Stacked discount calculator
Add every discount in the order the store applies them, including an extra % off the sale price and money-off coupons, and see what you really pay.
- 100% free
- Runs in your browser
- No uploads
Final price
Enter a price and your discounts to see what you really pay.
- 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.
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How to use the stacked discount calculator
- Enter the original price. The price before any sale, as shown on the tag or the product page.
- Add each discount in order. Choose % off for a percentage, like 40% off or an extra 20% at checkout, or $ off for a coupon, like $10 off. Add up to 8.
- Add sales tax if you want the final total. The result lists what each discount takes off, the price you pay, the total you save and the real discount percentage.
Common Black Friday stacks and the real discount
Sales often advertise one discount and add another at checkout. This is what they come to:
| Discounts | Looks like | Real discount | $100 item costs |
|---|---|---|---|
| 30% + 20% | 50% off | 44% off | $56 |
| 40% + 20% | 60% off | 52% off | $48 |
| 50% + 20% | 70% off | 60% off | $40 |
| 50% + 25% | 75% off | 62.5% off | $37.5 |
| 60% + 30% | 90% off | 72% off | $28 |
| 70% + 10% | 80% off | 73% off | $27 |
| 25% + 10% + 5% | 40% off | 35.88% off | $64.13 |
When the order of discounts matters
Percentages can be applied in any order and give the same price. Money-off coupons are different. Take an $80 jacket with 25% off and a $10 coupon. With the percentage first, $80 becomes $60 and then $50. With the coupon first, $80 becomes $70 and then $52.50.
So a fixed coupon is worth the most when it comes off last. Stores decide the order at checkout, and the calculator tells you when a different order would have been cheaper.
Black Friday and Cyber Monday tips
Compare final prices, not percentages. 60% off a $150 list price ($60) costs more than 40% off a $90 one ($54).
Check what the extra discount covers. “Extra 20% off” codes often exclude some brands or apply only to full-price items, and some coupons need a minimum spend.
Include shipping and tax. A slightly higher price with free shipping can be the cheaper deal. Add your sales tax rate above to see the real total.
Frequently asked questions
Is 40% off plus an extra 20% off the same as 60% off?
No. The extra 20% comes off the already reduced price. On $100, 40% off leaves $60, and 20% of $60 is $12, so you pay $48. That's 52% off in total, not 60%.
How do I work out an extra 20% off the sale price?
Multiply the sale price by 0.8 (that's 100% − 20%). A $75 sale price becomes $60. For an extra 15% off, multiply by 0.85; for an extra 30% off, by 0.7.
Does the order of discounts matter?
Not for percentages: 40% then 20% gives the same price as 20% then 40%. It does matter for money-off coupons. A $10 coupon taken after the percentages saves the full $10; taken first, the percentages then shrink it. The calculator shows both.
Is sales tax added before or after the discounts?
In most US states, sales tax is charged on what you actually pay after store discounts, which is how this calculator works. Manufacturer coupons can be taxed differently in some states.
What's the formula for several stacked discounts?
Total discount = 1 − (1 − d1) × (1 − d2) × (1 − d3) …, with each discount as a decimal. For 25%, 10% and 5%: 1 − 0.75 × 0.9 × 0.95 = 0.359, so about 35.9% off.