Price × (1 + rate)
At 6.25%, a $100 pre-tax price becomes $106.25.
Free small-business tool
Sales Tax Calculator.
Choose a state to load its current statewide base rate, then add tax to a price or work backward from a tax-inclusive total.
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Tax inputs
Select a state and calculate.
RATE GUIDEChoose a state
Updated July 1, 2026State base—
Avg. local—
Avg. combined—
Select a state to load its statewide base rate. You can always enter an exact local rate below.
The rate remains editable because city, county, special-district, product, and service rules can change the amount that applies to a transaction.
Rate data: General sales-tax rates as of July 1, 2026. Local figures are population-weighted statewide averages, not the exact rate for a particular address.
View the 2026 source ↗This calculator performs arithmetic using the selected or manually entered rate. It does not determine nexus, taxability, sourcing, exemptions, filing obligations, or provide tax, accounting, or legal advice. Confirm the transaction's exact rate with the applicable state or local tax authority.
Sales-tax math
Add tax or reverse it from an included total.
Choose a statewide base for a quick reference, use the population-weighted average combined estimate, or type an exact verified rate.
Total ÷ (1 + rate)
At 6.25%, a $106.25 tax-inclusive total contains $100 before tax and $6.25 of tax.
Start with the state
Load a current general base rate and see a statewide average local and combined reference.
Verify the exact rate
Location, sourcing, product, service, exemptions, and nexus can all affect a real obligation.
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State-specific rates, examples, and official sources.
Common questions
Sales-tax calculator answers.
How do I calculate sales tax?
Multiply the pre-tax price by the sales-tax rate expressed as a decimal. Add that tax amount to the original price for the final total.
How do I find tax inside a total?
Divide the tax-inclusive total by one plus the rate to find the pre-tax amount, then subtract that amount from the total.
Is the statewide rate always the checkout rate?
No. Local jurisdictions, sourcing rules, the item sold, exemptions, and other rules can change the applicable rate.
Are average combined rates exact?
No. The average combined figures are population-weighted statewide estimates. Use an official address or jurisdiction lookup for a real transaction.