Compare Price Calculator
Use this free price comparison calculator to compare the true total cost of up to 3 buying options including product price, tax, shipping, and discounts. Find the cheapest option with a full breakdown.
Enter Values
Product price for option 1
Sales tax amount for option 1
Shipping cost (0 for free shipping)
Any coupon or discount amount
Product price for option 2
Sales tax amount for option 2
Shipping cost for option 2
Any coupon or discount for option 2
Leave at 0 to compare only 2 options
Tax for option 3
Shipping for option 3
Discount for option 3
Result
Enter values above and click Calculate to see your result.
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Formula
For each option, add the product price, tax amount, and shipping fee, then subtract any discount. Compare the totals to find the cheapest option. The calculator highlights the best deal.
Worked Example
Why Product Price Alone Is Misleading
- Free shipping can make a higher-priced item cheaper overall
- Out-of-state purchases may have lower or no sales tax, offsetting a higher product price
- A coupon code on a more expensive product can make it cheaper than a sale item
- Always compare the total paid at checkout, not just the sticker price
Use this calculator whenever you are deciding between different sellers, stores, or platforms for the same product.
You can also calculate changes using our Unit Price Calculator, Final Price Calculator or Tax and Discount Calculator.
Frequently Asked Questions
Should I include shipping and tax?
Yes, always. Shipping and tax can significantly change which option is cheapest. A $45 product with $8 shipping is more expensive than a $50 product with free shipping.
Can I compare only two options?
Yes. Leave option 3 fields at 0 and the calculator will compare only the first two options.
How do I find the tax for each option?
Check the seller's checkout page or estimate: multiply the product price by your local tax rate. For example, $50 at 8% tax = $4.
Should I factor in return shipping costs?
If there is a chance you might return the item, consider adding estimated return shipping to options with paid returns. Free-return options become more valuable for uncertain purchases.
AI Assistant
Ask about this calculator
I can help you understand the compare price calculator formula, interpret your results, and answer follow-up questions.
Try asking
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