Sales Tax Calculator
Calculate your exact sales tax instantly. Use the 'forward' mode to add tax to a sticker price, or use the 'backward' extraction mode to determine the pre-tax price of a final receipt.
How to Use the Sales Tax Calculator
Using our sales tax calculator is simple and requires no registration:
- Select your Calculation Goal: Do you want to add tax to a price, or extract tax backward from a total?
- Enter the Amount (either your pre-tax sticker price, or the final receipt total).
- Enter your local Sales Tax Rate percentage.
- The calculator will instantly provide the exact tax amount owed, as well as a full receipt breakdown.
Why Use a Sales Tax Calculator?
Whether you're budgeting for a major purchase or you're a business owner trying to back out the tax from a flat-rate invoice, this Sales Tax Calculator handles the complicated extraction math instantly, ensuring your accounting is flawless.
How to Calculate Sales Tax in 2026
Unlike many other countries that include taxes in their sticker prices (like the VAT system in Europe), the United States adds sales tax at the cash register. Because of this, the price you see on the shelf is rarely the actual price you will pay.
Using a sales tax calculator is essential for budgeting large purchases like cars, electronics, or appliances, where a seemingly small 8% tax rate can suddenly add hundreds or thousands of dollars to your final bill.
The Formula: Adding Sales Tax
If you know the sticker price of an item and you want to know how much tax will be added, the math is straightforward. First, convert your local tax percentage into a decimal (e.g., 8.5% becomes 0.085).
How to Extract Sales Tax From a Total
Often, business owners need to do the math backward. If you charge a customer a flat $100 for a service and your state requires you to remit a 7% sales tax from that total, you cannot simply calculate 7% of $100. Doing so will result in the wrong number.
To extract tax from a total, you must divide the total by (1 + the tax rate).
Why Your Sales Tax Rate is Complex
In the US, there is no federal sales tax. Instead, you are charged a combination of State, County, and City taxes. For example, your state might charge a 4% base rate, but your specific city might add a 3% local tax, bringing your total to 7%.
Furthermore, certain items are tax-exempt depending on the state. Groceries and prescription drugs are commonly exempt from sales tax, while prepared hot foods at restaurants are usually fully taxed.