Finance
Sales Tax Calculator
Enter an amount and pick your state to calculate the sales tax and total price. The dropdown sets each state's base rate; edit the rate to add your local city or county tax.
Quick answer: Sales tax is the purchase amount times the tax rate. State base rates range from 0% (Alaska, Delaware, Montana, New Hampshire, Oregon) to 7.25% in California — and most cities add a local tax on top.
Frequently asked questions
How do you calculate sales tax?
Multiply the pre-tax amount by the sales tax rate (as a decimal), then add it back to the price. On a $100 purchase at 7.25%, the tax is $7.25 and the total is $107.25.
Which states have no sales tax?
Five states have no statewide sales tax: Alaska, Delaware, Montana, New Hampshire, and Oregon. Alaska and Montana still allow some local sales taxes.
Does this include local sales tax?
The dropdown loads each state's base rate; most cities and counties add a local sales tax on top. Edit the rate field to enter your exact combined rate.