Price Comparison Calculator (Unit Price)
Compare products of different sizes by their unit price. Enter the price and size or quantity for each option and instantly see which is the best value per unit — the bigger pack is not always cheaper.
e.g. g, kg, ml, L, oz, or item.
Result
- Option BBest
- $0.008 / g
- Option A
- $0.009 / g
Option B is the best value at $0.008 per g. The largest pack is not always the cheapest per unit — always check the unit price before assuming bigger means better.
How to save
Bigger is not always cheaper
Retailers count on the assumption that the large size wins. Checking the unit price regularly reveals mid-size packs that beat the "value" size.
Match your units
Compare like with like — grams with grams, or count with count. Keep the unit consistent across every option so the per-unit figures are truly comparable.
Factor in what you will actually use
The best unit price is no bargain if the product expires or goes stale before you finish it. Weigh unit price against realistic usage.
Frequently Asked Questions
- What is unit price and why does it matter?
- Unit price is the cost per single unit of measure — per gram, per ounce, per item. It lets you compare products of different pack sizes fairly, which the shelf price alone cannot.
- How is the best value determined?
- Each option’s price is divided by its size or quantity to get a price per unit. The option with the lowest price per unit is flagged as the best value.
- Can I compare more than two products?
- Yes. Add several options and the calculator ranks them all by unit price, highlighting the cheapest per unit.
This calculator is provided for general information only and does not constitute financial advice. Results are estimates based on the values you enter. Selecting a country changes currency formatting only — no exchange rates or live prices are applied.