Discount Calculator
Calculate sale prices and see how much you save
Enter values to see results
Fill in the form and click Calculate
How to Use This Calculator
Enter the original price and discount percentage to see the sale price. Optionally add your local sales tax rate to see the final price including tax. Quick discount buttons make it easy to check common sale percentages.
Discount Calculation Formula
Discount Amount = Original Price × (Discount % ÷ 100)
Sale Price = Original Price - Discount Amount
Example Calculation
For an item originally priced at $80 with a 25% discount:
- Discount Amount: $80 × 0.25 = $20
- Sale Price: $80 - $20 = $60
- With 8% tax: $60 × 1.08 = $64.80
Frequently Asked Questions
How do I calculate a discount?
To calculate a discount, multiply the original price by the discount percentage divided by 100, then subtract from the original price. For example, 25% off $100 = $100 - ($100 × 0.25) = $75.
How do I calculate the original price from a sale price?
To find the original price, divide the sale price by (1 - discount percentage/100). For example, if something costs $75 after 25% off: $75 ÷ 0.75 = $100 original price.
Is sales tax calculated before or after the discount?
Sales tax is calculated on the discounted price, not the original price. This means you save on tax too when items are on sale.
How do I calculate multiple discounts?
For stacked discounts (like 20% off then 10% off), apply each discount sequentially. This is NOT the same as adding them together. 20% off then 10% off = 28% total, not 30%.