Sales Tax Calculator
Add tax to a price or back it out of a total.
Total
$109
Pre-tax
$100
Tax
$9
Total
$109
About
Enter a pre-tax price and a tax rate to get the total. Or enter a total that already includes tax to see the pre-tax amount. Useful for receipts, expense reports, and back-of-envelope budgeting.
How to use
- Pick add tax or remove tax.
- Enter the price and tax rate.
- See the result.
FAQ
Why doesn't dividing the total by 1.tax give the right answer?+
It does. That's exactly what 'remove tax' does: total / (1 + rate). The mistake people make is subtracting the rate from the total directly, which underestimates pre-tax.