How these calculations work
Finding the sale price multiplies the original price by the discount percentage to get the amount saved, then subtracts that from the original price. Finding the discount percentage works the other way: it takes the difference between the two prices, divides by the original price, and converts that to a percentage.
Why it's worth double-checking discounts
Store signage sometimes rounds discount percentages or applies them to a different reference price than expected, so a "50% off" sign doesn't always match the math on the price tag. Calculating both directions — sale price and actual discount percentage — makes it easy to confirm you're getting the deal that's advertised, especially useful when stacking multiple discounts or comparing offers between stores.
Frequently asked questions
Can I calculate two discounts stacked together, like 20% off plus an extra 10%?
Enter the first discount using the sale price calculator to get the intermediate price, then use that result as the 'original price' in a second calculation with the next discount percentage — stacked discounts apply one after another, not added together.
Why is 20% off followed by 10% off not the same as 30% off?
Because the second discount applies to the already-reduced price, not the original price. Two smaller discounts applied in sequence always add up to slightly less total savings than one combined discount of the same sum.
How do I check if a store's advertised discount is accurate?
Use the second calculator: enter the original price and the price you were actually charged, and it will tell you the real discount percentage — useful for confirming a sale is what it claims to be.
Does this handle percentage discounts only, or fixed-amount discounts too?
This version is built around percentage discounts. For a fixed-amount discount (like '$10 off'), simply subtract that amount from the price directly — no calculator needed.