Discount Calculator
Calculate the final price after discount, saving amount, and percentage off. Works for single and multiple discounts.
Final Price
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you save
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total % off
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with tax
What is Discount Calculator?
A discount calculator finds the final price after one or more percentage discounts are applied to an original price. It also calculates the total amount saved and the effective percentage off. An optional tax field allows you to see the final price inclusive of sales tax or GST after the discount has been applied.
How to use
- 1 Enter the original price of the item.
- 2 Enter the primary discount percentage (e.g., 20 for 20% off).
- 3 Optionally enter a second discount if a stacked promotion applies (e.g., an extra 10% off sale items).
- 4 Optionally enter a tax or surcharge percentage to see the tax-inclusive final price.
- 5 Read the final price, total saving, effective percentage off, and tax-inclusive total.
Formula
Example calculation
A jacket priced at $150 with a 30% discount and an extra 10% member discount: after the first discount the price is $105, after the second it is $94.50. The total saving is $55.50, which is an effective 37% off the original price. With 10% tax, the final amount is $103.95.
Frequently asked questions
Are two stacked discounts the same as their sum?
No. A 30% discount followed by a 10% discount gives an effective 37% off, not 40%. Each discount is applied to the already-reduced price, so they multiply rather than add.
How do I find the original price if I only know the discounted price?
Divide the discounted price by (1 - discount rate). For example, if the sale price is $70 after a 30% discount, the original price is 70 / 0.70 = $100.
Does the tax apply before or after the discount?
In this calculator, tax is applied after all discounts. This reflects most retail scenarios where sales tax is calculated on the final selling price, not the original price.
What does effective percentage off mean?
When two discounts are stacked, the effective percentage off is the actual total reduction from the original price. It is always less than the sum of the two individual percentages because the second discount is calculated on an already-reduced amount.
Can I use this for calculating markup instead of discount?
Not directly. This calculator is designed for discounts (price reductions). For markup calculations — adding a percentage to a cost price to get a selling price — a separate percentage or markup calculator would be more appropriate.