PAY, TAX, DEBT, AND HOUSEHOLD PLANNING
Sales Tax Calculator
Add sales tax to a price or work backward from a tax-included total to estimate the pre-tax amount and tax.
Review your result
Your result
Ready when you are.
Enter your values and select Calculate. Your result stays on this device.
How it works
Tax = pre-tax price × tax rate. Tax-included price = pre-tax price × (1 + tax rate).
Assumptions
Uses the rate you enter. U.S. sales tax can vary by state, county, city, product, and exemption.
Use case
sales tax calculator: a clear planning check
Add sales tax to a price or work backward from a tax-included total to estimate the pre-tax amount and tax. The stated formula, assumptions, and result limits remain visible so the calculation can be checked in context.
Use a clear sales tax calculator scenario with values you can verify before relying on the result.
Method and update
Last reviewed: 2026-08-08. This tool performs the stated formula locally in your browser using the values you enter.
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