Calculator Inputs
$
8.25
Results
$108.25
Total with Tax
$8.25
Tax Amount
$100.00
Pre-Tax Amount
8.25%
Tax Rate
About This Calculator
Reverse Sales Tax Calculation
The reverse calculation is useful when you know the total (including tax) and need to find the pre-tax amount. The formula: Pre-tax = Total / (1 + tax_rate). For example, $108.25 total with 8.25% tax = $108.25 / 1.0825 = $100.00 before tax.
US State Tax Rate Examples
- California: 7.25% state + local = 8.82% average
- New York: 4% state + local = 8.52% average
- Texas: 6.25% state + local = 8.20% average
- Oregon/Delaware/Montana/New Hampshire: 0% (no sales tax)
Frequently Asked Questions
How do I calculate tax from a total?
For a total of $100.00 with 8.25% tax: Pre-Tax = $$100.00 / 1.0825 = $92.38. Tax = $7.62. Always verify by adding tax back to the pre-tax amount.
Which states have the highest sales tax?
Louisiana (9.55% combined average), Tennessee (9.55%), Arkansas (9.44%), Washington (9.40%), and Alabama (9.24%). The lowest non-zero rates are in Hawaii (4.44%), Wyoming (5.36%), and Wisconsin (5.43%).