How Do I Calculate %Tax?

Add the tax rate to the cost of your good or service. If the tax rate is expressed as a percentage, convert it to decimal form by multiplying the result by 100. Then multiply this number using the formula below.

How Do You Find The Price With Tax?

You can determine the retail price from the total price if you know the state sales tax rate. To convert the state sales tax rate to a decimal, divide it by 100.
The state sales tax rate is increased by a decimal of 1.
To determine the retail price, divide the outcome by the total cost.