Discount Calculator
Calculate sale prices, savings amounts, and final costs after discounts and tax
Discount Details
Quick Examples
Enter Price & Discount
Fill in the original price, discount percentage, and optionally tax rate to see your savings and final cost.
Your Savings
Price Breakdown
How we calculated this
What if?
Each row recalculates with your current inputs. Tap a row to apply it.
Compare two plans
About the Discount Calculator
What Is a Discount?
A discount is a reduction in the selling price of a product or service. Stores use discounts to attract customers, clear inventory, or promote seasonal sales. Understanding the true savings helps you make smarter purchasing decisions.
Types of Discounts
Common discount types include percentage-off (e.g., 20% off), fixed-amount-off (e.g., $10 off), buy-one-get-one (BOGO), and stacked discounts (combining multiple offers). This calculator handles percentage-based and stacked discounts.
Smart Shopping Tips
Always compare the discounted price across retailers — a "50% off" deal is only a bargain if the original price was fair. Factor in taxes and shipping to get the true cost. Stacking smaller discounts can sometimes beat a single larger discount.
Discount Calculator FAQ
How do stacked discounts work?
Stacked discounts are applied sequentially, not added together. For example, 20% off plus an extra 10% off means the second discount is applied to the already-reduced price, so the total savings are 28% — not 30%.
Should I calculate tax before or after the discount?
In most jurisdictions, sales tax is applied to the discounted (sale) price, not the original price. Our calculator follows this convention and applies tax after all discounts have been deducted.
How do I know if a sale price is actually a good deal?
Compare the sale price to the typical selling price at other retailers, not just the listed "original price." Some stores inflate original prices to make discounts look bigger. Use price-tracking tools and our calculator to verify real savings.
How do I work out the discount percentage from the prices alone?
Divide the sale price by the list price, subtract from 1, and multiply by 100: a $68 item listed at $80 gives 1 − (68 ÷ 80) = 15% off. This reverse calculation is how you audit a "30% off everything" claim in one step.
How do I spot an inflated "original" price?
Compare the per-unit price (per ounce, per liter) against other stores and against the item's typical street price over the past 90 days rather than the tag's crossed-out number. Pricing regulations in many jurisdictions require the reference price to be genuine, but a crossed-out number alone proves nothing.
Why is 20% off twice not 40% off?
Successive discounts multiply: after the first 20% you pay 80%, after the second you pay 80% × 80% = 64%, which is 36% off. Three stacked 20% discounts come to 48.8% off, not 60% — the calculator applies multiplicative stacking automatically.
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