Sales Tax Calculator
Calculate US-style sales tax on any purchase amount. Enter the pre-tax subtotal, pick the applicable state or local rate, and see the tax and grand total instantly. Inclusive mode extracts the sales tax already embedded in a final price.
How to use
- 1
Enter the amount
Type the purchase subtotal (typically the pre-tax price) or the receipt total, depending on the mode you pick next.
- 2
Pick the sales-tax rate
Use a quick preset (4%, 6%, 7%, 8.25%, 8.875%, 10%) or type your exact combined state + local rate. The default is 7%.
- 3
Choose the mode
“Add sales tax to net” adds the tax to the subtotal. “Remove sales tax from gross” extracts the tax already baked into a final price.
- 4
Copy the breakdown
The subtotal, sales tax and grand total update live. Copy puts the full summary on your clipboard.
Common use cases
- Estimate the all-in price of an online order before checking out.
- Reconcile the sales tax shown on a store receipt against your books.
- Back-calculate the pre-tax subtotal from a final price for expense reporting.
- Compare combined state + local rates between two jurisdictions.
Limitations
- This calculator produces an estimate only and is not professional financial, tax or investment advice. Always confirm the underlying formulae with your accountant, bank or financial advisor before making decisions.
- Rates vary by country, region and product category — always confirm the applicable Sales Tax rate for your jurisdiction.
- The calculator applies a single rate to the full amount. It does not model tiered, exempt or zero-rated supplies.
- Negative inputs are treated as zero to keep the result meaningful.
Frequently asked questions
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