Discount Calculator
Find the final price of a purchase after a discount and how much you save. Supports an extra coupon on top of the discount.
Optional
Enter the price and the discount.
How it works
You enter the original price and the discount percentage, and the tool instantly shows three things: the final price to pay, how much you save in dollars, and the total discount as a percentage. If there's an extra coupon, just fill in the third field.
The final price calculation is straightforward: you multiply the price by the fraction that remains after the discount. A 30% discount, for example, leaves 70% of the price — so the final price is the price multiplied by 0.70.
When there's an extra coupon, it applies on top of the already-discounted price, not added to the first one. That's how most stores do it: first the sale discount, then the coupon on the reduced amount. So a 30% discount plus a 10% coupon doesn't equal 40% — the real total discount is a bit lower, and the tool works out exactly how much.
When to use
Any time you come across a sale and want to know what you'll really pay, or to check whether the advertised discount matches the price on the tag. It's useful in the store, online, during big sales, and in any negotiation where a percentage comes up.
It also helps compare offers: sometimes "20% off" a more expensive item works out to a higher final price than "10%" off a cheaper one. Seeing the final price in dollars, side by side, makes the comparison honest. And the extra-coupon field is handy for the layered promotions that are increasingly common.
Practical examples
A simple sale
An item at $199.90 with 30% off comes to $139.93, saving $59.97. The final price appears as soon as you type the two fields.
Discount plus coupon
The same item with 30% off and an extra 10% coupon: the coupon applies to the $139.93, giving $125.94. The real total discount is about 37%, not 40% — the tool shows that exact figure.
Common mistakes
The most common mistake is adding the percentages of stacked discounts. "30% + 10%" looks like 40%, but it isn't: the second discount applies to the already-reduced amount, so the real total is around 37%. Confusing this leads you to expect a lower final price than you're charged.
Another slip is calculating the discount on the wrong value. The percentage always applies to the full price (for the first discount), not to the amount you imagine paying. Reversing the calculation produces distorted results.
There's also the confusion between "X% off" and "pay X% of the price". Paying "70% of the price" is the same as a 30% discount — but reading quickly can flip the reasoning. Always looking at the final price in dollars avoids that trap.
Frequently asked questions
How do I calculate 30% off?
Multiply the price by 0.70 (what remains after removing 30%). For example, $200 with 30% off comes to $140. The tool does this automatically and also shows how much you saved.
Do two consecutive discounts add up?
No. The second discount applies to the amount already reduced by the first. So 30% plus 10% results in about 37% total discount, not 40%.
Can I use it for markups instead of discounts?
This tool is built for discounts. For markups, such as interest or fees, the calculation is different, since the percentage is added to the price instead of subtracted.
Is the total discount always less than the sum of the two?
Yes, when the discounts are applied in sequence. Because the second applies to an already-smaller amount, the combined effect is always a little below the simple sum of the percentages.