Unit price comparison

Compare different pack sizes and multipacks without mental arithmetic. Enter each offer’s total price, the amount in each pack and the number of packs included. The calculator converts compatible quantities and displays the price per kilogram, litre or item. The cheapest package on the shelf may have a higher cost for the same quantity.

Illustrative inputs, not current market prices. Prices are manual. Language does not select a tariff or tax regime.

Calculation saved only in this tab. Shared links contain the entered figures.

Result breakdown

Understand before deciding

How this calculation works

The reference price is the total price divided by the amount per pack, the pack count and the conversion factor. For example, 500 g at 3 costs 6 per kg; 750 g at 4.20 costs 5.60 per kg. The difference is 0.40 per kg. Grams, kilograms, ounces and pounds compare mass; millilitres, litres and fluid ounces compare volume.

What is included and excluded

Weight is not converted to volume: one litre is not necessarily one kilogram. Mass ounces, US fluid ounces and Imperial fluid ounces are distinguished. Compare equivalent products and enter the price of the complete multipack, not one pack when you have entered several. Waste, quality, transport and nutritional value are not calculated.

Practical checks before deciding

A large pack improves your budget only if you can use its contents. Check expiry dates, storage space and normal consumption before buying. To compare promotions, calculate their final prices in the discount tool and bring the totals here. Save a comparison and change the pack size to detect a unit-price increase even when the shelf price stays the same.

Read about formulas, conventions and limitations