Package sizes, multipacks, discounts, or metric and US customary labels make the cheaper option hard to identify.
Unit Price Calculator
Compare package prices by weight, volume, or item count using metric or US customary units.
Start here
Enter a currency symbol, product name, and total price.
Browser-first
Your prices and package details are calculated locally in your browser and are not uploaded to a server.
Useful for
Compare grocery package sizes
Quick examples
Best price, Total amount 24 ozProduct B 24 oz: $ 0.27 / ozCheaper than second $ 0.04 / oz
per oz, Total amount 16 ozProduct A 16 oz: $ 0.31 / oz
Quick answer
Compare packages by the same unit price
Enter each package's final price, amount, and unit to compare cost per ounce, pound, gram, kilogram, fluid ounce, liter, or item.
Unit price measures quantity for money; it does not account for quality, waste, shelf life, shipping, or taxes unless included in the entered price.
Discount Calculator: Calculate final price, amount saved, total discount percentage, coupons, optional second discounts, and shipping in your browser.
About this tool
Compare package prices by weight, volume, or item count using metric or US customary units.
Your prices and package details are calculated locally in your browser and are not uploaded to a server.
How to use it
- Enter a currency symbol, product name, and total price.
- Enter pack count and amount per pack.
- Choose compatible weight, volume, or item units.
- Compare the normalized unit prices.
Common use cases
- Compare grocery package sizes
- Check price per ounce, fluid ounce, or item
- Compare multi-pack deals
- Use discounted prices before buying
Compare the Same Unit
Unit-price comparison works best when each product is converted to the same measurement basis. A larger package, multi-pack, or sale label can look cheaper until you compare price per ounce, per fluid ounce, or per item. Metric inputs can be mixed with compatible US customary inputs.
| Package label | Suggested comparison | Good for |
|---|---|---|
| 16 oz and 24 oz packages | Price per oz | Food, coffee, powders, and dry goods |
| 12 fl oz bottle and 2 L bottle | Price per fl oz | Drinks, skincare, and cleaning liquids |
| Multi-pack | Price per item | Batteries, masks, stationery, and supplies |
Use the Final Price You Expect to Pay
If a product has a discount, coupon, or sale price, enter the final price rather than the original price. You can calculate that final price first with the discount calculator, then compare package sizes here.
FAQ
Can I compare metric and US weight units?
Yes. You can mix grams, kilograms, ounces, and pounds in one weight comparison. English results are shown per ounce.
Can I compare liters and fluid ounces?
Yes. You can mix milliliters, liters, and US fluid ounces in one volume comparison. English results are shown per fluid ounce.
Can I compare a weight product with a volume product?
No. Unit prices are only meaningful within the same measurement type, so compare weight with weight, volume with volume, or count with count.
Should I use sale prices or original prices?
Use the price you expect to pay. If an item is discounted, calculate the final price first, then enter it here.
Are my product details uploaded?
No. The comparison runs locally in your browser.