Discount Calculator
Calculate sale prices, find discount percentages, or determine original prices. Supports double discounts and sales tax.
Sale Price
After all applied discounts
You Save
Effective Discount
Original Price
Tax Amount
No tax applied
| Discount | Sale Price | You Save | Multiplier |
|---|---|---|---|
| 10% off | $90.00 | $10.00 | × 0.90 |
| 15% off | $85.00 | $15.00 | × 0.85 |
| 20% off | $80.00 | $20.00 | × 0.80 |
| 25% off | $75.00 | $25.00 | × 0.75 |
| 30% off | $70.00 | $30.00 | × 0.70 |
| 40% off | $60.00 | $40.00 | × 0.60 |
| 50% off | $50.00 | $50.00 | × 0.50 |
| 60% off | $40.00 | $60.00 | × 0.40 |
| 75% off | $25.00 | $75.00 | × 0.25 |
Related Tools
Complete Guide to Calculating Discounts
How Discounts Work
A discount is a reduction from the original price, expressed as a percentage. To calculate a discounted price, multiply the original price by (1 − discount/100). For a 25% discount on $80: $80 × 0.75 = $60.
Stacked / Double Discounts
When two discounts are applied one after another (e.g., "20% off + extra 10% off"), they do not simply add up. A 20% + 10% stacked discount = 28% total, NOT 30%. This is because the second discount applies to the already-reduced price: $100 × 0.80 × 0.90 = $72, not $70.
Discount vs. Markup
A discount reduces price (customer perspective), while a markup increases cost to selling price (retailer perspective). A 50% markup on a $60 cost = $90 selling price, but a 50% discount on $90 = $45 — less than the original cost. They are not inverse operations.
Frequently Asked Questions
How much is 20% off $50?
$50 × 0.20 = $10 discount. Sale price = $50 − $10 = $40.00.
Is "buy one get one 50% off" the same as 25% off?
Yes! If both items are the same price, BOGO 50% = 25% off the total. But if items differ, the cheaper one should be the discounted item.
How do I find the original price from a sale price?
Divide the sale price by (1 − discount/100). If a shirt is $60 after 25% off: $60 ÷ 0.75 = $80 original price.