How to use the Discount Calculator
Enter the original price and discount and the result appears straight away. Everything runs in your browser, so nothing you type is uploaded.
How to find the discount
To find the discount amount from the original price, multiply the original price by the discount percentage and divide by 100. A 20% discount on $65 is $13, so the discounted price is $52. A 50% discount simply halves the price. To skip a step, multiply by what is left: 20% off means you pay 80%, so 65 × 0.8 = $52.
Types of discounts
Discounts come as a percentage off, a fixed amount off, such as $10 off orders over $50, or deals like buy one get one free. A fixed amount saves more on cheap items, while a percentage saves more on expensive ones. In most US states, sales tax is charged on the sale price after a store discount, so your savings amount grows a little once tax is added.
The formula
savings = price × discount ÷ 100; final = price − savings
Examples
- 20% off $100
Final price: 80 You save: 20
- 30% off $85
Final price: 59.5 You save: 25.5
- 15% off $249
Final price: 211.65 You save: 37.35
Limitations and assumptions
Results are estimates for general information. Check assumptions and inputs before relying on them.
Frequently asked questions
How do I calculate a discount?
Multiply the price by the percent off and divide by 100 for the savings, then subtract it from the price.
How do stacked discounts work?
Each applies to the already reduced price, so 20% then 10% off equals 28% off, not 30%.
Is the discount calculated before or after tax?
Usually before tax, which is then charged on the lower price.
How can I find the original price from a sale price?
Divide the sale price by one minus the discount rate. A price of $80 after 20% off was $100.