🛒 Unit Price Comparer
Find the best value product instantly — enter price and quantity for each item, and the tool ranks them by price per 100g, 100ml, or each.
About
Unit Price Comparer is a free, in-browser tool that helps you make smarter shopping decisions by normalizing prices across different package sizes and units. Add multiple products with their price, quantity, and unit — choose from grams (g), kilograms (kg), pounds (lb), ounces (oz), millilitres (ml), litres (l), fluid ounces (fl oz), or count (ea). The tool converts everything to a common baseline (price per 100g, price per 100ml, or price per item) and ranks all products from cheapest to most expensive, highlighting the best value in green. Everything runs locally in your browser — no data is sent anywhere.
How to use
- Click 'Add Product' to create a row for each item you want to compare.
- Enter the product name, price, and quantity for each item.
- Select the unit for each product: g, kg, lb, oz, ml, l, fl oz, or ea (each).
- The tool instantly calculates the unit price and ranks all products — the best value is highlighted in green.
- Remove any product row with the delete button to narrow down your comparison.
FAQ
- How does the tool decide which product is the best value?
- It converts every product to a common unit — price per 100g for weight items, price per 100ml for volume items, and price per item for count-based products — then sorts them lowest to highest.
- Can I mix weight and volume products in the same comparison?
- You can add them together, but the tool groups weight-based and volume-based products separately, since grams and millilitres measure different things and cannot be directly compared.
- Which currencies does the tool support?
- The tool is currency-agnostic. Just enter numbers in whatever currency you are shopping in — the comparison is always relative, so the currency symbol does not matter.
- Does the tool save my product list for next time?
- Yes. Your product entries are automatically saved in your browser's localStorage so they persist when you reload or revisit the page. No account or cloud storage needed.
- Is this tool useful for online grocery shopping?
- Absolutely. Open it alongside your online store, copy the price and pack size for each product, and instantly see which deal gives you the most for your money — no mental math required.