A discount percentage tells you how much comes off, but the number you care about is the one left on the tag. This calculator converts a percentage into real money.
Enter the original price and the discount — 25% off a $80 jacket leaves $60, for example — and you will see the savings, the reduced price, and the final total once any sales tax is applied to that lower figure.
Sales tax matters here: it is charged on the discounted price, not the original one, so a sale saves you a little on tax as well as on the item itself.
For informational purposes only — not financial advice.
How to use
- Enter the original price before any discount.
- Enter the discount percentage from the tag or promotion.
- Add your sales tax rate if you want the real checkout total, or leave it at zero to ignore tax.
- Press Compute to see the savings, the tax and the final price.
- Compare the final price against a competitor's price, not the headline discount.
Frequently asked questions
How do I calculate a discount?
Multiply the original price by the discount percentage and divide by 100 to get the savings, then subtract that from the original price. At 25% off, an $80 item saves $20 and costs $60.
Is sales tax charged before or after the discount?
After. Tax applies to the reduced price the customer actually pays, which is why a discount saves a small amount of tax as well as the discount itself.
What is the difference between 20% off and then a further 10% off?
They stack multiplicatively, not by addition. A $100 item at 20% off is $80, and a further 10% off that is $72 — not $70. Successive discounts always come off the already-reduced price.
How do I find the original price when I only know the sale price?
Divide the sale price by 1 minus the discount as a decimal. A $60 sale price at 25% off means 60 ÷ 0.75 = $80 as the original price.
Do buy-one-get-one offers work with a discount calculator?
Yes, if you convert them to a percentage first. Two-for-one is effectively 50% off when you buy two items; three-for-two is about 33% off. Enter the equivalent percentage here.
Should I use the discount percentage or the final price to compare deals?
Compare final prices, including tax and any shipping. A larger percentage off an inflated original price can still cost more than a smaller discount elsewhere, which is why the final figure is the honest comparison.