Reverse Percent Off Calculator
Know the original and sale price? Enter both to discover the exact discount percentage behind any deal.
Enter Both Prices
Works BackwardsDiscount Revealed
How It Works
Enter the original listed price in the first field and the sale or discounted price you paid in the second. The calculator works backwards to reveal the exact percentage discount.
It subtracts the sale price from the original, divides by the original, and multiplies by 100. The result tells you exactly how large the discount was, expressed as a percentage and dollar amount.
A deal quality rating helps you quickly assess whether the discount is minimal, decent, good, great, or exceptional. Use this to verify advertised discounts, compare deals, and negotiate with confidence.
What You See
- Discount Percentage: the exact rate by which the price was reduced
- Amount Saved: the dollar difference between original and sale price
- Deal Rating: a star based assessment of the discount quality
What Is the Formula?
Work backwards from two prices to reveal the hidden rate.
Subtract the sale price from the original to find how much was taken off in dollars.
Divide the difference by the original price and multiply by 100 to reveal the percentage.
Step by Step Worked Example
Scenario: A laptop originally listed at $1,200 is on sale for $840. What discount did the store apply?
The store applied a 30% discount, saving you $360. That earns a "Good deal" rating on the five star scale.
Hidden Discount Reference
| Original | Sale = 10% off | Sale = 20% off | Sale = 25% off | Sale = 30% off | Sale = 40% off | Sale = 50% off |
|---|---|---|---|---|---|---|
| $50 | $45.00 | $40.00 | $37.50 | $35.00 | $30.00 | $25.00 |
| $80 | $72.00 | $64.00 | $60.00 | $56.00 | $48.00 | $40.00 |
| $100 | $90.00 | $80.00 | $75.00 | $70.00 | $60.00 | $50.00 |
| $120 | $108.00 | $96.00 | $90.00 | $84.00 | $72.00 | $60.00 |
| $150 | $135.00 | $120.00 | $112.50 | $105.00 | $90.00 | $75.00 |
| $200 | $180.00 | $160.00 | $150.00 | $140.00 | $120.00 | $100.00 |
| $300 | $270.00 | $240.00 | $225.00 | $210.00 | $180.00 | $150.00 |
| $500 | $450.00 | $400.00 | $375.00 | $350.00 | $300.00 | $250.00 |
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