Discount / Sale Price Calculator
Find the sale price after a discount, or the discount percentage from a sale price.
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What is it?
This calculator finds the sale price after applying a percentage discount, or works backward from a known sale price to find out what discount percentage was applied.
Formula
Sale Price = Original Price × (1 − Discount% ÷ 100)
Discount % = (Original Price − Sale Price) ÷ Original Price × 100
Formula Explanation
The discount amount is calculated as a percentage of the original price, then subtracted to get the sale price. Working in reverse, if you know both the original and sale price, dividing the amount saved by the original price gives the discount percentage that was applied.
Example Calculation
An $80 item with a 25% discount saves you $20, bringing the price down to $60. Alternatively, if you see an item marked down from $80 to $60, that's a 25% discount.
How to Use
- Enter the original price.
- Choose whether you know the discount percentage or the final sale price.
- Enter that value.
- Read off the amount saved, discount percentage, and sale price.
Benefits
- Works in both directions — from discount to price, or from price back to discount.
- Instantly recalculates as you adjust any value.
- Useful for quickly verifying an advertised discount is accurate.
Use Cases
- Checking the real price during a sale before checkout.
- Verifying an advertised discount percentage matches the actual price drop.
- Comparing discounts across multiple items or stores on equal footing.
What Your Result Means
The sale price is what you'll actually pay after the discount is applied. The discount percentage is useful for comparing deals across different original prices — a $20 discount means very different things on a $40 item versus a $400 item.
Tips
- Compare discount percentages rather than dollar amounts saved when judging which deal is better across different-priced items.
- For multiple discounts applied one after another (like a sale plus a coupon), use a discount stacking calculator instead — they don't simply add together.
- Watch for discounts calculated on an inflated 'original' price — compare against the item's typical selling price when possible.
Common Mistakes
- Assuming a $20-off deal is always better than a 20%-off deal without checking the original price.
- Using this tool for multiple stacked discounts — successive discounts compound rather than add, so a dedicated stacking calculator is needed.
- Forgetting that tax is typically applied after the discount, not before.
FAQs
How do I find the discount percentage from two prices?
Switch to the 'Sale Price' mode, enter both the original and sale price, and the calculator will show you the exact discount percentage applied.
Does this include sales tax?
No, this calculator works with the pre-tax price — tax is typically calculated on the discounted price afterward, depending on local rules.
What if I have more than one discount to apply?
For multiple successive discounts (like a store sale plus a coupon code), use a discount stacking calculator instead, since combined discounts don't simply add together.
This tool calculates a single discount — for multiple stacked discounts applied one after another, the combined effect is different from simply adding the percentages.
Last updated: July 26, 2026