Tax = Pre-tax Price × Tax Rate; Inclusive Base = Total / (1 + Tax Rate)Finance calculator
Sales Tax Calculator
Add sales tax to a pre-tax price or separate tax from a tax-inclusive total.
Your figures stay on this device
Under the hood
Understand the number
Use the formula and notes below to check whether the result fits your real operating conditions.
- Tax Rate
- Combined rate verified for the transaction jurisdiction.
- Amount Type
- Whether the entered amount includes tax.
Enter a realistic current order or SKU, then compare the result with your target.
Change one variable at a time to see which operational lever matters most.
This calculator does not determine nexus, sourcing, exemptions or the correct jurisdiction. Verify the combined rate and taxability with the relevant state and local authorities.
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FAQ
Are my inputs stored?
No. Calculator inputs run in your browser and are not submitted.
When was this checked?
Last reviewed on August 26, 2026. Changing third-party fees should be verified from official sources.