Discount Calculator

The formula

discount amount = (price × discount%) ÷ 100 · final price = price − discount amount

With a second discount, it is applied to the price left after the first: final = price × (1 − d1 ÷ 100) × (1 − d2 ÷ 100). Amount saved = price − final, and effective discount = saved ÷ price × 100.

Worked example

A product priced at 2,000 with a 25% discount: the discount amount is (2,000 × 25) ÷ 100 = 500, so the final price is 2,000 − 500 = 1,500.

A quick shortcut

If you only need the final price, you can skip the subtraction step by multiplying the price by (100 − discount%) and dividing by 100. For a 25% discount, that's price × 0.75.

Common mistakes when comparing sale prices

• Comparing "% off" claims without checking the original price is genuine
• Forgetting that stacked discounts multiply rather than add
• Assuming tax is already included in the discounted price

Working backward from a sale price

If a tag shows only the sale price and the percentage off, the original price is the sale price ÷ (1 − discount ÷ 100). A jacket on sale for 1,500 at 25% off was originally 1,500 ÷ 0.75 = 2,000. Type 2,000 and 25 into the calculator to confirm that the final price comes back as 1,500.

Stacked discounts, worked through

Take 2,000 with 25% off, then an extra 10% coupon. Enter 25 as the discount and 10 as the second discount. The first step gives 1,500; the coupon removes 150 from that, leaving 1,350. You saved 650 in total, an effective discount of 32.5% of the original price, not 35%.

Tax, rounding and fixed-amount coupons

In the US and Canada, prices on the shelf normally exclude sales tax, so 8% tax on the 1,500 sale price adds 120 and the total is 1,620. In the EU, the UK, India, Australia and many other countries, the displayed price already includes VAT or GST, and the discount applies to that tax-inclusive figure. Stores may round per item or per receipt, so a total can differ by a cent or two from this tool's two-decimal result.

A coupon worth a fixed amount, such as 200 off a 2,000 item, is the same as a percentage: 200 ÷ 2,000 = 10%. Enter that percentage to see the final price. The calculator accepts any non-negative percentage, so keep it at or below 100; a higher value would produce a negative price.

Limits

• At most two percentage discounts; for a third, run the calculator again with the result as the new price.
• Percentages only: a fixed-amount coupon has to be turned into a percentage first.
• The second discount always applies to the already-reduced price, never to the original.
• Tax, shipping and minimum-spend conditions are not included, and results are rounded to two decimals.
• Each percentage must be between 0 and 100, and a blank second discount is treated as none.