Discount Calculator – Calculate Sale Price & Savings
Instantly find the sale price, amount saved, and percentage off for any discount. Perfect for shopping, pricing, and deal comparisons.
Results
Enter values and click Calculate to see results
Enter the original price
Type the regular price before any discount. For $49.99, enter "49.99". The calculator works with any currency.
Input the discount percentage
Enter the discount as a whole number. For 25% off, enter "25". For half off, enter "50".
View your savings and final price
Instantly see the sale price, amount saved, and a visual breakdown. Use the reference table to compare common discount percentages.
Calculating discounts is straightforward once you know the formula. To find the discount amount: multiply the original price by the discount percentage (as a decimal). To find the sale price: subtract the discount from the original price.
Discount Formulas
Discount Amount = Original Price × (Discount % / 100)
Sale Price = Original Price - Discount Amount
Or directly: Sale Price = Original Price × (1 - Discount % / 100)
Example: $100 item with 25% off. Discount = $100 × 0.25 = $25. Sale price = $100 - $25 = $75. Or directly: $100 × 0.75 = $75.
| Discount | You Pay | You Save | On $100 | On $50 |
|---|---|---|---|---|
| 5% | 95% | 5% | $95 ($5 off) | $47.50 ($2.50 off) |
| 10% | 90% | 10% | $90 ($10 off) | $45 ($5 off) |
| 15% | 85% | 15% | $85 ($15 off) | $42.50 ($7.50 off) |
| 20% | 80% | 20% | $80 ($20 off) | $40 ($10 off) |
| 25% | 75% | 25% | $75 ($25 off) | $37.50 ($12.50 off) |
| 30% | 70% | 30% | $70 ($30 off) | $35 ($15 off) |
| 40% | 60% | 40% | $60 ($40 off) | $30 ($20 off) |
| 50% | 50% | 50% | $50 ($50 off) | $25 ($25 off) |
| 75% | 25% | 75% | $25 ($75 off) | $12.50 ($37.50 off) |
Stores often advertise "extra 20% off sale items" or "take an additional 15% off." These stack multiplicatively, not additively. A 50% off item with an extra 20% off isn't 70% off – it's 60% off total.
Example: Stacking 50% + 20%
Original price: $100
After 50% off: $100 × 0.50 = $50
Extra 20% off: $50 × 0.80 = $40
Total discount: 60% (not 70%)
Formula for stacked discounts: Final Price = Original × (1 - Discount₁) × (1 - Discount₂) × ... For three discounts of 30%, 20%, and 10%: $100 × 0.70 × 0.80 × 0.90 = $50.40 (49.6% total discount, not 60%).
How do I calculate the discount percentage if I know both prices?
Divide the discount amount by the original price, multiply by 100. Original $80, sale $60: discount = $20, percentage = (20/80) × 100 = 25%. Or use: ((Original - Sale) / Original) × 100.
Is a bigger discount always better?
Not necessarily. 50% off a $20 item saves $10. 30% off a $100 item saves $30. Always calculate the actual dollar savings. Also consider: do you need it? A "bargain" you don't use is 100% wasted.
How do I calculate tax on a discounted price?
Tax is calculated on the sale price, not the original. $100 item, 20% off, 8% tax: Sale price = $80. Tax = $80 × 0.08 = $6.40. Total = $86.40. Never calculate tax before applying the discount.
What does "up to 70% off" mean?
It means some items are 70% off, but many are less. Retailers use this to attract you with the maximum discount while most items might only be 20-40% off. Check individual item discounts, not just the headline.
Are "buy one get one free" deals actually 50% off?
Mathematically, yes – if you need two items. But if you only needed one, you spent 100% more than planned. BOGO is 50% off per item only if you use both. Otherwise, it's full price for something extra you may not need.
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