How do I calculate a discount?
Multiply the original price by the discount percent divided by 100 to get savings, then subtract from the original price.
Discount Calculator
Find the discounted sale price and how much you save when a percent-off deal is applied.
Enter price and discount
Provide the original price and the discount percentage.
About this calculator
How to use Discount Calculator, plus the formulas and logic behind the results.
Tool description
A discount reduces the sticker price by a percentage. This tool shows both the final sale price and the absolute savings amount.
How to use
- Enter the original (pre-discount) price.
- Enter the discount percent (for example 20 for 20% off).
- Select Calculate to view sale price and savings.
- Use Clear to restore the sample values.
Formulas & reference
Savings = original × (discount ÷ 100)Sale price = original − savingsSale price = original × (1 − discount ÷ 100)
Discount examples
- 20% off $100 → $80 sale price, $20 saved
- 50% off halves the price
- 0% discount leaves the price unchanged
- 100% discount means free (sale price $0)
Calculation logic
The discount rate is applied to the original price to compute savings; the sale price is the remainder. Rates above 100% are rejected.
Does not include sales tax, coupons stacked on top of percent-off, or shipping. Educational estimate only.
Discount Calculator FAQ
Common questions about the calculation and how to interpret the estimate.
What is the sale price?
The amount you pay after the percent-off discount is applied, before tax.
Can the discount be more than 100%?
No. This calculator accepts 0–100% only.
Does this include sales tax?
No. Apply sales tax separately on the taxable amount for your location.
Is “$20 off” the same as 20% off?
Only when the original price is $100. Dollar-off and percent-off are different promotions.
Is this tool free?
Yes—free online calculator with guide and FAQ on this page.