Add or remove US sales tax using state base rates plus local tax, with discounts and quantities.
Please do not make financial decisions based on these results.
What is the Sales Tax Calculator?
The sales tax calculator adds sales tax to a price or removes it from a total. Choose your state to fill in the base rate, then add any local rate.
Everyday business math
These tools handle calculations that come up in shopping, pricing and small business. The sales tax calculator adds or removes US sales tax by state, and the VAT calculator does the same for value added tax.
How to use the Sales Tax Calculator
- Fill in the fields. You will need Price before tax ($), Quantity, Sales tax rate (%). Use real figures from your own records where you can. Fields marked optional can stay at zero.
- Choose your options. State, Mode change how the result is worked out, and the form updates to match your choice.
- Read the result. The highlighted box gives the Total (gross), and the cards below show Net amount (before tax), Sales tax amount, Total rate used. Tables and charts break it down further.
- Test other scenarios. Results update as you type. Change one value at a time to see what drives the answer, and press Reset to go back to the defaults.
Formula and how it works
Example with real numbers
Here is the Sales Tax Calculator using the default values shown in the calculator above:
Inputs
| Price before tax ($) | 100 |
|---|---|
| Quantity | 1 |
| State | Enter my own rate |
| Sales tax rate (%) | 8 |
| Mode | Add tax to the price |
Results
| Total (gross) | $108.00 |
|---|---|
| Net amount (before tax) | $100.00 |
| Sales tax amount | $8.00 |
| Total rate used | 8% |
| Price per item incl. tax | $108.00 |
With these inputs the calculator returns Total (gross): $108.00. Change any value in the calculator to see how the result moves.
What the results tell you
The results panel of the Sales Tax Calculator reports Total (gross), net amount (before tax), sales tax amount, total rate used and price per item incl. tax. Compare these figures while changing one input at a time, and use the related calculators below to look at the same situation from another angle.
Tips for better results
Method and limits. This calculator applies the formula in the section above to your inputs, in your browser; nothing you enter is stored on our servers. The result is only as accurate as the numbers you enter and the formula shown above. It is for information, not financial, tax or legal advice.
Frequently asked questions
What rate should I use?
Use your combined state, county and city rate. State base rates are filled in for you.
Which states have no sales tax?
Alaska, Delaware, Montana, New Hampshire and Oregon have no statewide sales tax, though Alaska allows local taxes.
Are the results exact?
They follow the stated formulas exactly. Real-world fees, taxes and rounding may differ slightly.
Can I use these for business?
Yes for quick estimates, but confirm official figures with your accountant.
Are the results guaranteed?
No. Results depend entirely on the numbers you enter and the formulas shown on this page. Please do not make financial decisions based on them alone; confirm important figures with a licensed professional.
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