Discount Calculator

Understanding how discounts are calculated can empower you to be a smarter shopper. The basic principle involves reducing the original price by a certain percentage or a fixed amount. For a percentage discount, the key is to convert the percentage into a decimal (by dividing by 100) and multiplying that by the original price. This gives you the monetary value of the saving, which you then subtract from the original price to find your final cost.

Things get more interesting with stacked discounts, a common promotional tactic. This is where a second discount is applied after the first one has already reduced the price. A crucial point to recognise is that the second discount applies to the new, lower price, not the original price. For instance, if a £100 item is first reduced by 20% (to £80), a subsequent 10% discount is calculated on the £80, not the £100. This results in an £8 saving, bringing the final price to £72, not £70. This calculator correctly sequences these calculations for you.

This tool also allows for reverse calculations, a useful feature for analysing past purchases or understanding the value of a sale. By inputting the original and final prices, you can determine the exact discount percentage you received. This helps in comparing different offers and recognising the true value of a 'good deal'. It is a practical way to analyse your spending and verify that the savings you received were as advertised.