Discount calculator
Find the sale price after a discount, stack an extra percentage off, add sales tax, and see how much you really save.
- 100% free
- Runs in your browser
- No uploads
Sale price
Enter a price and a discount to see the sale price.
- Runs on your deviceEvery tool works directly in your browser. No files are uploaded.
- Your privacy mattersYour files never leave your device, so there's nothing for us to store.
- No limitsUse any tool as much as you need. No daily caps, no waiting.
- Completely freeNo signup and no trial to cancel. Ads keep the tools free.
How to use the discount calculator
- Enter the original price. The price before any discount.
- Enter the discount as a percentage or as money off. If there's a further discount on top, such as an extra 10% off sale items, add it as the extra discount.
- Add sales tax if you want the final total. The result shows the sale price, each discount in dollars, the tax, the total saved and the overall discount percentage.
Discount formulas
| What you want | Formula | Example |
|---|---|---|
| Sale price | Price × (1 − discount ÷ 100) | $80 × 0.75 = $60 |
| Two discounts | Price × (1 − d1 ÷ 100) × (1 − d2 ÷ 100) | $80 × 0.75 × 0.9 = $54 |
| Total discount | Saved ÷ price × 100 | $26 ÷ $80 = 32.5% |
| With sales tax | Sale price × (1 + tax ÷ 100) | $54 × 1.08 = $58.32 |
Why stacked discounts don't add up
A jacket costs $80. It's 25% off, and there's an extra 10% off at the till. The first discount takes off $20, leaving $60. The extra 10% is taken off $60, not $80, so it's only $6. You pay $54 and save $26, which is 32.5% of the original price, not 35%.
The combined discount is always 1 − (1 − first) × (1 − second). The order doesn't matter: 10% then 25% also gives $54.
Shopping tips
Compare the final price, not the percentage. 40% off a $120 list price ($72) costs more than 25% off a $90 one ($67.50).
Check what the discount applies to. “Up to 50% off” may cover only a few items, and some coupons exclude sale items or apply before other offers.
Frequently asked questions
How do I calculate a discount?
Multiply the price by the discount percentage and divide by 100 to get the amount off, then subtract it. 25% off $80: 80 × 25 ÷ 100 = $20 off, so you pay $60. Or multiply by what's left: 80 × 0.75 = $60.
Do two discounts add up? Is 20% plus 10% off the same as 30% off?
No. The second discount is taken from the already reduced price. On $100, 20% off gives $80, and 10% off $80 is $8, so you pay $72: 28% off in total, not 30%. Two 50% discounts make 75% off, not 100%.
Is sales tax worked out before or after the discount?
In most US states, sales tax is charged on the price you actually pay after a store discount, which is how this calculator does it. Manufacturer coupons can be treated differently in some states.
How do I find the discount percentage from two prices?
Choose Amount off and enter the difference, or divide the saving by the original price and multiply by 100. A $50 item on sale for $35 is $15 off: 15 ÷ 50 × 100 = 30% off.
Why might the total differ by a cent from the shop's?
The calculator rounds the sale price to the nearest cent, then rounds the tax to the nearest cent. Some tills round each item separately or round tax differently, which can change the last cent.