Sales Tax Breakdown
First calculate the tax amount, then add it to the pre-tax price to get the final total.
Tax Amount = Pre-tax Price × Tax Rate ÷ 100
= $100 × 8.25 ÷ 100 = $8.25
Total = $100 + $8.25 = $108.25
✦ Free • Instant Results • Clear Breakdown
Sales Tax Calculator
Calculate the sales tax amount and the total price including tax.
Enter the pre-tax price and tax rate to see your full breakdown.
01
Calculate Sales Tax
Enter the price before tax and the sales tax rate.
YOUR RESULT
Total Price Including Tax
Pre-tax price = $100.00; sales tax rate = 8.25%
$108.25Sales tax adds $8.25 to the original price.
Tax amount: $8.25
✓CalculatedFrom your values
Formula Used
Use these formulas to find the sales tax and final price.
Sales Tax = Pre-tax Price × Tax Rate ÷ 100Total Price = Pre-tax Price + Sales Tax
$100 × 8.25 ÷ 100 = $8.25; $100 + $8.25 = $108.25
This calculator applies one tax rate to the entered price. Local rules, exemptions, and tax-on-fee rules may vary.
Step-by-Step Solution
Follow the calculation using the values you entered.
1
Identify the pre-tax price and tax ratePrice = $100; tax rate = 8.25%
2
Calculate the sales tax amount$100 × 8.25 ÷ 100 = $8.25
3
Add the tax to the pre-tax price$100 + $8.25 = $108.25
LEARN THE CONCEPT
What Is a Sales Tax Calculator?
A sales tax calculator estimates the tax charged on a purchase and the final amount you pay after tax. Enter the price before tax and the applicable sales tax rate to calculate both the tax amount and the total price.
For example, if an item costs $100 before tax and the sales tax rate is 8.25%, the tax is $8.25 and the total is $108.25. Actual tax can depend on the item's taxability, location, exemptions, and applicable local rules.
FORMULA EXPLAINED
How to Calculate Sales Tax
Convert the tax rate to a decimal by dividing it by 100, multiply it by the pre-tax price to find the tax, then add the tax to the original price.
Sales Tax=Pre-tax Price × Tax Rate ÷ 100Total Price=Pre-tax Price + Sales Tax
Worked Example
A $100 purchase with 8.25% tax
Tax amount: $100 × 8.25 ÷ 100 = $8.25
Total price: $100 + $8.25 = $108.25
You pay $108.25 including the estimated sales tax.Sales Tax Examples
Related Sales Tax Formulas
Sales tax amountPre-tax Price × Tax Rate ÷ 100
Total after taxPre-tax Price + Sales Tax
Tax rate(Sales Tax ÷ Pre-tax Price) × 100
Pre-tax priceTotal Price ÷ (1 + Tax Rate ÷ 100)
The tax-rate formula requires a pre-tax price greater than zero.
Sales Tax Calculator FAQs
How do I calculate sales tax?
Multiply the pre-tax price by the sales tax percentage and divide by 100. Add the tax amount to the pre-tax price to find the total.
What is 8.25% sales tax on $100?
8.25% of $100 is $8.25. The total price after tax is $108.25.
Does the calculator include tax in the original price?
No. Enter the price before tax. The calculator then adds the estimated tax to show the total.
Can I calculate a 0% tax rate?
Yes. With a 0% rate, the tax amount is zero and the total remains equal to the pre-tax price.
Can the sales tax rate be over 100%?
This calculator accepts rates from 0% to 100%. If your situation uses a rate outside this range, check the applicable tax rules and calculation method.
How can I find the price before tax?
Divide the total price by 1 plus the tax rate expressed as a decimal. For example, with a 10% rate, divide the tax-inclusive total by 1.10.