About the Sales Tax Calculator
Sales tax and VAT (Value Added Tax) rates vary by country, state, province, and sometimes even city or product category, making it genuinely useful to have a quick way to add tax to a listed price, or work backward from a tax-inclusive receipt total to find the original pre-tax price.
This calculator handles both directions: enter a pre-tax price and rate to see the total with tax added, or flip to the reverse mode to extract the pre-tax price and tax amount from a total that already includes tax — common when reconciling a receipt or invoice.
Frequently Asked Questions
What's the difference between sales tax and VAT?
Sales tax (common in the US) is typically charged once, at the final point of sale to the consumer. VAT (common in the EU, UK, and many other countries) is charged at each stage of production and distribution, though the end consumer ultimately bears the cumulative cost, similarly reflected in the final price.
Why can't I just subtract the tax rate from a tax-inclusive total?
Because the tax rate applies to the pre-tax amount, not the total — simply subtracting the percentage from the total overstates the tax removed. The correct reverse calculation divides the total by (1 + tax rate) to isolate the pre-tax price.
Do all products get taxed at the same rate?
No — many jurisdictions exempt or reduce tax rates for certain categories like groceries, prescription medication, or children's clothing, so always confirm the applicable rate for your specific product and location.