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Sales Tax Calculator

Add sales tax to a price or work backwards from a tax-included total. Enter the amount, set your tax rate, and see the tax and grand total instantly.

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Written by Sam Larsson ✓
Everyday-money writer · Reviewed by Priya Nair · Updated June 2026
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$
7.25%
Price already includes tax
Total with tax
$107.25
Sales tax$7.25
Pre-tax amount$100.00
Tax rate7.25%

How to use the sales tax calculator

Results update instantly as you type. To add or remove sales tax:

1
Enter the amount — the pre-tax price — or a tax-included total if you are working backwards.
2
Set your sales tax rate — drag the slider or tap a common preset like 7.25%.
3
Pick a direction — leave the toggle off to add tax, or turn on “Price already includes tax” to remove it.
4
Read the result — see the tax, the pre-tax price, and the grand total — instantly.

How to calculate sales tax manually

Sales tax is a percentage added to the price. Convert the rate to a decimal and multiply, then add it on:

Tax = Price × (Rate ÷ 100)
Total = Price + Tax

Worked example. A $100 purchase at a 7.25% rate:

Tax — $100 × (7.25 ÷ 100)$7.25
Total — $100 + $7.25$107.25

To go the other way and pull tax out of a total, divide by (1 + rate). $107.25 ÷ 1.0725 = $100.00 before tax.

How sales tax works in the U.S.

There is no national sales tax. Rates are set locally, so what you pay depends on where the sale happens. A few things worth knowing:

State + local layers
City and county taxes stack on the state rate
Combined ~0–10%
Five states with no state sales tax
Alaska, Delaware, Montana, New Hampshire, Oregon
0% state
Tax-exempt essentials
Many states reduce or exempt groceries & medicine
Varies
Destination-based rule
Most states tax at the buyer’s location
Varies

Rates change over time and by jurisdiction — check your state or local tax authority for the exact current rate.

Sales tax table (quick reference)

Total to pay (tax included) for common amounts at three representative rates:

Amount
6%
7.25%
8.25%
$10
$10.60
$10.73
$10.83
$25
$26.50
$26.81
$27.06
$50
$53.00
$53.63
$54.13
$100
$106.00
$107.25
$108.25
$250
$265.00
$268.13
$270.63

Frequently asked questions

Multiply the price by the tax rate divided by 100 to get the tax, then add it to the price. At 7.25%, a $100 item is $100 × 0.0725 = $7.25 tax, for a $107.25 total.