calculatorsname
Discount calculator
Enter the original price and the percentage off to see what you pay and what you save. A second discount box handles “an extra 10% off the sale price” without the usual double-counting mistake.
Runs locally in your browser
How it works
A discount of p percent leaves (100 − p) percent of the price, so the price after the discount is original × (1 − p ÷ 100). Two discounts are applied one after the other, never added: 20% then 10% leaves 0.8 × 0.9 = 0.72 of the original, which is 28% off, not 30%. The tool reports the effective total discount so the two figures can be compared. Prices are treated as plain numbers without a currency symbol.
Worked example
An 80 item with 25% off costs 80 × 0.75 = 60. A further 10% off that sale price takes it to 60 × 0.9 = 54, so you save 26 in total. That is 32.5% off the original, not the 35% you would get by adding the two percentages.
Questions and answers
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