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Sales Tax Calculator
Add tax to a price, figure out how much tax is inside a total you already charged, or work backward to the pre-tax price.
FreeNo adsNo accountNothing uploaded
How to use it
- Enter the amount.
- Enter your sales tax rate.
- Choose add tax or take tax out, and read the result.
The math
Total with tax = price times (1 plus tax rate)
Price before tax = total divided by (1 plus tax rate)
Tax included in a total = total minus price before tax
Good to know
- Rates vary by state, county and city. Check your state’s department of revenue for the rate that applies to you.
Questions
Does this know my local rate?
No. You enter the rate. Look it up with your state department of revenue.
Is it really free?
Yes. No trial, no paid tier, no account. The Small Business Owner Network has no ads and no hidden costs.
Is my information uploaded?
No. The tool runs in your browser. What you type stays on your computer and is never sent to us.
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General information, not legal, tax or financial advice. Page last checked 2026-10-13.