Sales Tax Calculator
Calculate sales tax quickly. Enter a price and your tax rate to add tax and get the final total, or work backwards from a tax-inclusive total to find the pre-tax price and the tax amount.
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How to use the Sales Tax Calculator
- 1Enter the price (before or after tax, depending on the mode).
- 2Enter your local sales tax rate as a percentage.
- 3Choose whether to add tax to the price or extract tax from a total.
- 4Read the tax amount and the final or pre-tax price.
Adding and removing sales tax
To add sales tax, multiply the price by the rate and add it on: total = price × (1 + rate/100). To find the tax already inside a total, divide rather than subtract: pre-tax = total ÷ (1 + rate/100). For example, a $107.50 total at 7.5% tax has a pre-tax price of $100, not $99.44.
Sales tax rates vary widely by location — in the United States they combine state, county and city rates, so two towns a few miles apart can charge different totals. Always use the rate for the point of sale.
Frequently Asked Questions
▸How do I calculate reverse sales tax?
Divide the tax-inclusive total by (1 + rate/100). The difference between the total and that result is the tax portion.
▸Is sales tax the same everywhere?
No. In the US it varies by state and locality and stacks; many other countries use a single nationwide VAT or GST instead.