Sales Tax Calculator
Add or remove sales tax from a price, and see the tax amount.
Tax on and off a price
Sales tax is added to a price at a percentage rate, and you often need to work either direction — adding tax to a pre-tax price, or extracting the tax from a total that already includes it. This does both, showing the tax amount and the price with or without it.
Enter a price and rate to add or remove the tax.
The reverse calculation trips people
Adding tax is easy; removing it is where people slip. To find the pre-tax price from a tax-inclusive total, you cannot just subtract the percentage — you divide by one plus the rate, because the tax was calculated on the lower pre-tax figure, not the total. Getting this backwards overstates the tax and understates the base. It matters for anyone reconciling receipts, invoicing, or reporting tax. Rates also vary widely by location and sometimes by product, and some places show tax-inclusive prices while others add it at the till, so the direction you need depends on where you are and what the price represents.
Common questions
How do I remove tax from a tax-inclusive price?
Divide the total by one plus the rate — not subtract the percentage, since the tax was calculated on the lower pre-tax figure.
Why can't I just subtract the tax percentage?
Because the percentage was applied to the pre-tax price, not the total, so subtracting it from the total overstates the tax.
Is anything uploaded?
No. The calculation happens in your browser.