Discount Calculator
Calculate how much you save during a sale. Works with percentage discounts and fixed amount discounts.
Last updated: January 2026
Discount Calculator
How to calculate a discount
To calculate the price after a percentage discount: multiply the original price by the discount percentage (as a decimal), then subtract that from the original price. For example, $100 at 20% off = $100 × 0.20 = $20 discount, so the sale price is $80.
A fixed amount discount is even simpler: just subtract the discount from the original price. Use the reverse mode to find what percentage discount a given dollar amount represents.
Smart shopping tips
Always calculate the final price, not just the discount amount. A 50% off sale on a $200 item saves you $100, but you still spend $100 — ask yourself if you would buy it at that price. Stackable discounts (e.g., 20% off + additional 10% off) are applied sequentially, not added together.