Discount Calculator
Find the sale price and how much you save. e.g. “What is 30% off a $120 item?”
Enter your values
Results update as you type. All calculation happens in your browser.
Methodology
Find the sale price and how much you save. This tool uses a standard, documented formula and runs entirely on your device.
Last reviewed January 2026 · Runs client-side
Working out a sale price and your savings
A percentage discount reduces a price by a share of its original value. The calculation is simple, but it's easy to misjudge in your head, especially with stacked or unusual percentages, which is where a quick check helps before you commit to a purchase.
Seeing both the amount saved and the final price side by side makes it easier to compare deals. A larger percentage off a higher price isn't always the better saving in absolute terms.
How to use this calculator
- Enter the original price.
- Enter the discount percentage.
- Read the amount saved and the final price you'll pay.
What the inputs mean
- Original price
- The price before any discount.
- Discount
- The percentage reduction being applied.
30% off a $120 item saves you $36, bringing the price down to $84.
The formula, in plain terms
Sale price = Price × (1 − Discount% / 100). The saving is the original price minus the sale price.
Good to know
- Stacked discounts multiply, they don't add, 20% then 10% off is 28% off, not 30%.
- Compare the money saved, not just the headline percentage.
Frequently asked questions
How do I reverse a discount?
If you know the sale price and the percentage off, divide the sale price by (1 − discount/100) to recover the original, see the reverse percentage calculator.
Last reviewed January 2026. This explainer is general information, not professional advice.