Discount Calculator

Finds sale price after a discount, or calculates discount percentage from original and sale prices.

1. Choose whether you know the discount % or the sale price.
2. Enter original price and the known value.
3. View final price and savings.

Percent off the price

Sale price = original × (1 − discount% ÷ 100) · Discount% = ((original − sale) ÷ original) × 100

Source. The sale price is the original price times 1 minus the discount percent divided by 100. The discount percent from two prices is the difference divided by the original price, times 100.

Updated November 1, 2026

$79.99 at 25% off → $59.99 (save $20.00).

• Does not include sales tax on the final price.

How do I calculate 20 percent off a price?

Multiply the original price by 0.80, or subtract 20% of the price. Example: $50 × 0.80 = $40.

Is 20% off plus 10% off the same as 30% off?

No. Sequential discounts multiply: 20% off then 10% off = 0.80 × 0.90 = 72% of original (28% total off), not 70%.