Sales Tax Calculator
Add US sales tax to any price, or find the original pre-tax price from a tax-inclusive total. Choose a state preset, pick a quick rate, or enter your local rate. Results appear instantly — your numbers never leave your browser.
What do you want to calculate?
Enter the price before tax — we calculate the sales tax amount and the total you pay.
US state preset (combined average rate)
Sales tax rate
Enter a price and rate above to see results.
Disclaimer: Results are estimates only. State preset rates are combined weighted averages (state + local) as of 2025/2026 and may not reflect your exact location. Actual rates vary by city, county, and product type. Verify the current rate with your state's department of revenue before making tax or financial decisions.
How It Works
Pick a mode
Choose whether you want to add tax to a pre-tax price, or reverse-calculate the pre-tax price from a tax-inclusive total.
Select your rate
Tap a US state preset to apply its combined average rate instantly. Or pick a quick-select rate or enter any custom percentage.
Enter the price
Type any dollar amount in the price field. Results update in real time as you type — no calculate button needed.
See instant results
Get the pre-tax price, tax amount, and total side-by-side, plus a visual bar showing the tax share of the total. Nothing leaves your browser.
How to Use the Sales Tax Calculator
- Choose Add sales tax to start with a pre-tax price, or Find pre-tax price to start from a tax-inclusive total.
- Tap a US state preset — CA, NY, TX, FL, and more — to instantly apply that state's combined average rate.
- Or select a quick rate (5%–10%) or type a custom percentage for your exact local rate.
- Enter the dollar amount. Results update immediately — pre-tax price, tax amount, and total.
- The breakdown bar shows the tax as a visual share of the total price.
US State Sales Tax Rate Reference
The rates below are combined averages (state + local weighted average) as of 2025/2026, sourced from the Tax Foundation annual state & local sales tax report and cross-referenced with individual state departments of revenue. Actual rates vary by city and ZIP code — use these presets as a quick estimate and check your state's department of revenue for exact rates.
| State | Combined Avg. Rate | State Rate Only |
|---|---|---|
| California (CA) | 8.68% | 7.25% |
| New York (NY) | 8.52% | 4.00% |
| Texas (TX) | 8.20% | 6.25% |
| Florida (FL) | 7.02% | 6.00% |
| Illinois (IL) | 8.74% | 6.25% |
| Washington (WA) | 9.21% | 6.50% |
| Colorado (CO) | 7.77% | 2.90% |
| Georgia (GA) | 7.38% | 4.00% |
| Arizona (AZ) | 8.37% | 5.60% |
| New Jersey (NJ) | 6.60% | 6.625% |
| Ohio (OH) | 7.22% | 5.75% |
| Pennsylvania (PA) | 6.00% | 6.00% |
The Sales Tax Formulas
- Add tax: Total = Pre-tax price × (1 + Rate ÷ 100). For a $50 item at 8%: $50 × 1.08 = $54.00.
- Tax amount (adding): Tax = Pre-tax price × Rate ÷ 100. For $50 at 8%: $50 × 0.08 = $4.00.
- Reverse (find pre-tax): Pre-tax = Total ÷ (1 + Rate ÷ 100). For a $54 total at 8%: $54 ÷ 1.08 = $50.00.
- Tax amount (reversing): Tax = Total − Pre-tax. For the same example: $54 − $50 = $4.00.
Common mistake: When reversing, do not multiply the total by the tax rate and subtract — this overstates the pre-tax price. Always divide by (1 + rate), never subtract rate% of the total.
Features
- Private by design: All calculations run in your browser using JavaScript. No price or rate you enter is ever sent to a server.
- No account required: Open the page and start calculating — no sign-up, no email, no paywall.
- Real-time results: Pre-tax price, tax amount, and total update instantly as you type.
- 12 US state presets: Combined average rates (state + local) for the most-searched states, updated for 2025.
- Two calculation modes: Add tax to a price, or reverse-engineer the pre-tax price from a total.
- Custom rate input: Enter any percentage for your exact local rate — no state is off-limits.
- Visual breakdown: A colour bar shows the proportion of pre-tax price vs. tax in the total.
Frequently Asked Questions
How do I calculate sales tax on a price?
Multiply the pre-tax price by the sales tax rate as a decimal and add the result to the price. Formula: Total = Pre-tax × (1 + Rate / 100). For example, a $80 item at 7% tax: $80 × 1.07 = $85.60 total, with $5.60 in tax.
How do I find the pre-tax price from a total?
Divide the total by (1 + the rate as a decimal). For example, $85.60 ÷ 1.07 = $80.00 pre-tax. A common error is to subtract rate% of the total — this gives the wrong answer because the gross total already has an inflated denominator.
Why are the state preset rates "combined" averages?
US sales tax has two layers: a state rate and additional county or city rates. The combined average is the weighted average of all state + local rates across a state — which is what most buyers actually pay. For example, California's state rate is 7.25% but the combined average including local taxes is 8.68%. For your exact ZIP code rate, check your state's department of revenue.
Which US states have no sales tax?
Five states have no state sales tax: Alaska, Delaware, Montana, New Hampshire, and Oregon. Alaska allows local taxes, so some Alaskan cities do charge sales tax. For states not in the presets, enter your local rate in the custom rate field.
Is this calculator accurate enough for invoicing?
The presets are useful for quick estimates, but sales tax rules vary by product type, exemption, and exact locality. For invoicing, accounting, or tax compliance, always verify the applicable rate with your state's department of revenue or a qualified tax professional.
Is any of my data stored or shared?
No. All calculations run in JavaScript entirely inside your browser tab. Nothing you enter is ever sent to a server, stored in a database, or shared with any third party. There is no sign-up, no tracking, and no account required.
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