Unit Price Comparison
The bigger pack is not automatically cheaper. Divide and see.
Reading your result
Fill in every field and the steps will be spelled out here.
How it is calculated
Bigger is usually cheaper per unit, but not reliably enough to assume. Promotions on small sizes and multipacks overturn it often, and shelf labels sometimes quote different bases — per 100g against per kilogram — which defeats a quick comparison.
Cheap per unit stops being cheap if it is wasted. Anything with an expiry date carries this risk, and the effective price rises by whatever fraction goes in the bin.
Units have to match. Entering one side in grams and the other in kilograms puts the answer out by a factor of a thousand — the calculator cannot see which unit you meant.
Frequently asked questions
Which unit should I use?
Any of them, provided both sides match. Mixing grams and kilograms is the one mistake that breaks the result badly.
How do I handle multipacks?
Enter the combined size — six 200ml bottles is 1200.
What about coupons?
Enter the price you will actually pay. Comparing list prices when one is discounted defeats the purpose.
A plain division. Expiry, storage, realistic consumption and delivery costs are not considered.