Per item
Total price ÷ item count
070 · BUSINESS & FINANCE
Unit Price Comparison Calculator
Compare price per item, weight, volume, and multi-pack unit prices on one common basis.
LOCALCALCULATE IN YOUR BROWSER
LOCALPrices and quantities are calculated only in this browser and are not sent to or stored on a server.
Compare total price and item count as price per item.
Display decimals
2
RESULT · Comparison result
B is cheaperOption A · Unit Price990/ item
Option B · Unit Price890/ item
Unit-price difference100
Savings100
Savings rate10.1%
Equal-quantity cost
A 990 / B 890 · itemFormulaunit price = total price ÷ total quantity; display = normalized × 1HOW TO USE
How to use
- 01
Choose Items, Weight, Volume, or a multi-pack mode.
- 02
Enter total price and quantity for Option A and Option B.
- 03
For weight or volume, choose the matching g/kg or mL/L input unit.
- 04
Choose a common display basis such as 100 g, 1 kg, 100 mL, or 1 L.
- 05
Review the cheaper option, unit-price difference, and savings for the same basis quantity.
- 06
For a multi-pack, enter both pack count and per-item weight or volume.
- 07
After finding the lowest unit price, confirm that quantity, quality, and shipping conditions are truly comparable.
UNIT PRICE FORMULA
Unit price comparison guide
100 g · 1 kg
Normalize to grams and multiply by 100 or 1000
100 mL · 1 L
Normalize to milliliters and multiply by 100 or 1000
Multi-pack
Count × per-item quantity gives total quantity
A/B
Winner uses unrounded internal unit price
Savings
Cost difference for the same basis quantity
IMPORTANT NOTES
Important notes
- Unit price = total price ÷ total quantity.
- Weight is normalized to grams and volume to milliliters before comparison.
- A multi-pack uses count × per-item weight/volume as its real total quantity.
- The A/B winner is determined with unrounded internal unit prices.
- A lower unit price does not automatically make a larger purchase the better real-world choice.
- Coupons, shipping, membership prices, and points are outside this calculator.
- A lower unit price can still mean higher total spending or waste if the package is much larger than needed.
FAQ
Frequently asked questions
01How is unit price calculated?+
Divide total price by total quantity.
02How are 100 g and 1 kg compared?+
Normalize the weight to grams, then display the common price per 100 g or 1 kg.
03How is a 6-pack calculated?+
Multiply pack count by per-item quantity, then divide total price by that real total quantity.
04Is a larger package always cheaper?+
No. Compare normalized unit price rather than package price.