Percentage Off Calculator
Use this free percentage off calculator to find the discount percentage between an original price and a sale price. Enter both prices to instantly see what percent off the item is and how much you save in dollars.
Enter Values
The full price before any discount
The current discounted price
Result
Enter values above and click Calculate to see your result.
AI Assistant
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Formula
How it works: Subtract the sale price from the original price to get the dollar savings. Divide by the original price and multiply by 100 to convert to a percentage.
Review and Methodology
This calculator runs locally in your browser. Inputs are converted into the units required by the formula, and the result is paired with supporting references so you can verify the method before using it for planning or estimates.
Worked Example
How to Calculate Percentage Off
Knowing the percentage off helps you compare deals across different stores and price points. A $20 discount on a $200 item (10% off) is a very different deal than $20 off a $40 item (50% off). This calculator reverses the sale price formula to tell you the exact discount percentage.
- Percentage off lets you compare discounts on items at different price points
- Useful for verifying store-advertised discount claims
- If the sale price is higher than the original, the result will be negative (indicating a markup)
- Combine with the Tax and Discount Calculator to see your full checkout savings
Knowing the true percentage off empowers you to make better purchasing decisions and spot genuinely good deals versus misleading promotions.
You can also calculate changes using our Sale Price Calculator, Tax and Discount Calculator, Final Price Calculator or Percentage Calculator.
Frequently Asked Questions
Can the sale price be higher than the original?
Yes, but then the result will be negative, meaning the item has been marked up rather than discounted.
How do I calculate dollars saved?
Simply subtract the sale price from the original price. The dollar savings is shown alongside the percentage off in this calculator.
Is 20% off $50 the same as $10 off $50?
Yes. 20% of $50 is $10, so both discounts result in the same $40 sale price. This calculator helps you convert between the two.
How do I compare deals from different stores?
Calculate the percentage off for each store using this tool, then compare the percentages. A higher percentage off means a better relative deal, though you should also compare the absolute dollar savings.
How do I add this Percentage Off Calculator to my site?
Absolutely. Use the "Embed" option above to tailor the dimensions, color scheme, and styling to match your site. Copy the generated iframe snippet and drop it into your HTML, WordPress editor, or any CMS. There is no cost and no account required. See calculory.com/services/embed-calculators for a step-by-step walkthrough.
AI Assistant
Ask about this calculator
I can help you understand the percentage off calculator formula, interpret your results, and answer follow-up questions.
Try asking
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