Sales Tax Calculator
Calculate sales tax on any purchase. Enter the price and tax rate to see the tax amount and total price instantly.
Total Price
$108.25
Tax Amount
$8.25
How It Works
This calculator computes sales tax and the final price using these formulas:
- Tax Amount = Price Before Tax × (Tax Rate / 100)
- Total Price = Price Before Tax + Tax Amount
Enter the item price and your local tax rate to see the total cost. The default rate of 8.25% is a common US rate but can be changed to match your area.
Frequently Asked Questions
How do I calculate sales tax?
Multiply the price before tax by the tax rate (as a decimal). For example, if an item costs $100 and the sales tax rate is 8.25%, the tax is $100 × 0.0825 = $8.25, making the total $108.25.
How do I find the pre-tax price from a total that includes tax?
Divide the total price by (1 + tax rate as a decimal). For example, if the total is $108.25 and the tax rate is 8.25%, the pre-tax price is $108.25 / 1.0825 = $100.00.
What is the average sales tax rate in the US?
The average combined state and local sales tax rate in the US is approximately 8.5%, but it varies widely. Some states like Oregon have no sales tax, while others like Louisiana have combined rates exceeding 10%.