Discount Calculator
Enter the list price and what you actually paid, and this returns the amount saved and the percentage off. Pay 39,000 for something listed at 50,000 and the saving is 11,000, or 22 percent. It is the calculation you need when a page advertises "up to 30% off" and you want to know what your particular basket really came to.
How to use
- Enter the original list price.
- Enter the final price after every coupon and instant discount has been applied.
- Read the amount saved and the effective percentage.
- When comparing products of different sizes, convert to a unit price first, then compare.
When you actually need this
- Checking that the advertised percentage matches what the checkout charged.
- Finding the combined percentage after stacking several coupons.
- Comparing two sellers whose list prices differ but whose discounts look similar.
- Recovering the original price from a sale price to see how deep the cut really was.
Stacked discounts do not add up
Twenty percent off followed by a ten percent coupon is twenty-eight percent off, not thirty, because the second discount applies to the already reduced price: 0.8 × 0.9 = 0.72. The reverse trips people up just as often. To undo a twenty percent discount you divide by 0.8, not multiply by 1.2. A sale price of 39,000 that represented twenty-two percent off implies a list price of 39,000 ÷ 0.78 = 50,000. Percentage points and percentages of a changing base are the two places discount arithmetic usually goes wrong.
Related tools
FAQ
What formula does Discount Calculator use?
It uses the standard published formula for this calculation, applied exactly as written with no rounding until the final result. The inputs you provide are the only variables — there are no hidden assumptions or regional adjustments.
How accurate is the result from Discount Calculator?
The arithmetic is exact to the precision your browser supports. Accuracy in practice depends on your inputs: an estimate built on rounded figures will itself be an estimate, so enter the most precise values you have.
Can I use this for official or financial decisions?
Treat the output as a well-calculated estimate rather than professional advice. For medical, tax, legal or lending decisions, confirm the figure with a qualified professional or the institution involved before acting on it.