Unit Price Calculator
Unit Price Calculator
Compare price per unit, item, gram, ounce, pound, kg, ml, liter, gallon, pack, or serving. Add multiple products, discounts, tax, and purchase quantity to find the best value and estimate how much you can save.
Unit price = total price ÷ total quantity. For example, if a 2 kg rice bag costs $12, the unit price is $6 per kg. The lowest unit price is usually the best value when quality and freshness are similar.
Best Value Finder
| Product | Price | Discount % | Quantity | Unit | Pack count | Unit price | Value result | Action |
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Shopping value report
Your unit price comparison report will appear here.
Unit price helps compare value, but the best purchase can also depend on quality, freshness, expiry date, delivery cost, brand trust, storage space, and whether you will use the full quantity.
What is a unit price calculator?
A unit price calculator compares products by converting the price and package size into a common cost per unit. Instead of guessing which pack is cheaper, you can compare items by price per kg, gram, ounce, pound, liter, gallon, serving, pack, or item.
This is especially useful when two products have different sizes, discounts, or package counts. A smaller product may look cheaper at the shelf, but a larger pack may have a lower unit price.
Real shopping examples
Unit price formula
The basic formula is simple:
- Unit price = total price ÷ total quantity
- Discounted price = price − discount
- Price with tax = discounted price + tax or fee
- Estimated saving = higher unit price − best unit price
Example: A 5 kg bag costs $20. The unit price is $20 ÷ 5 = $4 per kg.
How to compare unit prices
- Enter each product name, price, quantity, and unit.
- Add a discount percentage if one product is on sale.
- Add tax or fee percentage if you want the final cost included.
- Select the unit you want to compare by, such as per kg or per ounce.
- Check the best value result and estimated saving before buying.
When the cheapest unit price is not always best
The lowest unit price is helpful, but it should not be the only decision. A large bulk pack may have the best unit price, but it may not be the best buy if it expires before you use it or if storage space is limited.
- Check expiration date and freshness.
- Compare product quality and reviews.
- Include delivery fees or membership costs when needed.
- Do not buy a large quantity only because the unit price is lower.
- For business stock, include storage, spoilage, and cash flow.
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FAQ
How do you calculate unit price?
Divide the total price by the total quantity. For example, $10 for 2 kg is $5 per kg.
What is price per unit?
Price per unit is the cost of one unit of a product, such as one item, one gram, one ounce, one pound, one liter, or one kilogram.
Why is unit price useful?
Unit price helps compare different package sizes, discounts, and quantities so you can find the better value.
Can this calculator compare kg and grams?
Yes. It can convert between grams and kilograms, ounces and pounds, and ml, liters, and gallons.
Can I include discounts and tax?
Yes. You can add a discount percentage for each product and a tax or fee percentage for the whole comparison.
Is the lowest unit price always the best choice?
Not always. The lowest unit price is usually the best value when quality, freshness, delivery cost, and actual usage are similar.
Does this tool store my shopping data?
No. This calculator runs in your browser and does not upload or store your product prices.
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