Add sales tax to a price, or strip it back out of a tax-inclusive total.
How to use this calculator
Every field updates the result as you type — there is no submit step. The inputs below are pre-filled with a realistic example so you can see how the tool behaves before entering your own figures.
| Field | Unit | What it means |
|---|---|---|
| Mode | — | Select the mode that matches your situation. |
| Amount | $ | Enter a numeric value. |
| Sales tax rate | % | Enter a numeric value. |
Worked example
Using the default values loaded into the calculator above, the result is:
| Input | Value |
|---|---|
| Mode | Add tax to price |
| Amount ($) | 100 |
| Sales tax rate (%) | 8.25 |
| Output | Value |
|---|---|
| Total with tax | $108.25 |
| Net price | $100.00 |
| Sales tax | $8.25 |
| Gross total | $108.25 |
Reading the result
Financial projections compound small assumption changes into large differences over time. Rates, fees and tax treatment vary by lender and jurisdiction, so treat the output as a well-structured estimate for comparing options rather than a quotation.
Figures that change annually — tax bands, contribution limits, statutory rates — are exposed as editable inputs. Check them against current published values before relying on the result.
Sharing and saving a calculation
The "Copy link" button encodes every value you have entered into the page URL. Opening that link restores the calculation exactly, which makes it easy to bookmark a scenario, send it to someone else, or keep several variations side by side in separate tabs.
Frequently asked questions
What does the Sales Tax Calculator do?
Add sales tax to a price, or strip it back out of a tax-inclusive total.
What result do the default values produce?
With the values pre-loaded in the calculator, total with tax comes to $108.25.
Is this calculator free to use?
Yes. It is free, requires no account, and runs entirely in your browser — nothing you enter is transmitted or stored on a server.
Can I save or share a calculation?
Yes. The "Copy link" button builds a URL containing all your entered values. Anyone opening that link sees the same calculation.
How accurate is the result?
The calculation itself is exact for the inputs given. Real-world accuracy depends on how well those inputs reflect your actual situation, so review the assumptions before relying on the figure.