FINANCE · FREE TOOL
Sales tax calculator
Add a user-entered sales-tax rate or separate tax from an inclusive total.
Your inputs
Enter your values, then calculate.
Decimal-point numbers; displayed rounding does not change internal values. Calculations stay on this device.
YOUR RESULT
Make the numbers clear.
Save calculation JSON ↓Calculation breakdown
Scroll sideways to see every column. You can also focus the table and use the arrow keys.
How this calculation works
Tax-exclusive: tax=base×rate. Tax-inclusive: base=total÷(1+rate). Rates and taxable items differ by jurisdiction; this tool does not look them up or apply exemptions. Display rounding may differ from invoice line rounding.
Check the assumptions
Use one currency consistently; financial outputs use that same currency, except the U.S. tax tool specifically uses USD. Financial models use your assumptions, not live rates or personalized financial advice. Check the result against your contract or the applicable tax rules.