Discount Calculator
Sale price, discount percentage or original price — pick what you need
Enter values above to see the result.
About the Discount Calculator
Shop tags, coupon codes and "extra 10% off at checkout" offers all hide the same question: what will I actually pay? This calculator answers it three ways — the price after a discount, the discount percentage between an old and a new price, and the original price when you only know what you paid.
How a discount is calculated
sale price = original × (1 − discount ÷ 100). To find the percentage between two prices: discount % = (original − sale) ÷ original × 100. To go back to the original: original = sale ÷ (1 − discount ÷ 100).
Stacked discounts do not add up
20% off followed by an extra 10% off is not 30% off. The second discount applies to the already reduced price: 100 → 80 → 72, which is a 28% total discount. Use the optional extra discount field to see the real combined figure.
Discount versus markup
A price that drops by 50% has to rise by 100% to get back where it started. Percent changes are always relative to the starting price, which is why "was 200, now 100" is 50% off but "was 100, now 200" is a 100% increase.