Add or reverse sales tax
Sales Tax Calculator
Calculate sales tax from a price and rate, or find the pre-tax price inside a tax-inclusive total.
By Josh Liljenquist •
Calculated result
Enter values and select Calculate.
Add-tax formula
Tax = pre-tax price × tax rate. Total = pre-tax price + tax.
Reverse-tax formula
Pre-tax price = tax-inclusive total ÷ (1 + tax rate). Displayed currency rounds to cents; jurisdictions and sellers can apply rounding differently.
Worked example
A $100 pre-tax price at 7.5% produces $7.50 tax and a $107.50 total.
