Discount Calculator
Calculate the sale price, original price, discount percentage, or amount saved. Choose the row that matches the two values you already know.
Use the row that matches the two values you know. Fields marked with * are required; underlined values are calculated automatically.
Original price + discount percentage
Final price + discount percentage
Original price + final price
Discount amount + discount percentage
Calculate with confidence
Clear formulas, practical results, and the right calculation for the price you have.
Four-way discount calculation
Original price, discount percentage, amount saved, and final price are linked. Enter the required pair in any of the four common scenarios to calculate the other two values.
Calculate or reverse a discount
Check a sale price before buying, find the original price from a receipt, calculate the advertised percent off, or work backward from the amount saved.
See all four values
Each result shows the complete price breakdown, so you can verify the original price, percentage discount, savings, and final price together.
How to use the discount calculator
Use the calculator in three quick steps.
Step 1
Choose the row whose two required fields match the values you already know.
Step 2
Enter both required numbers. The two underlined results update automatically as you type.
Step 3
Review all four values, clear one scenario, or reset the page to restore the default examples.
Frequently asked questions
Answers to common calculation and tax-rate questions.
How do I calculate the price after a discount?
Multiply the original price by 1 minus the discount rate as a decimal. For 20% off 100, calculate 100 × 0.80 = 80.
How do I find the original price before a discount?
Divide the final price by 1 minus the discount rate as a decimal. If an item costs 80 after 20% off, 80 ÷ 0.80 = 100.
How do I calculate the discount percentage?
Subtract the final price from the original price, divide the saving by the original price, then multiply by 100.
How do I calculate the amount saved?
Subtract the final price from the original price, or multiply the original price by the discount percentage divided by 100.
Does the calculator include sales tax?
No. It calculates the merchandise discount only. Use the sales tax calculator afterward when tax applies to the discounted selling price.
Can the final price be zero?
Yes. A 100% discount produces a final price of zero. Some reverse calculations cannot determine a unique original price from a zero final price and 100% discount.
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