Sales Tax Calculator
Add or remove a sales tax rate from a purchase amount.
About the Sales Tax Calculator
Sales tax can turn a listed price into a different checkout total. This calculator lets you enter a purchase amount and a combined tax rate to estimate the tax and final price.
How to use this calculator
- Enter the purchase price before sales tax.
- Enter the combined sales tax rate you want to use.
- Review the calculated sales tax.
- Check the final price including tax.
How the calculation works
Sales tax is calculated by multiplying the purchase amount by the tax rate divided by 100. The tax is then added to the purchase amount to get the estimated total.
Example
At an 8.25% tax rate, a $100 purchase has $8.25 in sales tax and an estimated total of $108.25.
Things to keep in mind
- US sales tax varies by state, county, city, and sometimes special districts.
- Use the combined rate that applies to the purchase location.
- Some products and services can be exempt or taxed differently.
- The calculator does not automatically look up your local tax rate.
Frequently asked questions
How do I calculate sales tax?
Multiply the purchase price by the sales tax rate as a decimal, then add the tax to the purchase price.
Does this calculator know my local tax rate?
No. Enter the combined rate you want to use because rates vary by jurisdiction.
Why can sales tax differ between two nearby locations?
Local jurisdictions can add their own taxes on top of state or other applicable rates.
Can I use this before shopping?
Yes. Enter the advertised price and a local tax rate to estimate the amount you may pay at checkout.