How to calculate a discount

Enter the original price and the discount percentage. The calculator finds the amount deducted and subtracts it from the original price to show the final sale price.

Discount formula

• Discount amount = Original price × Discount rate ÷ 100
• Sale price = Original price − Discount amount

Worked example: 25% off a $120 item

Multiply $120 by 25% to find the discount: $120 × 0.25 = $30. Subtract the $30 saving from the original $120 price to get a sale price of $90 before tax and shipping.

For successive discounts, calculate each discount on the price remaining after the previous discount. Two 20% discounts do not equal a single 40% discount: $100 reduced by 20% twice becomes $64.

Frequently asked questions

Can I calculate a 100% discount? Yes. A 100% discount results in a final price of zero.

Does this include sales tax? No. Tax, shipping and other checkout charges are not included.

Related guide: Percentage points vs. percent change explains two commonly confused percentage concepts.