Discount & Sale Price Calculator
Find the exact sale price and savings from any discount — or work backwards from a sale price to find the original.
Works for a single item or a whole cart — just adjust the quantity.
How to Use the Discount Calculator
Two quick modes for two common situations.
Pick a mode
Use "Find Sale Price" if you know the original price and discount. Use "Find Original Price" if you only know what you paid.
Enter the price and discount
Add the relevant price and the discount percentage being offered or already applied.
See your savings
Get the final price, the exact amount saved, and the savings percentage — instantly.
How This Calculator Works
Simple math, but easy to get wrong with stacked discounts.
➗ The discount formula
Discount amount = original price × discount percentage. Subtract that from the original price to get your final sale price — the math this calculator runs instantly.
📚 Reverse calculation
To find the original price from a sale price, divide the sale price by (1 − discount as a decimal). This is useful for double-checking whether an advertised "% off" actually matches the price tag.
How Stacked Discounts Actually Work
A common shopping mistake: two discounts don't simply add together.
| Discounts Applied | What People Assume | Actual Combined Discount |
|---|---|---|
| 20% + 10% | 30% off | 28% off |
| 25% + 15% | 40% off | 36.25% off |
| 30% + 20% | 50% off | 44% off |
| 50% + 50% | 100% off (free) | 75% off |
Each discount applies to the already-reduced price, not the original — which is why stacked discounts are always a bit smaller than they first appear.
Smart Shopping Tips
A few habits that help you spot the real deal.
✅ Spotting genuine deals
- Compare dollar savings, not just the percentage off
- Check the price history if possible — some "sales" inflate the original price first
- Watch for stacked discount codes at checkout, which compound rather than add
⚠️ Common mistakes
- Assuming two discounts add together instead of multiplying
- Forgetting that tax is usually calculated after the discount is applied
- Buying more just to "save more" on a percentage-based deal
Frequently Asked Questions
Common questions about discounts and sale prices.
Multiply the original price by the discount percentage (as a decimal) to get the discount amount, then subtract that from the original price to get the sale price.
Stacked discounts are usually applied one after another, not simply added together. For example, 20% off followed by an extra 10% off results in 28% total savings, not 30%, since the second discount applies to the already-reduced price.
Divide the sale price by (1 minus the discount as a decimal). For example, a $60 sale price after a 25% discount means the original price was $60 ÷ 0.75 = $80.
Not necessarily. A 50% discount on a cheap item may save less in absolute dollars than a 20% discount on an expensive one. It's worth comparing the actual dollar savings, not just the percentage.