Discount calculator
Sale price after a percentage discount: price x (1 - rate). Example: 80,000 with 25% off is 60,000, saving 20,000.
Formula estimate only. Rates, taxes, and legal rules vary by jurisdiction.
What to know
The discount page needs two numbers, an Original price and a Discount rate in percent, and shows the discounted price, the discount amount and the original price. The formula is discounted price = price x (1 - rate / 100).
Worked example: 80,000 with 25 percent off gives 80,000 x 0.75 = 60,000, a saving of 20,000. With 12.5 percent off a price of 1,000,000 the shopper pays 875,000. A rate of 0 returns the original price, and 100 returns 0.
The rate must lie between 0 and 100 and is applied once. Stacked offers do not add up: 20 percent followed by 10 percent leaves 80,000 x 0.8 x 0.9 = 57,600, a 28 percent combined discount rather than 30. Run the page twice, feeding the first result into the second.
The page works backwards only by hand: to learn the original price from a sale price, divide by (1 - rate). It does not add VAT or shipping, so for a Korean tax-inclusive price combine it with the VAT page.
To compare offers, calculate the final price rather than the rate alone: 30 percent off 120,000 costs 84,000, while 25 percent off 100,000 costs 75,000, so the smaller rate on the cheaper item wins on price.
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How to use Discount calculator
- Enter Original price 80,000.
- Enter Discount rate (%) 25.
- Read the Discounted price line, which shows 60,000.
- Check Discount amount below it, which shows 20,000.
Quick answers
What is 30 percent off 49,900?
34,930. Compute 49,900 x 0.7, giving a saving of 14,970.
Do two successive discounts add together?
No. 20 percent then 10 percent is 28 percent in total, because the second applies to the reduced price.
How do I find the original price from the sale price?
Divide the sale price by (1 - rate). A 60,000 price after 25 percent off was 60,000 / 0.75 = 80,000.