How is sale price calculated?

Sale price = original × (1 − discount / 100). For 30% off $80: 80 × 0.7 = $56.

Discount Calculator

Compute sale price, savings and effective discount.

Runs in your browser

Enter the original price and the discount percentage. We show the sale price, your savings and the effective discount, in real time.

Original price

Discount %

Sale price

$56.00

You save

$24.00

Effective discount

30.0%

How to use it

Enter the original price
The sticker price before any discount.
Enter the discount %
The percentage off advertised by the seller.
Read the sale price
Sale price and savings appear instantly. The effective discount confirms what % you actually saved.

What is it?

A discount calculator takes an original price and a percentage off, and returns the sale price plus how much you save. The arithmetic is trivial but it's the one calculation people do at the till on a phone in a hurry - having it pre-built saves seconds and mistakes.

When to use it

Black Friday / Boxing Day shopping, comparing two offers (15% off vs $X off), confirming a quoted sale price matches the sticker, and back-of-envelope checks when negotiating any priced service.

Common mistakes

Stacking discounts additively (a 20% then 10% discount is not 30% off - it's 28%). Forgetting taxes - the displayed sale price often does not include sales tax / VAT. And mixing 'X% off' with 'X off' (a $20 discount vs a 20% discount).