Sales Tax Calculator

1. Add Tax mode. Enter the pre-tax price, select your state from the dropdown (state rates are pre-loaded), and add any local or city tax rate if you know it. The calculator shows the tax amount and the total with tax included.
2. Remove Tax mode. Enter a total price that already includes sales tax to work backward. The calculator shows the original pre-tax price and the exact tax amount. Useful for expense reports or verifying a receipt.
3. Local tax rates. Most states allow cities, counties, and special districts to add their own sales tax on top of the state base rate. Local rates typically add 1-3%. For example, California's state rate is 7.25%, but combined state and local rates in many California cities reach 10-10.75%.

Five states have no statewide sales tax: Alaska, Delaware, Montana, New Hampshire, and Oregon. Alaska and Montana allow local jurisdictions to add their own rates.

Sales tax is calculated as a percentage of the taxable sale price. The formulas:

Tax Amount = Pre-Tax Price × (Tax Rate / 100)
Total Price = Pre-Tax Price × (1 + Tax Rate / 100)
Pre-Tax Price = Total Price / (1 + Tax Rate / 100)

US states by combined state and average local sales tax rate (Tax Foundation, 2024):