Calculate discounts, sale prices, and savings
A discount reduces the original price of an item by a certain percentage or fixed amount. Understanding how discounts work helps you compare deals, calculate savings, and make informed purchasing decisions. This calculator handles both percentage-based and fixed-amount discounts.
Sale Price = Original Price × (1 - Discount Percentage / 100)
| Calculation | Expression | Result |
|---|---|---|
| 20% off $100 | $100 - 20% | $80.00 |
| 30% off $250 | $250 - 30% | $175.00 |
| 15% off $50 | $50 - 15% | $42.50 |
| $25 off $100 | $100 - $25 | $75.00 |
| With 8% tax | $80 + 8% tax | $86.40 |
Multiply the original price by the discount percentage, then divide by 100 to get the savings. Subtract from the original price for the sale price. For example, 25% off $80: Savings = $80 × 0.25 = $20, Sale Price = $80 - $20 = $60
Divide the sale price by (1 - discount percentage / 100). For example, if an item is $75 after a 25% discount: Original = $75 / 0.75 = $100
Apply discounts sequentially, not by adding percentages. For example, 20% off then 10% off: First discount: $100 × 0.80 = $80. Second discount: $80 × 0.90 = $72. This is NOT the same as 30% off ($70).
It depends on the original price. Calculate both to compare. For example, on a $50 item: 20% off saves $10, while $15 off saves $15. On a $100 item: 20% off saves $20, while $15 off still saves $15. Higher-priced items often benefit more from percentage discounts.
Apply the discount first, then calculate tax on the sale price. For example, $100 item with 20% discount and 8% tax: Sale price = $80. Tax = $80 × 0.08 = $6.40. Total = $86.40
BOGO 50% off saves 25% on the total purchase if you buy two items. If each item is $40, you pay $40 + $20 = $60 for $80 worth of products, saving $20 or 25% overall.