Discount Calculator
Work out sale prices and how much you save.
Use on any page (bookmarklet)
Want Discount Calculator without leaving the page you're on? Drag the button below to your bookmarks bar, then click it on any website to open Discount Calculator right there — it runs entirely in your browser.
Use responsibly: a bookmarklet runs on whatever page you click it on. Avoid sensitive sites such as online banking, payment, or healthcare pages — you run it at your own risk. Everything is processed locally and no data is sent anywhere. See our Terms.
- Show your bookmarks bar if it's hidden — Ctrl+Shift+B (⌘+Shift+B on Mac).
- Drag the button above onto the bookmarks bar.
- Open any website and click the bookmark — the Discount Calculator panel appears in the top-right corner. Use ✛ to move it between corners, or ›/‹ to tuck it against the edge and pull it back out.
- Click the bookmark again (or the ✕) to close it.
Note: a few sites with strict security policies may block bookmarklets.
Examples
25% off 80
Input
Price 80, 25% off
Output
You save 20 · Final price 60
15% off 49.99
Input
Price 49.99, 15% off
Output
You save 7.5 · Final price 42.49
About this tool
This free online discount calculator works out the sale price and how much you save. Enter the original price and the discount percentage, and the amount saved and final price update instantly. Everything runs in your browser with no upload.
How to use
- Enter the original price.
- Enter the discount percentage.
- Read your savings and the final price below.
Common uses
Checking sale prices while shopping, comparing deals, working out clearance and coupon savings, and pricing products with a markdown.
Frequently asked questions
How do I calculate a discount?
Multiply the original price by the discount percentage and divide by 100 to get the amount saved, then subtract that from the original price for the final price. This calculator does it instantly as you type.
Is this discount calculator free?
Yes — it's a completely free online discount and sale price calculator with no sign-up.
What is 25% off of 80?
25% of 80 is 20, so you save 20 and the final price is 60.
Does it work with any currency?
Yes. It works with plain numbers, so the result applies to any currency — just read the values in your own currency.
Can it handle decimals?
Yes. Enter prices and percentages with decimals and the savings and final price are shown to two decimal places.
Is my data uploaded anywhere?
No. The calculation runs entirely in your browser with no upload.
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