Unit Price Calculator
Compare products fairly by unit price. Enter the price and size of up to three items and see the cost per 100 g, per 100 ml or per item — the best value wins.
Unit prices and the best value will appear here
Unit price comparison
How to use
- Enter the price, quantity and unit for two or three products you want to compare.
- Keep all products on the same kind of unit — all weight, all volume, or all per-item.
- Click Compare Unit Prices — the cheapest per-unit price is highlighted as best value.
Frequently asked questions
What is unit price?
The price of one standard amount of a product — for example dollars per 100 g or per 100 ml. It is the only fair way to compare a small pack with a big pack, because the bigger pack is not always cheaper.
Can I compare grams with kilograms?
Yes — the calculator converts kilograms to grams automatically. It also converts litres to millilitres. Just do not mix weight with volume or with per-item prices.
Why is the bigger pack sometimes worse value?
Because brands price packs differently — a 1 kg bag can cost more per 100 g than a 500 g bag. Unit price catches exactly that.
What currency does it use?
It uses $ in the labels, but the maths is the same in any currency — just enter your prices in whatever currency you shop in.
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