Question 1

How do I calculate a percentage discount?

Accepted Answer

Multiply the original price by the discount percentage, then divide by 100. That gives you the discount amount. Subtract it from the original price to get the final sale price. For example: 20% off $120 = $120 × 0.20 = $24 saved → $96 final price.

Question 2

What is 30% off a price?

Accepted Answer

To find 30% off any price, multiply the price by 0.30 to get the discount amount, then subtract that from the original. For example, 30% off $150 = $45 discount → $105 final price. Use the calculator above to do this instantly for any amount.

Question 3

How do I find the original price from a discounted price?

Accepted Answer

If you know the sale price and the discount percentage, divide the sale price by (1 − discount/100). For example, if an item costs $80 after a 20% discount, the original price was $80 ÷ 0.80 = $100. The "Find Discount %" mode handles the reverse calculation when you know both prices.

Question 4

What is the difference between a discount and cashback?

Accepted Answer

A discount reduces the price you pay at the point of sale. Cashback is a rebate paid to you after the purchase — you pay the full price upfront and receive a portion back later. Both reduce your effective cost, but cashback requires you to claim it and wait for the refund.

Question 5

How do I calculate successive (stacked) discounts?

Accepted Answer

Successive discounts are not simply added together. A 20% discount followed by a 10% discount is not 30% off. Apply the first discount to get an intermediate price, then apply the second discount to that result. For example, 20% off $100 = $80, then 10% off $80 = $72 — an effective discount of 28%, not 30%.

Discount Calculator