Discount Calculator
Enter the original price and the discount percentage to see your savings.
How to Calculate Discount Prices
Calculating discounts is straightforward with our calculator, but understanding the math helps you spot deals quickly:
Basic Discount Formula
Final Price = Original Price - (Original Price × Discount Percentage) Step-by-step example: Item costs $80, discount is 25%
- Convert percentage to decimal: 25% = 0.25
- Calculate discount amount: $80 × 0.25 = $20
- Subtract from original: $80 - $20 = $60 final price
- You save: $20
💰 Quick Mental Math Trick: For 10% off, just move the decimal point left one place. For 20%, double that. Example: 10% off $45 = $4.50, so 20% off = $9.
Common Discount Percentages
Quick reference for popular discount levels on a $100 item:
| Discount | You Pay | You Save |
|---|---|---|
| 10% off | $90 | $10 |
| 15% off | $85 | $15 |
| 20% off | $80 | $20 |
| 25% off | $75 | $25 |
| 30% off | $70 | $30 |
| 40% off | $60 | $40 |
| 50% off | $50 | $50 |
| 75% off | $25 | $75 |
Multiple Discounts (Stacked Savings)
When stores offer "additional discounts" or coupon codes on sale items, they stack sequentially, not additively:
⚠️ Common Mistake: 20% off + 10% off ≠ 30% off!
Correct calculation for stacked discounts:
Example: $100 item with 20% off, then additional 10% off
- First discount: $100 × 0.20 = $20 off → New price: $80
- Second discount on $80: $80 × 0.10 = $8 off → Final price: $72
- Total savings: $28 (equivalent to 28% off, not 30%)
Shopping Tips
- Compare percentage vs fixed amount: $25 off works better than 20% off on items over $125
- Check for hidden costs: Big discount but high shipping? Calculate total cost
- Consider original pricing: 50% off an overpriced item might still be expensive
- Black Friday strategy: 40%+ discounts are common, wait for deeper sales
- Use price tracking: Ensure the "original price" isn't artificially inflated
Frequently Asked Questions
How do you calculate a discount? ▼
Multiply the original price by the discount percentage (as a decimal). This gives you the discount amount. Then subtract that from the original price to get the final price. Formula: Final Price = Original Price - (Original Price × Discount%). Example: $100 with 20% off = $100 - ($100 × 0.20) = $100 - $20 = $80.
What's 30% off $50? ▼
$50 with a 30% discount equals $35 final price. Calculation: $50 × 0.30 = $15 discount amount. $50 - $15 = $35. You save $15, paying $35 total.
How do you calculate what percentage off something is? ▼
Divide the discount amount by the original price, then multiply by 100 to get the percentage. Formula: (Discount Amount ÷ Original Price) × 100 = Discount%. Example: If you save $20 on a $100 item, that's (20 ÷ 100) × 100 = 20% off.
Can I calculate multiple or stacked discounts? ▼
Yes! When you have multiple discounts (like a sale item + coupon code), apply them sequentially, not by adding percentages. For example, 20% off then 10% off on $100: First 20% → $80, then 10% off $80 → $72 final (total of 28% off, not 30% off). Each subsequent discount applies to the new reduced price.
What's the difference between $10 off and 10% off? ▼
$10 off is a fixed dollar amount (always saves exactly $10, regardless of price). 10% off is proportional (saves more on expensive items, less on cheap ones). On a $100 item, both save $10. But on a $200 item: $10 off saves $10 (final $190), while 10% off saves $20 (final $180). For expensive purchases, percentage discounts usually save more.