Discount Calculator — Calculate Sale Price & Savings
Calculate sale prices, savings, and stacked discounts. Also supports reverse calculation and markup/margin. All calculations happen locally — nothing leaves your browser.
How to Use the Discount Calculator
- Select mode — find sale price, original price, markup, or margin.
- Enter values — input the original price and discount percentage.
- Stack discounts — add multiple discounts (e.g. 20% off + 10% member discount).
- Copy result — save the breakdown to your clipboard.
Understanding Discounts, Markup, and Margin
Discount is a reduction from the original price. Markup is the percentage added to cost to get the selling price. Margin is the percentage of the selling price that's profit. These are different ways of expressing price relationships.
Stacked discounts don't simply add up. A 20% discount followed by a 10% discount results in a 28% effective discount, not 30%.
Frequently Asked Questions
Each discount applies to the already-reduced price. For example, $100 with 20% off = $80, then 10% off $80 = $72. The effective discount is 28%, not 30%.
Markup is based on cost: (Price - Cost) / Cost. Margin is based on selling price: (Price - Cost) / Price. A 50% markup on $100 cost = $150 price, which is a 33% margin.
Use the "Find Original Price" mode. Enter the sale price and discount percentage. Formula: Original = Sale / (1 - Discount/100). For example, $75 at 25% off means original was $100.
Use Cases
Sale Price Calculation
Calculate final sale prices during shopping to determine how much you'll actually pay after discounts are applied.
Bulk Discount Analysis
Determine bulk discount savings when buying in quantity to see if larger orders provide meaningful cost reductions.
Promotion Comparison
Compare store promotions to determine which discount offer provides the best value for your purchase.
Stacked Discount Calculation
Figure out final price after multiple discounts are applied sequentially, understanding how they compound.
Big Purchase Budgeting
Plan budgets for big purchases by calculating expected savings and final costs before committing to buy.