Discount Calculator
About Discount Calculator
The discount calculator applies a discount percentage to an original price, then estimates sales tax and final price.
How to Use
The discount calculator applies a discount percentage to an original price, then estimates sales tax and final price. Enter the Original price, Discount percent, and Sales tax rate values and review the Discount amount, Sale price, Tax amount, and Final price outputs after you calculate.
- Open the calculator : Use Discount Calculator from the Business category.
- Check the inputs : Review the required values and any optional settings.
- Read the formula : Use the formula and notes below to understand how the result is produced.
Common Questions
What formula does the Discount Calculator use?
Sale price = original price x (1 - discount rate).
Does a double discount of 20% and 30% equal 50%?
No. When discounts are stacked, the second discount applies to the new subtotal, not the original price. For a $100 item, a 20% discount brings it to $80. Taking 30% off that $80 removes $24, leaving a final price of $56. The total effective discount is 44%, not 50%.
How do you calculate a 20% discount quickly?
To mentally calculate a 20% discount, simply find 10% of the price by moving the decimal point one place to the left, and then double that number. For example, 10% of $45 is $4.50. Double that to get $9.00 off.
Inputs
- Original price
- Discount percent
- Sales tax rate
Outputs
- Discount amount
- Sale price
- Tax amount
- Final price
Formula
Sale price = original price x (1 - discount rate).