Discount Calculator
Calculate the final price after applying a discount percentage.
Original price ($)
Discount (%)
You save
$20.00
Final price
$80.00
Original price
$100.00
How discounts work
A discount reduces the original price by a percentage. A 20% discount means you pay 80% of the original price.
Savings = Original × Discount% ÷ 100
Final price = Original × (1 − Discount% ÷ 100)Stacking discounts
A 20% discount followed by 10% off is not the same as 30% off. The second discount applies to the already-reduced price.
$100 with 20% off = $80
$80 with 10% off = $72 (saves $28, not $30)
Effective rate = 28%Common discount table
| Discount | You pay | Save on $100 | Markup to break even |
|---|---|---|---|
| 10% off | 90% | $10 | 11.1% |
| 20% off | 80% | $20 | 25% |
| 25% off | 75% | $25 | 33.3% |
| 30% off | 70% | $30 | 42.9% |
| 40% off | 60% | $40 | 66.7% |
| 50% off | 50% | $50 | 100% |
Tips for shoppers
- Compare net prices, not discount percentages. A 40%-off $90 item may cost more than a 10%-off $60 item.
- Watch for inflated “original” prices. Some retailers raise the price before discounting.
- Factor in shipping. A 20% discount offset by expensive shipping can be a worse deal than a slightly higher price with free delivery.
What this tool does
Calculates the final price after applying a percentage discount to the original price. Shows both the amount you save and the final price you pay.
Input fields explained
Original price
The full listed price before the discount is applied.
Discount
The discount percentage to apply. For a "30% off" sale, enter 30. Can also handle stacked discounts by calculating twice.
Formula / How it works
Final price = Original × (1 − discount%/100) You save = Original × discount%/100