Sales Tax Calculator
Enter a price and sales tax rate below to instantly get the total price.
Total Price
$85.8
Sales tax: $5.8
How to Calculate Sales Tax
Total price = price + (price × tax rate).
Worked example
An $80 purchase at a 7.25% sales tax rate.
Tax: 80 × 0.0725 = $5.80
Total: 80 + 5.80 = $85.80
Frequently Asked Questions
How do you calculate sales tax?
Multiply the price by the tax rate (as a decimal) to get the tax amount, then add that to the price to get the total.
Does sales tax rate vary by location?
Yes. In the US, sales tax is set at the state and often the city/county level, so the rate varies widely — this calculator lets you enter whatever rate applies where you are.
How do you back out the pre-tax price from a total?
Divide the total by (1 + tax rate as a decimal). For example, an $85.80 total at 7.25% tax means the pre-tax price was 85.80 ÷ 1.0725 = $80.
Related Calculators
- LCM Calculator — General Math
- GCF Calculator — General Math
- LCD Calculator — General Math
- Factors Calculator — General Math