Discount Calculator

Multiply the original price by the discount percentage divided by 100. For a 25% discount on $120: $120 × 0.25 = $30 savings, final price = $90.

Divide the sale price by (1 - discount%). For a $90 item at 25% off: $90 / 0.75 = $120 original price.

Retailers often use 10-30% for regular sales, 40-60% for clearance, and 70%+ for final clearance. Be cautious — stores may inflate original prices before discounting.

Stacked discounts are applied sequentially, not added together. A 20% off, then 10% off does not equal 30% off. It equals 1 - (0.8 × 0.9) = 28% off.

Multiply the remaining percentages: (1 - d1/100) × (1 - d2/100) × original price. Two 20% discounts = 0.8 × 0.8 = 64% of original = 36% total discount.