Sales Tax Calculator
Add sales tax to any amount in seconds. Enter the price and your combined local rate to get the tax and the total you’ll pay.
Total with tax
$108.25
Sales tax
$8.25
Pre-tax amount
$100.00
Rates vary by state, county, and city. Enter your combined local rate for an accurate total.
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How to Use This Calculator
Enter the pre-tax amount.
Enter your combined local sales-tax rate.
We calculate the tax and the total with tax.
Adjust the rate for different locations.
Frequently Asked Questions
How do you calculate sales tax?
Multiply the pre-tax amount by the tax rate (as a decimal): amount × (rate ÷ 100). Add that to the original amount for the total. A $100 item at 8.25% adds $8.25 in tax for a $108.25 total.
What sales tax rate should I use?
Use your combined rate — state plus any county and city taxes. Rates range from 0% (a few states) to over 10% in some cities. Check your local rate for accuracy.
Is sales tax the same in every state?
No. Five states have no statewide sales tax (Alaska, Delaware, Montana, New Hampshire, Oregon), while others combine state, county, and city rates that vary by address.
How do I remove sales tax from a total?
Divide the total by (1 + rate). A $108.25 total at 8.25% means the pre-tax price was $108.25 ÷ 1.0825 = $100.
Does this calculator file or remit tax?
No — it’s an estimate to show what tax to add. Businesses must register, collect, and remit sales tax per their state’s rules.
Why Use This Calculator
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Get the total price with sales tax instantly
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See the exact tax amount
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Works for any state, county, or city rate
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No sign-up — just enter and go
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