Sale price, savings & profit margin — 100% free, runs in your browser
For shoppers this shows what you actually pay. For sellers it does something more useful — enter your cost price and it reveals whether the discount still leaves a profit. Many small businesses discount into a loss without realising, because they calculate margin on the original price rather than the discounted one.
Margin should be measured against the selling price, not the cost. A product bought at 100 and sold at 150 has a 33 percent margin, not 50.
Work backwards from the margin you need to keep. This tool shows profit at each discount level, so you can find your floor before announcing a sale.
Not directly here. Apply the first, take the result as the new original price, then apply the second — stacked discounts multiply rather than add.