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Sales Tax Calculator — Add or Reverse-Calculate Tax From a Total
Enter a price and tax rate to see the tax amount and total — or work backward from a tax-included total to find the original pre-tax price, which most sales tax calculators do not offer but is exactly what you need when a receipt only shows the final number.
How to use Sales Tax Calc
- Enter the price and your local sales tax rate.
- Read the tax amount and total instantly.
- Or switch to reverse mode and enter a tax-included total instead.
- Read the recovered pre-tax price.
Frequently asked questions
- How do I find my local sales tax rate?
- Rates are set by state, county and sometimes city, so check your state revenue department's published combined rate for your specific location rather than assuming a single statewide number.
- What is reverse sales tax calculation?
- Working backward from a tax-included total to the pre-tax price — useful for bookkeeping when a receipt or invoice only shows the final charged amount.
- Does this handle compound or multiple tax rates?
- Enter a single combined rate (state + local combined) for the standard calculation; for itemized multi-rate scenarios, calculate each rate's contribution separately.
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