finance
Sales Tax Calculator
Add sales tax to a price, or extract the tax already included in a total.
$
%
Tax amount
$8.00
Net (before tax)
$100.00
Gross (with tax)
$108.00
How it works
- 1Pick "Add tax" or "Extract tax".
- 2Enter the amount and the tax rate.
- 3See the tax, the net (before tax), and the gross (with tax).
Use cases
- Add tax to a quoted pre-tax price.
- Find the tax already baked into a receipt total.
- Reconcile invoices that show only the gross amount.
Frequently asked questions
How does "extract tax" work?
It divides the gross amount by (1 + rate) to recover the net, then the difference is the tax. Example: $108 at 8% rate gives $100 net + $8 tax.
Does it handle compound or multiple taxes?
No — it applies a single rate. For stacked taxes, run them in sequence.
Is my data stored?
No. The calculation runs in your browser.
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