About this Sales Tax Calculator
Sales Tax Calculator provides a straightforward estimate of tax and the total after tax from a price and percentage rate. It does not determine which rate or exemptions apply in your location.
Formula or method
Tax = price × tax rate; total = price + tax.
Example
At 8% tax, a 100 purchase has 8 tax and totals 108.
Common uses
- Estimate checkout totals before purchasing.
- Check a receipt calculation with a known tax rate.
- Compare totals across different tax-rate assumptions.
How to use this tool
- Enter the values or text requested by the calculator.
- Choose units or options when the tool provides them.
- Select the calculation button and review the result.
- Use the formula, example and notes on this page to check whether the result fits your situation.
Important note
Sales-tax rules and taxable amounts vary by jurisdiction, so enter the rate that applies to your purchase.
Estimate only: Money-related results are mathematical estimates. They are not financial, tax, legal, credit or lending advice.
Frequently asked questions
Does SmartCheu know my local tax rate?
No. You enter the rate yourself because rates and rules vary by location and purchase type.
Does it handle tax exemptions?
No. It applies the percentage you enter to the full price.