How does the sales tax calculator work?

Enter an amount and either a tax percentage or select a US state. The calculator instantly shows the tax amount, total including tax, and a breakdown. You can also add a fixed tax amount or calculate backwards from a total to find the pre-tax price.

What's the difference between pre-tax and post-tax calculation?

Pre-tax calculation starts with the base price and adds tax to get the total. Post-tax calculation starts with a total amount (including tax) and works backward to find the original pre-tax price and the tax amount included.

Which US states have no sales tax?

Five US states have no statewide sales tax: Alaska, Delaware, Montana, New Hampshire, and Oregon. However, some of these states allow local jurisdictions to impose sales taxes. The calculator includes accurate rates for all states.

How accurate are the state sales tax rates?

The calculator uses the current state-level sales tax rates. Note that many states allow counties and cities to add additional local taxes, so the actual rate may be higher. For precise rates, consult your local tax authority.

Can I calculate tax on multiple items?

Simply enter the total amount of all items as the price. For itemized calculations with different tax rates, you would need to calculate each item separately and add them together.

How do I save my tax calculations?

Click the 'Save Calculation' button to store your current calculation in history. You can view all saved calculations, clear individual entries, or export the entire history as a CSV file for record-keeping.

What is the formula for calculating sales tax?

Tax amount = Price × (Tax rate ÷ 100). Total amount = Price + Tax amount. For reverse calculation (post-tax): Price = Total ÷ (1 + Tax rate ÷ 100). The calculator handles all these formulas automatically.

Is the Sales Tax Calculator free to use?

Yes, the Sales Tax Calculator on Easy Tools HQ is completely free and works directly in your browser with no registration required. All calculations are done locally.

Sales Tax Calculator

Calculate sales tax for all US states. Add or remove tax, view history, and export to CSV.

Whether you're a business owner calculating sales tax for customers, a shopper figuring out the final price, or just curious about tax rates across the US, our Sales Tax Calculator makes it simple. Select any US state, enter your price, and get an instant breakdown of the tax amount and total — with pre-tax and post-tax calculations, history tracking, and CSV export.

How to Use the Sales Tax Calculator

Our Sales Tax Calculator makes it easy to calculate taxes for any US state. Here's how to use it:

Select a state – Choose a US state from the dropdown or search for it. The state's average sales tax rate will be automatically applied.
Enter your price – Input the amount you want to calculate tax for.
Choose tax method – Calculate by percentage (using the state rate or custom) or by entering a fixed tax amount.
Select calculation mode – Use "Pre-Tax Price" to add tax to a base price, or "Post-Tax Price" to find the base price from a total that includes tax.
View results – See the tax amount, total price, and a visual breakdown chart.
Save calculations – Click "Save to History" to keep a record of your tax calculations.
Export history – Download your saved calculations as a CSV file.

All US States

50 states + DC rates

Pre & Post Tax

Calculate both ways

Visual Breakdown

See tax vs base price

Export History

CSV file export

Tax Details

Select State

Price

$ 100.00

Tax Method

Tax Percentage

7.25% ($ 7.25)

Calculation Mode

Tax Amount $ 7.25

Tax Rate 7.25%

Total Price $ 107.25

Tax Breakdown

Total (with tax)

$ 107.25

Tax: $7.25 (7.25%)

Base Price $ 100.00

Sales Tax $ 7.25

                            Total
                            $ 107.25
                        

Base Price

$ 100

Tax

$ 7.25

Tax History

Date/Time	State	Base Price	Tax Rate	Tax Amount	Total	Mode	Action

Sales Tax Disclaimer

The Sales Tax Calculator provided by Easy Tools HQ is for general informational and estimation purposes only. All calculations are based on the inputs provided and standard tax calculation formulas.

NOT TAX ADVICE: The results shown are estimates only and do not constitute official tax advice. Sales tax rates vary by state, county, city, and special districts. This tool should not be used for tax filing, remittance, or regulatory compliance without verification.

State rate limitations:

Combined rates are averages – State rates shown are average combined state + local rates and may not reflect your exact location
Local variations – County, city, and special district taxes can significantly change the actual rate
Rate changes – Tax rates change frequently; these rates may not be current
Product exemptions – Some items (groceries, clothing, medicine) may be exempt or have reduced rates
Nexus considerations – Online sellers may have different tax obligations based on economic nexus laws

Calculation modes: Pre-tax and post-tax calculations are mathematically accurate but may not reflect how taxes are actually applied in all jurisdictions. Some states calculate tax differently (e.g., rounding rules, bracket systems).

For accurate tax determination: Always consult your state's Department of Revenue, a qualified tax professional, or use official tax rate tables for your specific location. Businesses should verify rates before charging customers or filing returns.

No liability: Easy Tools HQ is not responsible for any tax underpayment, overpayment, penalties, or other consequences resulting from the use of this calculator. Taxpayers are solely responsible for remitting correct amounts to tax authorities.

Last Updated: March 2026

Average rates • Verify locally • Not tax advice