can't rank a kilogram of flour against a litre of milk. Units: mass g, kg, oz, lb · volume ml, l, fl oz, cup, pint, gallons · length mm, cm, m, in, ft, yd · count each, dozen, pack. Runs locally.