Discount Calculator
The Discount Calculator shows the sale price after a percentage discount and exactly how much you save. Enter the original price and the discount percentage to instantly see the amount off and the final price you will pay at the till.
How a discount works
A discount is a percentage cut from the original price. The amount you save is that percentage of the original, and the price you pay is whatever is left. Knowing both numbers helps you judge whether a sale is really as good as the sign claims.
The formula
Saving = Original × Discount% ÷ 100. Final price = Original − Saving. Equivalently, the final price is Original × (1 − Discount% ÷ 100).
A worked example
A jacket priced at 2,500 is marked 30% off. The saving is 2500 × 30 ÷ 100 = 750 and the final price is 1,750. If a second, separate 10% coupon then applies to that reduced price, it comes off the 1,750, not the original, giving another 175 saved. Stacked discounts always apply one after another, never added together.
Spot the real bargain
A big percentage off a padded price is not always a deal, so compare the final price against what you would normally pay elsewhere. For multiple items, work out the price per unit to compare fairly. And watch for two discounts advertised as one large number: 20% then 20% is not 40% off, it is 36%.
How to use
- Enter your details in the fields above. The Discount Calculator accepts everyday values and checks them as you type.
- Press the action button (or just start typing for live tools) to run the calculation.
- Read your result, along with any supporting figures, in the clearly labelled result box.
- Use Copy result to grab the answer, Reset to start again, or Copy link to share this tool.
Why use this tool
Finance Wave built the Discount Calculator to be genuinely useful: it validates your input so you never see a broken result, formats numbers for your region automatically, and stays readable in both light and dark mode. Because everything happens on your device, it is private by design and keeps working even without an internet connection once the page has loaded.