Calculate pre-tax amount, tax, and final total in forward or reverse mode.
Calculate with the Sales Tax Calculator
Enter the details below. Required values are validated before results are shown.
Sales Tax Calculator results
How to use the Sales Tax Calculator
- Choose the display currency and any calculation mode or frequency.
- Enter each required value using a consistent currency and time basis.
- Select Calculate or press Enter.
- Review the result explanation, assumptions, and any schedule before relying on the estimate.
Worked example
A pre-tax amount of 100 at 8% produces 8 tax and a 108 total.
Understanding the results
The summary separates the most important output from supporting values. Currency selection changes formatting only; it does not convert exchange rates or alter a currency-independent formula.
Frequently asked questions
How do I extract tax from an inclusive price?
Reverse mode separates the tax embedded in a tax-inclusive amount. The result depends on the values and assumptions entered, so compare it with the applicable provider or official rule.
Can I use decimal values in the Sales Tax Calculator?
Yes. Decimal values are supported. Results are calculated at full JavaScript numeric precision and formatted for readability.
Are the Sales Tax Calculator results guaranteed?
No. The calculator provides an estimate based on the entered assumptions and is not financial, tax, investment, lending, payroll, or legal advice.