Online Tool Store
Unit Price Comparison
Compare any number of package prices and sizes, with automatic conversion between oz, lb, kg, mL, L, and gallons to reveal the true best value.
This works right here on your device — nothing gets sent out.
Finance and shopping
Unit Price Comparison
Items to compare
Comparison
How it works
- Add each item you're comparing with its price, quantity, and unit (weight, volume, or count).
- Items are automatically grouped by category — weight items compare against other weight items, and so on.
- Within each group, every price is converted to a common base unit so different units (oz vs. kg, or L vs. gal) compare fairly.
- The lowest price per 100g, per 100ml, or per item is marked "Best value," with the rest shown as a percentage more expensive.
FAQ
Does this convert between different units automatically?
Yes — enter one item in ounces and another in kilograms (or one in liters and another in gallons) and both are converted to a common base unit before comparing, using the exact international unit definitions (16 oz = 1 lb, 128 US fl oz = 1 US gal).
How many items can I compare?
As many as you add — use "Add item" for a third, fourth, or further option, not just two.
Why are weight, volume, and count items shown in separate groups?
A price per 100g and a price per 100ml aren't comparable to each other, so items are automatically grouped by whether their unit measures weight, volume, or a count of items, and the best value is only compared within its own group.
What if two items are in the same unit already?
They're compared directly with no conversion needed — the grouping and normalization only matters when units differ within a category.
Does this account for quality, brand, or bulk discounts I plan to use later?
No — it compares the price you enter for the quantity you enter, nothing else. It won't factor in coupons, membership pricing, or whether you'll actually use a larger pack before it expires.
How we compare
| Feature | Online Tool Store | iToolVerse Grocery Price Comparator | ModernConvert Unit Price Calculator |
|---|---|---|---|
| Compare more than two items at once | Yes | Yes (unlimited) | Two items only |
| Automatic conversion between different units | Yes | Yes | Not offered — units must match manually |
| Best value highlighted automatically | Yes | Yes | Not shown |
| No sign-up | Yes | Yes | Yes |
For comparing more than two package sizes without converting units yourself first, this keeps every item's real per-unit cost lined up automatically.