Discount Calculator — % Off, Sale Price, Original Price
Three modes in one tool: calculate the sale price after % off, the discount % from sale vs original, or the original price from sale price + % off. Optional sales tax.
You pay
$80.00
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Browse all Finance Calculators →Catch the fake "50% off" tricks
Stores love to inflate the "original" price so the discount looks bigger. Use mode 2 to back-calculate the actual discount % when you know both prices, and mode 3 to check whether a discounted price still beats elsewhere on the original. Sales tax can be added optionally.
How to use the Discount Calculator
Takes about a minute. No signup, no download, your data stays in your browser.
- 1Open the tool. Scroll up to the Discount Calculator above — it loads instantly in your browser, no install needed.
- 2Enter your values. The fields come pre-filled with realistic defaults so you can see how it works — replace them with your own numbers.
- 3Read the result. The output updates instantly. Copy or share it — nothing is uploaded to a server, everything stays on your device.
Frequently asked questions
Common questions about the Discount Calculator.
How do I work out the final price after a percentage discount?
Enter the original price and the percentage off, and the tool shows the sale price and the amount you save. For example 25% off $80 gives a $20 saving and a $60 final price.
Can it find the original price from a discounted one?
Yes. If you know the sale price and the discount percentage, it can work backwards to the original price before the discount.
How do I figure out what percentage discount I got?
Provide the original and the final price and the calculator derives the percentage off, so you can check whether an advertised deal is really as big as it claims.
Does it handle stacked or successive discounts?
Successive discounts do not simply add up — 20% then 10% is not 30% off. Apply them one after another (take 20% off, then 10% off the new price) to get the true combined total.
Does it include sales tax?
The calculation is on the price before tax. Apply your local sales tax or GST to the discounted price afterward to get the amount you actually pay.
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