Finance & money · Shopping
Discount Calculator
Calculate the final price after a percentage discount, with optional tax. Find out exactly how much you save on any purchase with this free discount calculator.
Enter values above to see the result.
How it works
Calculates the final price after applying a percentage discount, with an optional tax applied after the discount.
Step by step
- 1Enter the original price and discount percentage.
- 2Optionally select a tax rate to apply after the discount.
- 3Discounted price = original × (1 − discount/100).
- 4Final price = discounted price + (discounted × tax/100).
Examples
20% off $100
100 × (1 − 0.20) = 80. You save $20.
Inputs
- original:
- 100
- discount:
- 20
- taxMode:
- 0
Result
- discounted:
- 80
- savings:
- 20
- final:
- 80
30% off $200
200 × 0.70 = 140. You save $60.
Inputs
- original:
- 200
- discount:
- 30
- taxMode:
- 0
Result
- discounted:
- 140
- savings:
- 60
- final:
- 140
Frequently asked questions
How do I calculate 20% off $100?▾
Multiply $100 by (1 − 0.20) = 0.80. The sale price is $80, saving you $20.
How is tax applied after a discount?▾
First apply the discount to get the discounted price, then multiply by (1 + tax rate/100) to get the final price.