Discount Calculator

Work out the sale price, stacked discounts, and sales tax, or find the real percentage off any deal.

You pay—
You save—

Step by step

Discount—
Amount saved—

Extra discounts are applied to the already-reduced price, the way most stores calculate them. Sales tax is added after all discounts. Amounts are rounded for display.

How to use the discount calculator

Choose what you want to find:

  • Find the sale price – enter the original price and the discount. You can also add an extra discount on top, such as a coupon on an item that’s already on sale, and your local sales tax. The calculator shows what you’ll pay, how much you save, and every step of the math.
  • Find the discount % – enter the original price and the sale price to see what percentage you’re really saving.

Pick your currency at the top. Korean won and Japanese yen are shown without decimals.

The formulas

  • Sale price = original price × (1 − discount ÷ 100)
  • Amount saved = original price − sale price
  • Discount % = (original price − sale price) ÷ original price × 100
  • Price with tax = sale price × (1 + tax rate ÷ 100)

Worked examples

  • A $80 jacket at 25% off: 80 × 0.75 = $60.00. You save $20.00.
  • An extra 10% off at the register, plus 8.25% sales tax: the extra 10% comes off the reduced $60 price, so you save another $6.00 and the price becomes $54.00. Tax adds $4.46, so you pay $58.46. Your total saving is $26.00, which is 32.5% off, not 35%.
  • ₩59,000 shoes at 30% off: 59,000 × 0.7 = ₩41,300, a saving of ₩17,700.
  • Was $120, now $84: (120 − 84) ÷ 120 = 30% off.

Why “25% + 10%” isn’t 35% off

When a store offers an extra discount on sale items, the second discount applies to the price that’s already been reduced, not to the original price. That’s why a 25% discount followed by another 10% works out to 32.5% off. Two 50% discounts in a row give 75% off, not 100%. To combine two discounts quickly, multiply what’s left after each: 0.75 × 0.90 = 0.675, so you pay 67.5% of the original price.

Shopping tips

  • Compare the final price, not the percentage. A 40% discount on an inflated “original” price can still cost more than a regular price at another store.
  • “Buy one, get one 50% off” works out to 25% off each item when both items cost the same.
  • Check whether tax is included. In the United States, sales tax is usually added at the register and varies by state and city. In Korea, Japan, and most of Europe, the displayed price already includes VAT or consumption tax, so leave the tax box empty.
  • Mental math shortcut: for 10% off, move the decimal point one place to the left and subtract. 10% of $47 is $4.70, so the sale price is $42.30.

Common questions

Does the order of two discounts matter?

No. Taking 25% off and then 10%, or 10% and then 25%, gives the same final price, because multiplication works in any order.

Should tax be calculated before or after the discount?

In almost all stores, sales tax is charged on the discounted price, which is how this calculator works. Some coupons from manufacturers are treated differently in certain US states, so check your receipt if the numbers don’t match exactly.

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