Discount Calculator
This discount calculator turns a price and a percent off into the sale price and what you save. Type the original price and the discount, and you'll see the new price right away. Stack a second discount, add your sales tax for the real checkout total, or flip it around to find the percent off from a price drop. It's free, private, and quick while you're shopping.
- Sale price & savings
- Stacked discounts
- Sales tax
- Reverse percent off
- Effective total off
Last updated June 17, 2026 25% off means you pay 75% Reviewed by the Calcowa team
Enter a price of 0 or more.
Extra discount stacks on the reduced price. Sales tax applies to the discounted price.
That's 20% off, a saving of $10.00.
$80 × (1 − 0.25) = $60.00
How do I calculate a discount?
A discount is a percentage taken off the price, so the saving is the price times the percent, and the sale price is what's left. The quick way is to flip it: 25 percent off means you pay 75 percent, so 80 dollars times 0.75 is 60 dollars, a 20 dollar saving. This discount calculator runs that and goes further, stacking a second discount in order rather than just adding the percentages, and folding in sales tax on the reduced price for the real total. There's also a reverse mode, so if you only know the original and the sale price, it tells you the percent off.
Taking 25% off $80, step by step
Here's a 25 percent discount on an 80 dollar item. It's the same path the tool runs for any price:
- 1
Find the saving80 dollars times 25 percent, or 0.25, is a 20 dollar saving.
- 2
Subtract it80 minus 20 leaves a 60 dollar sale price.
- 3
Stack any extraAn extra 10 percent off the 60 would bring it to 54.
- 4
Add tax if anyAt 8 percent tax, 60 dollars becomes 64.80 at the register.
Sale prices at common discounts
Here's what you pay at the usual discount levels for a few prices, before tax. The calculator handles any price and percentage for the exact figure.
| Price | 20% off | 30% off | 50% off |
|---|---|---|---|
| $25 | $20.00 | $17.50 | $12.50 |
| $50 | $40.00 | $35.00 | $25.00 |
| $80 | $64.00 | $56.00 | $40.00 |
| $100 | $80.00 | $70.00 | $50.00 |
| $150 | $120.00 | $105.00 | $75.00 |
Frequently asked questions
Multiply the price by the percent off as a decimal to get the savings, then subtract that from the price for the sale price. So 25 percent off 80 dollars is a 20 dollar saving and a 60 dollar sale price. This discount calculator does it instantly, and it handles a second stacked discount and sales tax too, so you'll see the real final price, not just the headline cut.
Sale price is the original price times one minus the discount. At 25 percent off, that's 80 times 0.75, which is 60 dollars. An easy shortcut: 25 percent off means you pay 75 percent, so multiply by 0.75. The tool shows the sale price, the amount you save, and the final price after tax, all from the original price and the percent off.
It's a second discount applied after the first, like an extra 10 percent off an already-reduced price. They don't simply add up: 25 percent then 10 percent isn't 35 percent off. The tool applies them in order, so 80 dollars at 25 percent is 60, then 10 percent off that is 54, an effective 32.5 percent off. Enter the extra percent and you'll see the true total.
Divide the amount you saved by the original price, then times 100. If a 50 dollar item now costs 40, you saved 10, and 10 divided by 50 is 0.2, or 20 percent off. The reverse box above does this for you: type the original and the sale price, and it shows the percentage discount you're getting.
It can. Enter your sales tax rate and the tool adds it to the discounted price for the final amount you'll pay at the register. Tax is charged on the sale price, not the original, so a discount lowers the tax too. Leave the tax field at zero to see the pre-tax sale price on its own.
Yes to both. There's no sign-up, no limit, and nothing to install, since it runs in your browser. The prices you type stay on your device and aren't sent anywhere. Bookmark it on your phone and you'll have a quick way to check a sale price while you're shopping.
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