Enter a price and discount to see the sale price, or work backward from a sale price to find the original.
The discount percentage is multiplied by the original price to get the amount saved, then subtracted from the original price for the sale price.
If a sale price reflects a known discount percentage, the original price is the sale price divided by (1 minus the discount as a decimal) — this undoes the discount math to recover the starting price.
Not automatically — stacked discounts apply sequentially, not additively (20% off, then another 10% off, is not the same as 30% off). Run the sale price through the calculator twice, once per discount, to get an accurate stacked result.
Stacked discounts multiply, not add — 20% off followed by another 10% off is NOT 30% off. Run the first discount through the calculator, take that sale price, then run it through again as the new 'original price' with the second discount percentage.
Two stacked discounts of 20% and 10% leave you paying 80%×90% = 72% of the original price — a combined 28% off, not 30%. The gap grows the more discounts are stacked, which is why store 'up to 50% off, plus extra 20% off' promotions save less than the headline number suggests.
Worked example: a $200 item with 30% off comes to $140 (you save $60). Working backward, a $140 sale price with a known 30% discount recovers the original $200 exactly — try both tabs above with these numbers to confirm.