The Unit Price Calculator tells you which product is actually the better deal by reducing each one to its price per unit — per kilogram, per litre, or per item. Enter the price and pack size of each option, and it ranks them from cheapest to most expensive and shows how much the best value saves.
You can mix units freely: compare a 500 g pack against a 1 kg pack, or 750 ml against 2 L, and it normalises everything to the same unit. It is the quick check for grocery shopping, where the bigger pack is not always cheaper. Everything runs in your browser.
How to use the unit price calculator
- Choose what you are measuring: weight, volume, or quantity.
- Enter the price and pack size of the first product, and pick its unit.
- Add the other products you want to compare.
- Read the ranking — the cheapest price per unit is marked as the best value.
How to compare unit prices
The unit price is simply the total price divided by the quantity: price ÷ size. To compare fairly, both items must be in the same unit, so this tool converts everything to a common base (grams, millilitres, or single items) before dividing, then shows the result per kilogram, per litre, or per item.
Worked example: a 500 g pack at ₹100 is ₹200 per kg, while a 1 kg pack at ₹180 is ₹180 per kg — so the larger pack is 10% cheaper per kilogram, even though it costs more at the till.
Comparing two packs of different sizes.
| Pack | Price | Price per kg |
|---|---|---|
| 500 g | ₹100 | ₹200 |
| 1 kg | ₹180 | ₹180 (best) |
Why the bigger pack is not always cheaper
- Retailers sometimes price larger packs higher per unit, betting shoppers assume “bigger = better value”.
- Multi-buy and “family size” deals can cost more per unit than the regular size — always check.
- Unit price makes promotions comparable: a “20% extra free” pack versus a straight discount.
- For things you will not finish, the cheaper unit price is a false economy if it goes to waste.
Frequently Asked Questions
How do you calculate unit price?
Divide the total price by the quantity. A 2-litre bottle at ₹90 is ₹90 ÷ 2 = ₹45 per litre. This tool does it for you and converts mixed units so you can compare directly.
How do I compare prices with different units, like grams and kilograms?
Convert both to the same unit first. This calculator does it automatically — enter one pack in grams and another in kilograms, and it ranks them by the same price per kilogram.
Is a bigger pack always cheaper per unit?
No. Larger or “family” packs sometimes cost more per unit than the standard size. Checking the unit price is the only reliable way to know which is the better deal.
What is unit price useful for?
Grocery and household shopping mostly — comparing different brands, pack sizes, and promotions on the same product to find the genuinely cheapest option per kilogram, litre, or item.