Discount Calculator
See the sale price and your savings. Enter the original price and the discount percentage.
Enter values to calculate.
How to calculate
The discount calculator has two parts: amount saved = price × (discount % ÷ 100), and final price = original price − amount saved. The same relationship can be written as final price = price × (1 − discount % ÷ 100), which is often faster if you only need the sale price.
By hand, a $65 item at 30% off: 0.30 × 65 = $19.50 saved, so the final price is 65 − 19.50 = $45.50. Using the shortcut instead: 65 × 0.70 = $45.50 — same answer, one less step.
Stacked discounts don't add up the way they look — 20% off plus an extra 10% off is not 30% off. The second discount applies to the already-reduced price: $100 at 20% off becomes $80, then 10% off that is $8, for a final price of $72 and a combined discount of 28%, not 30%.
Examples
- 25% off 100: you save 25, final price 75.
- 40% off 80: you save 32, final price 48.
- 35% off 140: you save 49, final price 91.
- 15% off 220: you save 33, final price 187.
Frequently asked questions
- How do I calculate a discount?
- Multiply the price by the discount percentage divided by 100 to get the amount saved, then subtract it from the price.
- How do I find the final price after a discount?
- Subtract the amount saved from the original price, or multiply the price by (1 − discount ÷ 100).
- Does 20% off plus an extra 10% off equal 30% off?
- No. Stacked percentage discounts multiply, not add. Taking 20% off first leaves 80% of the price, then 10% off that leaves 90% of that — 0.80 × 0.90 = 0.72, so the combined discount is 28%, not 30%. Applying discounts in either order gives the same 28% result.
- How do I find the original price before a discount?
- Divide the sale price by (1 − discount % ÷ 100). If an item costs $76 after a 20% discount, divide 76 by 0.80 to get the original price of $95. This reverses the discount formula, which is useful when a receipt only shows the final price and the percentage off.