Sales Tax Calculator -

Q: How do I find my local sales tax rate?

Check your state revenue department website -- many U.S. states let you look up the combined rate by ZIP code.

Q: How do I reverse-calculate the pre-tax price?

Divide the total by (1 + rate/100). Example: $108.50 at 8.5% tax = $108.50 / 1.085 = $100.00.

Sales Tax Calculator

Price Before Tax ($)

Tax Rate (%)

How to Use This Sales Tax Calculator

Enter the pre-tax price of the item.
Enter your local sales tax rate as a percentage (e.g., 8.5).
Click "Calculate Total" to see the tax amount and final price.

Formula & Worked Example

Tax Amount = Price × (Tax Rate ÷ 100)

Total Price = Price + Tax Amount

Example

$100 item at 8.5% tax: Tax = $100 × 0.085 = $8.50. Total = $100 + $8.50 = $108.50.

Frequently Asked Questions

How do I find my local sales tax rate?

Check your state revenue department website — many U.S. states let you look up the combined state + county + city rate by ZIP code. Rates change, so verify before big purchases.

Is sales tax applied before or after discounts?

In most jurisdictions, sales tax applies to the discounted price — the amount you actually pay for the item. Manufacturer coupons are sometimes treated differently than store discounts.

How do I reverse-calculate the pre-tax price?

Divide the total by (1 + rate/100). For example, $108.50 total at 8.5% tax: $108.50 ÷ 1.085 = $100.00 pre-tax price.

Shahnawaz

Shahnawaz is the founder of DaProfitClub, a free online platform offering 100+ calculators and converters for finance, health, math, and everyday life. With a background in finance and mathematics, he designs accurate, easy-to-use tools.

Sources: Tax Foundation (taxfoundation.org) — state and local sales tax rates; U.S. Census Bureau — sales tax collections data.