Percentage Off Calculator
Whether you're shopping during Black Friday, calculating trade discounts, or figuring out a negotiated invoice reduction, instantly see exactly how much you save and what your final price will be.
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How Percentages Work in Sales
Retailers use percentage discounts constantly to attract customers. While seeing "25% Off!" might sound appealing, doing the mental maths on a specific price tag can be difficult, especially if the price isn't a round number. Our percentage off calculator does the heavy lifting for you.
The Basic Formula
If you want to manually calculate how much you are saving on an item, the formula is straightforward:
For example, if a TV costs £450 and is 15% off:
Savings = 450 × 0.15 = £67.50
Final Price = 450 - 67.50 = £382.50
Double Discounts (Stacked Sales)
Often during events like Boxing Day sales, a store might offer "20% off already reduced clearance items". If the clearance item was already 30% off, you are not getting 50% off overall.
You must calculate the first 30% discount. Then, you take the remaining price, and calculate the 20% discount on that new amount. This means the actual total discount is less than the perceived 50%.