🏷️ Discount Calculator MAIN TOOL
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How Do You Work It Out?
Sale price = original price × (1 − discount ÷ 100). A $120 item at 25% off costs $120 × 0.75 = $90, so you save $30. Two discounts stack by multiplying, not adding: 20% off and then an extra 10% off is 28% off in total, not 30%. Enter the price and discount above to see the result.
Quick Reference
| Price | Discount | Sale price | You save |
|---|---|---|---|
| 1,000 | 10% | 900 | 100 |
| 1,000 | 25% | 750 | 250 |
| 2,500 | 20% | 2,000 | 500 |
| 120 | 25% | 90 | 30 |
| 100 | 20% + 10% | 72 | 28 |
| 100 | 25% + 25% | 56.25 | 43.75 |
The Discount Formula
Sale Price = Original Price × (1 − Discount% ÷ 100), and Savings = Original Price − Sale Price.
Worked Example
A $120 item with a 25% discount: Sale Price = $120 × (1 − 0.25) = $90. You save $30.
Stacking Multiple Discounts
A common shopping mistake is assuming two discounts simply add together — a 20% off sale plus an extra 10% off does NOT equal 30% off. Discounts stack multiplicatively: apply the first discount, then apply the second to the already-discounted price. A $100 item with 20% off becomes $80, then an additional 10% off that $80 brings it to $72 — a combined discount of 28%, not 30%.
Comparing Discounts Across Stores
When comparing deals, always calculate the actual final sale price rather than just comparing the percentage — a 30% discount on a higher-priced item can still cost more than a 20% discount on a lower-priced item from a different retailer. Use this calculator on each option to compare real dollar amounts.
Another Stacking Example: Two Equal Discounts
Two 25% discounts stacked do not add up to 50% off. A $100 item with 25% off first becomes $75, then a further 25% off that $75 brings it to $56.25, a total discount of 43.75%, not 50%. The larger the individual discounts, the bigger this gap becomes, so always run each discount through the calculator in sequence rather than adding the percentages.
"Percent Off" vs. "Percent Of"
These two phrases are easy to confuse. "Percent off" means a reduction from a price, which is what this calculator computes. "Percent of" means a portion of a number, for example 25% of $100 is $25, which is a different calculation covered by our % of a Number Calculator.
Found the sale price and want the original? Use the reverse percentage calculator. Selling rather than buying? Check your margin with the markup vs margin calculator. See the percentage calculator hub for more.
How to Use the Discount Calculator
- Enter the original price.
- Enter the discount percentage.
- Add a second or third discount if the offer stacks (for example 20% off plus an extra 10%).
- Read the final price and the total amount you save.
Who Uses the Discount Calculator?
- Shoppers: check what a sale price really is before reaching the till.
- Stacked offers: see that 20% plus 10% off is 28% off in total, not 30%.
- Small sellers: set a sale price and know the exact markdown.
How the Discount Calculator Saves You Time
Working out a discount in your head in a shop is slow and stacked discounts are easy to get wrong. The answer here is instant and shows the total saving as well.
Frequently Asked Questions
How do I calculate a discounted price?
How much will I save on a discounted item?
Do two discounts stack by simply adding the percentages?
How do I compare discounts between two different stores?
Do two equal discounts, like 25% and 25%, add up to 50% off?
What's the difference between "percent off" and "percent of"?
Last updated: September 2026