How to use
- Enter the original price and the discount in percent – optionally a second discount.
- Final price, savings and total discount appear instantly.
- Below, calculate the percent off from the old and new price.
Stacked discounts done right
Two discounts are applied one after the other, not added: 20% plus another 10% equals 28% off, not 30%. The second discount applies to the already reduced price.
Formula: final price = price × (1 − discount ÷ 100). Percent off = (1 − new price ÷ old price) × 100.
Frequently asked questions
How do I calculate 30% off?
Price × 0.7. $80 becomes $56, saving $24.
Why isn't 20% + 10% equal to 30%?
Because the second discount comes off the already reduced price: $100 → $80 → $72, so 28% in total.
How much do I save at $89 instead of $120?
(1 − 89 ÷ 120) × 100 ≈ 25.8%.