Reverse Discount Calculator – Find the Original Price Before Discount
Already know the discounted price but not the original price? Enter the final price and the discount percentage to instantly reverse-calculate the original price, discount amount, and effective discount rate.
This reverse discount calculator helps you find the original price before a discount was applied. Simply enter the price you paid (or the sale price) and the discount percentage to see what the item originally cost.
How Reverse Discount Calculation Works
- Start with the final (discounted) price you paid or see on the tag.
- Identify the discount percentage that was applied (e.g., 20%).
- Divide the final price by (1 minus the discount percentage as a decimal).
- The result is the original price before the discount was applied.
Reverse Discount Formula
Original Price = Final Price ÷ (1 − Discount Percentage ÷ 100)
Example Calculation
If the final price is $80 after a 20% discount: Original Price = $80 ÷ (1 − 0.20) = $80 ÷ 0.80 = $100. The original price was $100, and you saved $20.
Common Use Cases
- Verifying sale prices — confirm that the advertised "original price" matches the discount percentage and sale price shown.
- Checking original retail prices — find out what an item cost before a clearance or promotional discount was applied.
- Understanding discount depth — see exactly how much was taken off and whether the deal is as good as it seems.
Reverse Discount Calculator FAQ
What is a reverse discount calculator?
A reverse discount calculator works backwards from the sale price to find the original price. You enter the discounted price and the discount percentage, and it calculates what the item cost before the discount was applied.
How do I calculate the original price before discount?
Divide the final price by (1 minus the discount percentage as a decimal). For example, if you paid $75 after a 25% discount: $75 ÷ (1 − 0.25) = $75 ÷ 0.75 = $100. The original price was $100.
Can I reverse a percentage discount?
Yes. As long as you know the final price and the discount percentage, you can reverse-calculate the original price using the formula: Original Price = Final Price ÷ (1 − Discount % ÷ 100).
How do I use an original price calculator?
Enter the sale price in the Final Price field and the discount percentage in the Discount Percentage field. The calculator instantly shows the original price, the discount amount, and the effective discount rate.
Looking for a general discount calculator? AI discount calculator
Want to apply a discount instead of reversing one? apply a percentage discount