Sales Tax Calculator
Add tax to a net price or extract it from a gross price.Math & StatisticsSales Tax Calculator
Add tax to a net price, or extract the tax out of a gross price that already includes it.
About this tool
Two directions: net prices gain tax, and gross prices reveal how much of them was tax. The tax-inclusive mode divides by one plus the rate, the correct extraction formula.
How to use the Sales Tax Calculator tool
- Enter the price and rate. Tax rate as a percentage.
- Declare the price type. net (tax to be added) or gross (tax already inside).
- Read all three. Net, tax and gross, whichever you needed.
Supported formats
Input
- Plain text or file input
Output
- Converted or analysed output
Inputs are validated before anything is processed. Invalid values and unsupported files are rejected with a clear error instead of failing silently.
Frequently asked questions
How does gross mode work?
Net equals gross divided by one plus the rate, so the tax is extracted rather than added on top.
Which rate should I use?
The combined rate that applies at the sale location.
Are rounding rules applied?
Two decimals displayed; no jurisdiction-specific rounding.
Privacy
Everything you enter stays in this browser tab. There is no upload endpoint for tool inputs, no account, and no server-side copy of your text or files. Results are produced locally and disappear when you close the page.
No account is required and no file is ever uploaded. See the privacy policy for details about analytics and the limited data this site stores.
Known limitations
- Single rate only; no regional tax tables.
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