Discount Calculator
Calculate the final price after a percentage discount is applied.
Calculate Discount
Enter the original price and discount percentage to find both the amount saved and the final sale price.
Discount amount: Original price × (Discount percentage / 100)
Final price: Original price − Discount amount
How to calculate a discount?
To calculate the discount amount manually:
- Convert the discount percentage to a decimal by dividing by 100. For example, 20% becomes 0.20.
- Multiply the original price by this decimal. If the price is $100, then $100 × 0.20 = $20.
- Subtract this amount from the original price to get the final price: $100 − $20 = $80.
Quick Tip: If an item is 20% off, you are paying 80% of the original price. Multiply the original price by 0.80 to find the final price in one step.
Frequently asked questions
How is a discount calculated?
Multiply the original price by the discount rate divided by 100. Subtract that saving from the original price to get the sale price.
What is 20% off $100?
Twenty percent of $100 is $20, so the final price is $80 before any taxes or other charges.
Can I calculate more than 100% off?
Mathematically, a discount over 100% makes the final price negative. In ordinary retail pricing, discounts normally range from 0% to 100%.
How do I calculate two successive discounts?
Apply each discount to the price remaining after the previous discount. For example, 20% off followed by 10% off is 0.80 × 0.90 = 0.72, or 28% off overall.
Is a 20% discount the same as subtracting 20?
No. A percentage discount depends on the original price. A 20% discount is $20 on $100 but $40 on $200.
Does the discount calculator include sales tax?
The calculator finds the discount from the price entered. Add any applicable sales tax afterward unless the entered price already includes tax.
Related percentage calculators
Use a focused calculator when your question needs a different baseline or a price-specific formula.
Percentage Calculator
Find a percentage, percentage ratio, or percentage change.
Percentage Increase Calculator
Measure how much a value has grown from its starting point.
Percentage Decrease Calculator
Work out the percentage reduction from an original value.
Percentage Difference Calculator
Compare two values when neither one is the original baseline.
Reverse Percentage Calculator
Find an original amount from a final value and percentage.
VAT Calculator
Add VAT to a net price or remove it from a gross total.