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Open →Free Discount Calculator
Enter the original price and the percent off — see the discount, the sale price, and the final total with tax.
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You save
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Sale price
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Total with tax
100% free · No signup · Nothing is uploaded.
What is a discount calculator?
A discount calculator tells you what you actually pay after a percent-off sale. It shows the amount you save, the sale price, and — if you add your local sales tax — the true final total, so a '30% off' sign becomes a real number before you reach the checkout.
How to use the discount calculator
- Step 1: Enter the original (pre-sale) price.
- Step 2: Enter the discount percent from the sale tag.
- Step 3: Optionally add your sales tax percent to see the real checkout total.
Stacked discounts: the trap to watch
Two discounts in a row do not add up. '50% off, then an extra 20% off' is not 70% off: 100 becomes 50, then 20% off 50 is 40 — a 60% total saving. Retailers know most shoppers add the numbers in their head; running each stage through this calculator keeps the math honest.
Private by design
Everything runs in your browser with plain JavaScript. Nothing you enter is uploaded, stored or logged.
Frequently asked questions
Is this discount calculator free?
Yes — completely free, no signup, no limits.
How do I calculate 30% off 80?
30% of 80 is 24, so you pay 80 − 24 = 56. The calculator shows the saving and the sale price separately so you can check it at a glance.
Is sales tax applied before or after the discount?
In most US states, tax is charged on the discounted sale price — which is how this calculator works. A few states differ; check your receipt.
Can it handle stacked coupons?
Run the first discount, then enter the sale price as the original price with the second discount percent.
Does it work in any currency?
Yes — it only works with percentages and prices, so any currency works.
Short answer: A discount calculator tells you what you actually pay after a percent-off sale. It shows the amount you save, the sale price, and — if you add your local sales tax — the true final total, so a '30% off' sign becomes a real number before you reach the checkout.
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