Calculate sale prices, savings amounts and effective discounts. Supports stacked discounts for multiple coupon codes. Free online discount calculator.
What Is Discount Calculator?
A discount calculator shows the final price after applying a percentage or fixed-amount discount to the original price. It also shows how much money you save. While the maths is straightforward for a single discount, it gets more complex with stacked discounts (e.g. 20% off plus an additional 10% member discount), where the second discount applies to the already-reduced price rather than the original.
This tool handles single and stacked discounts, shows the savings amount and can calculate the original price if you know the discounted price and the discount percentage — useful for verifying that advertised "savings" are genuine.
How to Use This Tool
Enter the original price of the item.
Enter the discount percentage (e.g. 25%).
View the discounted price and the amount you save.
For stacked discounts, enter additional percentage discounts to see the cumulative effect.
Use the reverse calculator to find the original price from a sale price.
Tips & Best Practices
Stacked discounts of 20% + 10% do not equal 30% off — 20% then 10% gives 28% total discount.
Always check the original price before assuming a discount is a good deal — some retailers inflate pre-sale prices.
Compare the price per unit when products come in different sizes with different discount levels.
Sale prices must be the lowest price from the last 30 days under UK consumer law.
Common Use Cases
Calculating the final price of items during sales events like Black Friday.
Comparing discounts across different shops to find the best deal.
Verifying that stacked promotional discounts are applied correctly.
Working out the percentage discount when only the original and sale prices are shown.
Frequently Asked Questions
How do I calculate a percentage discount?
Enter the original price and discount percentage. The tool instantly shows the sale price and how much you save.
What are stacked discounts?
Stacked discounts apply multiple discounts in sequence. For example, 20% off then 10% off is not the same as 30% off. Premium users can calculate stacked discount totals.