Sales Tax Calculator
Calculate tax on any purchase
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Full guide
How to Calculate Sales Tax on a Purchase
Learn sales tax = rate × price, reverse pre-tax from total, state rate overview, and tax-free states — with clear examples and a free tool.
About Sales Tax Calculator
A sales tax calculator that computes the total tax and final price for any purchase. Enter the pre-tax price and tax rate (or select by state) to see itemized tax amounts. Includes a reference table of all 50 U.S. state sales tax rates, combined state+local averages, and tax-free states. Supports reverse sales tax calculation to find the pre-tax price from a total. Useful for car purchases, online shopping, and business invoicing. 100% client-side.
Sales Tax Calculator Features
- Tax amount calculation
- Total with tax
- Reverse tax calc
- State tax rates
- Combined local rates
- Car purchase tax
- Tax-free states
- Percentage breakdown
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