Calculators
About the Sales Tax Calculator
The Sales Tax Calculator is a free online calculator from Toolbench. Add sales tax to a price, or back it out of a total. Enter your numbers and the answer — with the formula used — updates as you type.
- Category
- Calculators
- Price
- Free
- Account
- Not required
- Runs
- Entirely in your browser
How to use the Sales Tax Calculator
- Enter the values (mode, tax rate %).
- Read the result — it updates as you type.
- Check the breakdown rows to see exactly how it was calculated.
Worked example
| Mode | Add tax to price |
|---|---|
| Price before tax | 100 |
| Tax rate % | 8.25 |
| Total with tax | 108.25 |
| Tax | 8.25 |
| Price before tax | 100.00 |
Formula: Total = price × (1 + rate ÷ 100). To back tax out of a total: price = total ÷ (1 + rate ÷ 100).
Inputs
| Mode | Add tax to price · Price includes tax |
|---|---|
| Tax rate % | Default: 8.25 |
Privacy
Everything runs in your browser: what you type or paste is processed by JavaScript on your device, not on a server. If you are signed out, nothing is saved at all. If you sign in with Google, your inputs and settings are saved privately to your account so they sync across devices.
Frequently asked questions
Is the Sales Tax Calculator free?
Yes. Sales Tax Calculator is completely free with no sign-up, no usage limits and no watermarks.
Is my data private?
Yes. The Sales Tax Calculator processes everything in your browser. Signed out, nothing is saved; signed in, your inputs sync privately to your own account.
How does the sales tax calculation work?
Total = price × (1 + rate ÷ 100). To back tax out of a total: price = total ÷ (1 + rate ÷ 100).
Does it work on my phone?
Yes. Toolbench runs in any modern browser on desktop, tablet or phone — there is nothing to install.
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