🛒 Shopping · Free

Which one is
actually cheaper?

The bigger pack isn't always the better deal. Enter the price and size of each product — get the real price per unit and the true winner in a second.

▶︎ How to use — watch it work on real numbers

How the unit price calculator works

Supermarkets love confusing pack sizes: 900 g here, 1.2 kg there, a “family size” that costs more per gram than the small one. The only fair way to compare is the price per unit — per kilogram, per litre or per piece. This tool does the math instantly: type in the price and the size of each option, and it converts everything to the same unit and shows you the real cheapest one, plus how much you save.

When to use it

Groceries, cosmetics, pet food, cleaning supplies, coffee, supplements — anywhere the same product comes in different sizes or brands. Great for weekly shopping, bulk buying and price-per-serving comparisons.

How do I compare which product is cheaper by weight?＋
Enter each product's price and its size (e.g. 900 g or 1.2 kg). The calculator converts everything to price per kilogram and highlights the lowest — the true best value, regardless of pack size.
Does it work for litres and pieces too?＋
Yes. Switch between Weight, Volume and Count at the top to compare price per litre or price per piece.
Is my data sent anywhere?＋
No. Everything runs entirely in your browser — nothing is uploaded or stored.