Unit Price Comparison
Compare two products by price per unit and see which is cheaper
Unit Price Comparison: Which One Is Actually Cheaper?
Compare two products by their real price per kilogram, litre or piece — not the sticker price.
The bigger pack isn't always the better deal, and a lower price tag can hide a smaller quantity. This tool cuts through it by calculating the true unit price — the cost per kilogram, per litre or per piece — for two products and telling you which one is cheaper and by how much. Just type each product's price and amount, pick the unit, and compare. It's perfect for the supermarket aisle when you're weighing a 500 g jar against a 1.5 kg one, or two bottles in different sizes. Everything runs in your browser instantly, with no sign-up, and nothing you type ever leaves your device.
Features
Real Cost
See the true price per kg, litre or piece — not the label price.
Any Sizes
Compare a 500 g pack against a 1.5 kg one with different units.
Clear Winner
The cheaper product is highlighted with the exact percentage saved.
Private
Runs entirely in your browser — nothing is uploaded.
How to Use
Steps
- Choose the unit type: weight, volume or count
- Enter Product A's price and amount, then its unit
- Do the same for Product B
- Read which is cheaper and the % you save
Tips
- Mixed units are fine — e.g. 500 g vs 1.5 kg
- Use the same currency for both products
- For count items, compare price per single piece
- The lowest price per unit is the better value
Frequently Asked Questions
How is unit price calculated?
Unit price is the total price divided by the amount converted to a base unit (kilogram, litre or piece). For example, €3 for 750 g is €4 per kg. Comparing unit prices tells you which product is genuinely cheaper regardless of pack size.
Can I compare different pack sizes?
Yes — that's the whole point. Enter each product's own amount and unit (say 500 g and 1.5 kg) and the tool converts both to the same base unit so the comparison is fair.
Do I need to enter a currency?
No. The tool works with plain numbers, so just use the same currency for both products. The result shows the price per unit and which product wins.
Does a bigger pack always cost less per unit?
Not always. Larger packs are often cheaper per unit, but not reliably — promotions, brands and pack sizes can flip it. That's exactly why comparing the unit price is worth the few seconds.
What does the percentage mean?
It's how much cheaper the winning product is per unit compared with the other. A result of 20% means the cheaper option costs 20% less for the same amount.
Is it free?
Yes, completely free and with no account. It works entirely in your browser and doesn't store or send any data.