Finance
Sales Tax Calculator
Calculate sales tax for any purchase. Add tax to a price, or work backwards from the total to find the pre-tax amount.
Tax Amount
$8.88
Total (after tax)
$108.88
Effective Rate
8.875%
Frequently asked questions
What are typical sales tax rates?
US state sales tax rates range from 0% (Delaware, Montana, New Hampshire, Oregon) to over 10% in some cities. Many states have additional local taxes. The average combined state and local rate is about 8-9% in high-tax areas.
How do I find my local sales tax rate?
Check your state's department of revenue website. Many states let you look up rates by ZIP code. You can also use the sales tax rate tables provided by major tax software companies or e-commerce platforms like Stripe and Shopify.
When would I use the reverse tax calculation?
Use reverse calculation when you know the final price you paid (including tax) and need to determine the pre-tax price. This is useful for expense reporting, cost analysis, and understanding how much you actually paid in tax.
Does this calculate VAT or GST?
Yes — the math works the same for VAT (Europe) and GST (Australia, Canada, India, Singapore). Just enter your local VAT or GST rate instead of a US sales tax rate. The calculator handles both forward and reverse calculations.
Calculate sales tax instantly with our free sales tax calculator. Enter the price and tax rate to see the tax amount and total cost, or use reverse mode to find the pre-tax price from the final total.
Perfect for budgeting purchases, preparing expense reports, estimating tax deductions, and understanding the true cost of items after sales tax. Works for US sales tax, VAT, and GST.