Calculate US sales tax in seconds, with Canadian tax formulas included for cross-border work. Enter a subtotal or reverse-calculate from a total.
This formula has no tax components.
Select your state from the formula list, enter the subtotal, and the calculator shows the exact tax amount and grand total. Rates vary by state from 0% (Alaska, Delaware, Montana, New Hampshire, Oregon) to over 9%.
Five US states have no statewide sales tax: Alaska, Delaware, Montana, New Hampshire, and Oregon. Enter a subtotal with one of these formulas and the tax amount will be $0.00.
In Quebec, you pay both GST (5%) and QST (9.975%). Use the calculator above and select the Quebec QST formula — it will calculate both taxes on your subtotal and show the full breakdown.
Reverse calculation finds the pre-tax subtotal when you only know the total amount paid. Switch to "Total → Subtotal" mode, enter the grand total, and the calculator will extract the subtotal and tax breakdown.