Discount Calculator

About this tool

Use this discount calculator to take a percent off a price, or to find the percent off between an original price and a sale price. It shows the discount amount, what you save, and the final price. It does not answer a generic “what is X% of Y” question.

How to use

1. Choose Percent off, Two prices, or Original.
2. For percent off, enter the original price and the discount percent.
3. For two prices, enter the original price and the sale price.
4. Read the final price, the discount percentage, and how much you save.

How to Calculate a Discount

Discount amount = original price × discount % ÷ 100. Final price = original price − discount amount. You save that discount amount. From two prices, discount % = (original − sale) ÷ original × 100. A sale above the original is rejected. A 100% discount makes the final price 0, and it cannot be used to reconstruct an original price.

Worked example

20 percent off 2,499: discount amount = 2,499 × 20 ÷ 100 = 499.80. Final price = 2,499 − 499.80 = 1,999.20. The same steps give 20% off 1,999 as 399.80 saved and a 1,599.20 final price. Asking what is 20% of 2,499 on the percentage calculator returns 499.80 as a share of the price, which is the saving here, not the final price.

Original price and sale price

Original price is the sticker before the markdown. Sale price is what you pay after the discount. If you know original and percent off, this tool returns the sale price. If you know sale price and percent off, it reconstructs the original.

How much do I save

Savings are original minus sale. 20% off 2,499 saves 499.80 — the same figure shown as “You save”. Stacked discounts (10% then 10%) are not 20%; apply them in order.