Calculate sale prices, savings, BOGO deals, and stacked discounts
Our Percent Off Calculator handles three common discount scenarios in one tool: simple percent-off calculations, BOGO (Buy One Get One) deals with various discount levels, and stacked discounts where multiple percentages are applied sequentially. It's the ultimate tool for comparison shopping.
Understanding percent-off discounts is essential for savvy shopping and effective retail promotions. Whether you're comparing Black Friday deals, calculating savings from a coupon, or setting up a store-wide sale, knowing exactly how much you'll save — or how much your customer will pay — prevents costly mistakes.
BOGO deals are particularly popular in retail because they create a sense of urgency and can move more inventory. Our calculator breaks down the per-item cost of different BOGO structures so you can see which deal truly offers the best value. Stacked discounts are common during clearance events where store-wide and category-specific promotions overlap.
For a simple percent off, the discount amount is the original price times the percentage. For stacked discounts, each discount is applied sequentially to the previous result.
Stacked discounts are applied one after another, not added together. For example, a 20% off followed by an additional 10% off results in a 28% total savings, not 30%. Each discount is calculated on the progressively lower price.
When buying two items, BOGO Free is equivalent to 50% off each item. However, BOGO deals typically require purchasing two items, whereas a 50% off sale might apply to a single item. The per-item cost is the same in both scenarios.
For BOGO Free, the effective discount is 50% (pay for 1, get 1 free = 50% off total). For BOGO 50% Off, the effective discount is 25% (pay 1.5 × price for 2 items). For BOGO 25% Off, the effective discount is 12.5%.
Retailers use stacked discounts to create layered promotions — for example, a store-wide 20% off sale plus an additional 10% off for loyalty members. This rewards specific customer segments without giving the full combined discount to everyone.
Percent off uses a percentage (e.g., 25% off), while fraction off uses a fraction (e.g., 1/4 off). They are mathematically equivalent — 25% off is the same as 1/4 off. Some retailers use fractions because they feel more intuitive to shoppers.