Calculate Final Price
Enter original price and discount percentage to find sale price.
Find Original Price
Enter sale price and discount percentage to find original price.
Find Discount Percentage
Enter original price and sale price to find discount percentage.
Discount Calculation Results
Additional Discounts
Understanding Discounts: How to Calculate Savings
Discounts are a fundamental part of shopping, but understanding exactly how much you're saving requires proper calculation. This guide explains the different types of discounts and how to calculate them accurately.
Basic Discount Formulas
1. Finding Final Price:
Final Price = Original Price × (1 - Discount Percentage ÷ 100)
Example: $100 with 20% off = $100 × (1 - 0.20) = $80
2. Finding Original Price:
Original Price = Sale Price ÷ (1 - Discount Percentage ÷ 100)
Example: $80 with 20% off = $80 ÷ (1 - 0.20) = $100
3. Finding Discount Percentage:
Discount % = (1 - Sale Price ÷ Original Price) × 100
Example: $80 from $100 = (1 - 0.80) × 100 = 20%
Types of Discounts
| Discount Type | How It Works | Example |
|---|---|---|
| Percentage Off | Reduces price by a percentage | 20% off $100 = $80 |
| Fixed Amount | Reduces price by fixed amount | $20 off $100 = $80 |
| Buy One Get One (BOGO) | Free or discounted additional item | Buy 1 get 1 50% off |
| Bulk Discount | Discount for buying multiple items | 3 for $25 (normally $10 each) |
| Cashback | Money back after purchase | 10% cashback on $100 = $90 net |
Stacking Discounts: How to Calculate Multiple Discounts
When you have multiple discounts (like a store sale plus a coupon), you should apply them sequentially, not add them together. Here's the correct way:
Final Price = Original Price × (1 - Discount1) × (1 - Discount2) × (1 - Discount3)...
Example: $100 with 20% off, then 10% off = $100 × 0.80 × 0.90 = $72
Wrong way: 20% + 10% = 30% off = $70 (incorrect!)