How to use this tool
- Enter the original price and the discount percentage.
- Add a second discount if there is an extra code or clearance offer.
- Add tax if your prices are shown before tax, as in most US shops.
20% off common prices
| Price | You save | You pay |
|---|---|---|
| 25 | 5 | 20 |
| 40 | 8 | 32 |
| 60 | 12 | 48 |
| 99.99 | 20.00 | 79.99 |
| 150 | 30 | 120 |
If the shop then takes a further 10% off at the till, the total discount is 28%, not 30%. Enter the extra discount above to see the exact price.
Frequently asked questions
What is 20% off $80?
$64. You save $16.
How do I calculate 20% off in my head?
Find 10% (move the decimal one place), double it and subtract.
Is 20% off then 20% off the same as 40% off?
No, it equals 36% off.
Need more detail? See the full Discount Calculator guide.
Sources and references
- Federal Trade Commission: Guides Against Deceptive Pricing (16 CFR 233)
- CTSI: Guidance for Traders on Pricing Practices (UK, April 2026)