Unit Price Calculator
Quickly spot the better bargain when package sizes differ. Perfect for grocery runs, warehouse clubs, or vendor quotes.
Optional: include tax for a true out-the-door comparison.
Best Value
Winner
Option B
$0.2994 per oz
$4.79 total (16 oz)
Savings vs others
- Option A: +$0.0331 per oz
Context
Based on 2 options with 0% tax applied.
Detailed Comparison
| Option | Quantity | Price (with tax) | Unit Price | Diff vs Best |
|---|---|---|---|---|
| Option B | 16 oz | $4.79 | $0.2994 | - |
| Option A | 12 oz | $3.99 | $0.3325 | +$0.0331/unit |
How to Use This Calculator
Enter each option
Provide the quantity and price for every package or quote you want to compare.
Set the unit label and tax
Adjust the units and optionally include sales tax for the final cost.
Review the winner
The table shows cost per unit for each option so you can choose the best value instantly.
Formula
Unit Price = (Price × (1 + Tax Rate)) ÷ Quantity
Example: $4.79 + 7% tax = $5.13 ÷ 16 oz → $0.321 per oz. Compare: 12 oz for $3.99 with tax = $4.27 ÷ 12 = $0.356/oz → Option B saves $0.035/oz.
Frequently Asked Questions
What if the packages use different units?
Convert them to a common unit first (for example, pounds to ounces). Enter the converted quantity for accurate results.
Should I include sales tax?
Include sales tax if it differs between stores or if you want the final price you will actually pay.
How many options can I compare?
Add as many options as you need. The calculator highlights the cheapest cost per unit automatically.
Can I use this for services?
Yes. Enter hours or deliverables as the “quantity” to compare hourly rates or per-project costs.