Discount Calculator
Enter the original price and the percent off to see the sale price and what you save.
Quick answer: Sale price = original price × (1 − discount ÷ 100). A 30% discount on $80 gives a sale price of $56, a saving of $24.
How to use it
- Type the original price and the discount.
- Add an extra discount, such as a coupon, if there is one. The two are applied one after the other.
- Add sales tax if you want the final price at the till.
Sale prices at a glance
| Discount | $20 | $50 | $80 | $100 | $200 |
|---|---|---|---|---|---|
| 10% | $18.00 | $45.00 | $72.00 | $90.00 | $180.00 |
| 15% | $17.00 | $42.50 | $68.00 | $85.00 | $170.00 |
| 20% | $16.00 | $40.00 | $64.00 | $80.00 | $160.00 |
| 25% | $15.00 | $37.50 | $60.00 | $75.00 | $150.00 |
| 30% | $14.00 | $35.00 | $56.00 | $70.00 | $140.00 |
| 40% | $12.00 | $30.00 | $48.00 | $60.00 | $120.00 |
| 50% | $10.00 | $25.00 | $40.00 | $50.00 | $100.00 |
| 70% | $6.00 | $15.00 | $24.00 | $30.00 | $60.00 |
Two discounts do not add up. 20% off followed by a further 10% off is 28% off in total, not 30%, because the second discount applies to the already reduced price.
What people use it for
- Checking a sale price
- Comparing offers and coupons
- Working out the final price with tax
- Budgeting for shopping
- Teaching percentages
Questions
How do I calculate a discount?
Multiply the price by the discount percentage divided by 100 to get the saving, then subtract it from the price.
What is 20% off $100?
The saving is $20 and the sale price is $80.
How do two discounts combine?
Apply them one after the other. 20% then 10% off $100 gives $72, which is 28% off.
Is it free?
Yes. No sign-up, no install and no limit.
Is anything saved or sent?
No. Everything runs in your browser. Only your own best score, where a page shows one, is kept on your device.
Last updated 2026-10-24. Free to use, no sign-up. Made by ficklestudio26.