Sales Tax Calculator
Add sales tax to an amount, or work out the tax already included in a total.
Verify the correct rate with your local tax authority. Not tax advice.
About Sales Tax Calculator
Sales Tax Calculator either adds sales tax on top of a net amount or extracts the tax already baked into a tax-inclusive total. The first mode is for pricing and quoting; the second is for parsing a receipt where the only figure you have is the total and you want to know how much of it was tax.
Worked example, add mode: a $200 net price at 8.875% sales tax (New York City's combined state and city rate) becomes $217.75. Extract mode: a $217.75 gross at the same rate decomposes back into $200 net and $17.75 tax — and the formula matters here, because 8.875% of the gross is not the right answer (the gross already contains the tax). The correct reverse calculation is gross ÷ (1 + rate).
US sales tax is highly local: there is no federal sales tax, and every state, county, and city can add its own. Combined rates range from 0% in Delaware, Montana, New Hampshire, and Oregon to over 10% in some California and Illinois cities. The calculator does not know your location — you supply the rate, which is the most reliable approach because rates change and lookup tables go stale. Outside the US the same math works for VAT or GST; the dedicated VAT Calculator carries identical logic under a different label.
Calculations run entirely in your browser. Pricing scenarios and receipt amounts are never uploaded or logged.