Calculating sales tax using a percentage calculator is straightforward. Here’s how you can do it:

  1. Determine the Sale Price: Identify the total price of the item before tax.
  2. Find the Sales Tax Rate: Know the sales tax percentage for your area (e.g., 7%).
  3. Use the Formula: Multiply the sale price by the sales tax rate (expressed as a decimal). The formula is:Sales Tax=Sale Price×(Sales Tax Rate100)\text{Sales Tax} = \text{Sale Price} \times \left(\frac{\text{Sales Tax Rate}}{100}\right)Sales Tax=Sale Price×(100Sales Tax Rate​)
  4. Add the Sales Tax to the Sale Price: To find the total amount including tax, add the sales tax to the sale price:Total Price=Sale Price+Sales Tax\text{Total Price} = \text{Sale Price} + \text{Sales Tax}Total Price=Sale Price+Sales Tax For more information please visit percentager

Example

  • Sale Price: $100
  • Sales Tax Rate: 7%
  1. Convert the percentage to a decimal: 7% = 0.07
  2. Calculate the sales tax: Sales Tax=100×0.07=7\text{Sales Tax} = 100 \times 0.07 = 7Sales Tax=100×0.07=7
  3. Calculate the total price: Total Price=100+7=107\text{Total Price} = 100 + 7 = 107Total Price=100+7=107

So, the total price including tax would be $107.

If you have an online percentage calculator, you can simply input the sale price and the tax rate to get the same results.