Discount Calculator
Calculate the sale price after a discount, or find the discount percentage between original and sale prices. See also Markup Calculator and Percentage Calculator.
How to Calculate Discounts
To calculate a discount, multiply the original price by the discount percentage (as a decimal) to get the discount amount, then subtract it from the original price to get the sale price. For example, a 25% discount on a $200 item: $200 × 0.25 = $50 discount, so the sale price is $200 − $50 = $150. To find the discount percentage when you know both prices, divide the difference by the original price and multiply by 100.
Discount Formula
Discount Amount = Original Price × (Discount% / 100)
Sale Price = Original Price − Discount Amount
To find discount percentage:
Discount% = ((Original − Sale) / Original) × 100
Shortcut:
Sale Price = Original × (1 − Discount% / 100)
Example Calculation
Original Price: $200.00
Discount: 25%
Discount Amount = $200 × 0.25 = $50.00
Sale Price = $200 − $50 = $150.00
You save: $50.00
Discount Reference Table
| Original | 10% Off | 20% Off | 25% Off | 30% Off | 50% Off |
|---|---|---|---|---|---|
| $25 | $22.50 | $20.00 | $18.75 | $17.50 | $12.50 |
| $50 | $45.00 | $40.00 | $37.50 | $35.00 | $25.00 |
| $100 | $90.00 | $80.00 | $75.00 | $70.00 | $50.00 |
| $200 | $180.00 | $160.00 | $150.00 | $140.00 | $100.00 |
| $500 | $450.00 | $400.00 | $375.00 | $350.00 | $250.00 |
| $1,000 | $900.00 | $800.00 | $750.00 | $700.00 | $500.00 |
Frequently Asked Questions
How do I calculate a double discount?
For stacked discounts (e.g., 20% off then an additional 10% off), apply them sequentially. A $100 item at 20% off = $80, then 10% off $80 = $72. This is NOT the same as 30% off ($70). Stacked discounts always result in a smaller total discount than adding the percentages.
Is "buy one get one 50% off" the same as 25% off?
Yes, if you buy exactly two items at the same price. BOGO 50% off means you pay 150% for two items instead of 200%, which is a 25% discount on the total. However, if items have different prices, the actual discount varies.
How do I calculate the original price from a sale price?
Divide the sale price by (1 − discount/100). For example, if the sale price is $75 after a 25% discount: $75 / (1 − 0.25) = $75 / 0.75 = $100 original price.
Does this include sales tax?
No. This calculator shows the price after discount but before tax. In most jurisdictions, sales tax is applied to the discounted price, not the original price. Use a sales tax calculator to determine the final amount with tax.