What does this tool do?
The Discount Calculator helps you work out the final price, your savings, and the discount percentage on a sale. With three modes you can find the discounted price, the percentage off, or the original price, making it ideal for anyone trying to do shop-window math in their head.
How to use it
- Enter your values into the fields.
- The result is calculated instantly.
- Read or copy the result.
Three calculation modes
The first mode finds the final price from an original price and a discount percent (e.g. $100 at 20% off = $80). The second mode takes the original and final price to calculate the discount percentage applied. The third mode works backward, finding the original price from a discounted price and percent, so a tag reading $80 at 20% off reveals a true price of $100. In every mode you can copy the headline result with one tap.
Savings and multiplier insight
Besides the final price, the results panel shows how much you save, the discount percentage applied, and a multiplier you can apply directly to a price (e.g. ×0.800 for 20% off). The multiplier is handy for pricing many items quickly: multiply each original price by it to get the sale price. It's perfect for comparing the real value of Black Friday, end-of-season, or coupon deals side by side.
Frequently asked questions
How do I find the original price from a discounted one?
Choose the third mode (Find original), enter the discounted final price and the discount percent, and the tool automatically calculates the pre-discount original price.
What is the multiplier value for?
The multiplier, when multiplied by the original price, gives the final price directly. For a 25% discount it's ×0.750, letting you scale many items without recalculating each one.
Is Discount Calculator free?
Yes. Discount Calculator and all 300+ tools on MagmaNex are completely free with no signup or account required.
Is my data safe?
Yes. Everything runs locally in your browser. The data you enter is never sent to a server, stored, or shared.
Does it work on mobile?
Yes. Discount Calculator works on phones, tablets and desktops — no app download needed.
🔒 Privacy: everything runs in your browser, your data is never sent to a server.