Discount Calculator
Calculate sale prices, discount amounts, and savings for single or stacked discounts with tax options.
100% client-side
No signup
Free forever
$0.00
You Save
$0.00
Final Price
Quick Discounts
Discount Comparison Table
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How to Use Discount Calculator
How to Use the Discount Calculator
- Enter original price: Type the full, pre-discount price of the item.
- Enter discount: Input the discount as a percentage (e.g., 25 for 25% off).
- Optional - Add more discounts: If you have multiple coupons, add additional discount percentages.
- Optional - Add sales tax: Enter your local tax rate to see the final out-of-pocket cost.
- View results: See the discount amount, sale price, and total savings.
Quick Discount Mental Math
- 10% off: Move decimal one place left ($80 → $8 off = $72)
- 25% off: Divide by 4 ($80 → $20 off = $60)
- 33% off: Divide by 3 ($90 → $30 off = $60)
- 50% off: Divide by 2 ($80 → $40 off = $40)
- 75% off: Find 25% and that's what you pay
Features
- Calculate percentage discounts instantly
- Multiple/stacked discount support
- Calculate savings amount
- Sales tax inclusion option
- Reverse discount calculator
- Compare multiple deals
- Currency formatting
- Common discount quick buttons
- Original vs. sale price display
- Mobile-friendly for shopping
- No registration required
- Works offline
About Discount Calculator
Shopping smart means understanding exactly how discounts affect final prices. Our Discount Calculator cuts through retail math complexity, computing savings whether you're dealing with simple markdowns or stacked promotional offers.
Discount Calculations
- Single Discount: Original price minus percentage off
- Discount Amount: How much money you save in absolute terms
- Stacked Discounts: Multiple sequential discounts (e.g., 20% off then additional 10%)
- Price Before Discount: Reverse calculate original from sale price
- With Tax: Final price including sales tax after discount
Stacked Discount Math
A common misconception: 20% off plus 10% off equals 30% off. Actually, stacked discounts multiply—after 20% off, the second 10% applies to the already-reduced price. The combined effect is 28% off (1 - 0.8 × 0.9 = 0.28). Our calculator handles this correctly while showing the actual savings.
Comparison Shopping
Is "$50 off" better than "25% off"? It depends on the original price. At $200, they're equal. Above $200, the percentage saves more; below, the fixed amount wins. Our calculator helps you quickly compare offers to maximize savings.
Frequently Asked Questions
How do I calculate a discount percentage?
To find the sale price: Original Price × (1 - Discount%/100). For 25% off $80: $80 × 0.75 = $60. Or calculate discount amount first: $80 × 0.25 = $20 off, then $80 - $20 = $60. Our calculator shows both the discount amount and final price instantly.
How do I find the original price before discount?
If you know the sale price and discount percentage: Original = Sale Price ÷ (1 - Discount%/100). For a $60 item that's 25% off: $60 ÷ 0.75 = $80 original. This reverse calculation helps verify deals or calculate pre-discount values.
How do stacked discounts work?
Multiple discounts don't simply add up. A 20% discount then 10% more isn't 30% off. Calculate sequentially: $100 × 0.80 = $80, then $80 × 0.90 = $72. That's actually 28% total discount. Our calculator handles stacked discounts correctly and shows the effective percentage.
Which is better: percentage off or fixed amount off?
It depends on the price. $20 off vs 20% off: below $100, take $20 off; above $100, take 20% off; at exactly $100, they're equal. Our tool compares both types so you can choose the better deal when stores offer options.
How do I calculate price per unit with bulk discounts?
Divide total discounted price by quantity. Example: Buy 3 for $25 (normally $10 each): $25 ÷ 3 = $8.33 per unit (17% savings). Our calculator compares unit prices across different quantity deals to show the true best value, accounting for any minimum purchase requirements.
How do I add tax after a discount?
Tax applies to the discounted price, not original. Calculate discount first, then add tax. $100 item, 20% off, 8% tax: $100 × 0.80 = $80, then $80 × 1.08 = $86.40 final. Our calculator can include tax calculations to show your actual out-of-pocket cost.