Discount Calculator
Calculate sale prices, total savings, stacked double discounts, and final checkout costs including sales tax.
You save $39 (32.5% off)
How to Calculate Discounts
A discount represents a reduction in the standard price of an item or service. Calculating retail markdowns accurately ensures you know exactly how much you will pay at checkout and whether an advertised promotional sale is genuinely advantageous.
Single Discount Formula
Sale Price = Original Price × [1 - (Discount % ÷ 100)]Where:
- Sale Price = The reduced price before tax
- Original Price = The original regular price
- Discount % = The advertised markdown percentage
Note: Total dollar savings is calculated simply as Original Price minus Sale Price.
The Truth About Stacked Coupons & Double Discounts
Retailers often market "Take an extra 20% off already reduced 30% clearance items." Many consumers assume this equates to a 50% discount. In reality:
- On a $100 jacket with 30% off, the subtotal drops to $70 ($100 - $30).
- The extra 20% applies to the $70 subtotal, taking off another $14 ($70 × 0.20 = $14).
- The final pre-tax price is $56, representing a true effective discount of 44%, not 50%.
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Frequently Asked Questions
Common questions and clear answers about this calculator