Discount Calculator
Calculate the sale price and amount saved after a percentage discount, or work out the discount percent from original and final prices — 100% in your browser, no upload.
Sale price after a discount
Final price: 80You save: 20
Find the discount %
Discount: 20%
🔒 Calculated in your browser — nothing is uploaded. Plain numbers, no currency.
Calculate discounts both ways
Enter an original price and a discount percentage to instantly see the final sale price and the amount you save. Everything updates as you type. The tool uses plain numbers, so it works with any currency — just read the result in whatever units you entered.
Find the discount percentage
Already know the original and the sale price? The second section works backwards: type both prices and it shows the exact discount percent between them. Results are rounded to two decimals for readability while the underlying math stays precise.
Frequently asked questions
How is the final price calculated?
Final price = original price − (original price × discount ÷ 100). The amount saved is simply original price × discount ÷ 100.
How do I find the discount percentage from two prices?
Use the second section. Discount % = (original − final) ÷ original × 100. If the original price is zero the percentage is undefined, so the tool shows a short notice instead.
Is anything uploaded to a server?
No. All calculations run entirely in your browser using JavaScript. Nothing you type is sent anywhere or stored.