Discount Calculator - Find the Real Price
Whether it is Black Friday, a store coupon, or a membership discount, this calculator shows the final price after any discount - plus the amount saved, the effective tax, and a comparison of stacked discounts.
How Discounts Work
Worked Example: $120 Item at 30% Off
- Original: $120
- Discount: 30%
- You save: $36
- Final price: $84
Stacked Discounts: Warning
Retailers often advertise "extra 20% off already-reduced items." Stacked discounts do NOT simply add - they multiply:
- Original: $100
- First 30% off โ $70
- Then extra 20% off โ $56
- Total discount: 44%, not 50%
Common Discount Types
| Type | Typical Value |
|---|---|
| Storewide sale | 10-30% |
| Seasonal (Black Friday) | 20-50% |
| Clearance | 40-70% |
| Coupon stacking | 5-20% extra |
| Membership discount | 5-15% |
| Cashback | 1-5% |
| Reward points | 1-5% |
Is It Actually a Deal?
- Check price history on CamelCamelCamel or Honey
- Compare to competitors before buying
- Watch for "always on sale" pricing tricks
- Beware of inflated MSRPs
- Calculate shipping and tax into the final cost
- Loyalty programs often offset the discount
Frequently Asked Questions
How do I calculate a discount?
Multiply the original price by (1 - discount%). $100 at 25% off = $100 ร 0.75 = $75.
How do I calculate the original price?
Divide the final price by (1 - discount%). $75 after 25% off = $75 รท 0.75 = $100.
Do stacked discounts add or multiply?
Multiply. 30% + 20% = 44% total, not 50%.
How do I find the best deal?
Compare the final out-the-door price including shipping and tax across retailers.
Are Black Friday deals real?
Some are. Many "deals" are inflated MSRPs. Always compare to normal prices.
How does sales tax affect the discount?
Sales tax is applied after the discount. A $100 item at 20% off with 8% tax = $80 ร 1.08 = $86.40.