Looking for a sales tax calculator before and after tax price? This free tool gives you add tax to a price or remove tax from a total, both ways. Just enter your numbers and press Calculate — results are instant.
Sales tax is a percentage added on top of a price: multiply the price by the rate and add it on. The calculator also works backwards — if a price already includes tax, it divides the total by one plus the rate to find the price before tax, and the difference is the tax hidden inside. Enter the tax rate that applies where you buy; rates differ by state, county and city, so the calculator uses the rate you give it, not a fixed one.
Example: Amount $100 · Sales tax rate 8.25% · Amount is before tax
After Tax Total: $108.25
Tax is set by state, county and city, so the same item can be taxed differently in different places. This calculator uses the rate you enter, so put in the rate that applies where you are buying.
Usually yes — tax is charged on the price you actually pay after discounts, not on the original price.
For reading a receipt: if you only know the total you paid including tax, reverse mode works out the price before tax and how much of the total was tax.