Sales Tax Calculator
Calculate tax amount and final total from any subtotal and tax rate. Useful for checkout estimates and invoices.
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Frequently Asked Questions
How is sales tax calculated?
Sales tax = subtotal × tax rate. Total = subtotal + sales tax.
Can tax rates include local taxes?
Yes. Use combined state, county, and city rates for the most accurate result.
Do all products use the same tax rate?
Not always. Some jurisdictions exempt or reduce tax on specific categories.