Discount Calculator
Calculate sale prices, find original prices, or batch calculate multiple items.
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Shopping during a sale? Use our Discount Calculator to verify pricing tags or plan your budget. Simply enter the original price and discount percentage to see exactly how much you'll pay and how much you save.
Our calculator supports 3 modes: Simple discounts with optional stacking, Reverse calculation to find original prices, and Batch mode for multiple items with different discounts.
With 6 currencies, sales tax support, and quick discount buttons—you'll always know the true "out the door" price.
Simple Discount
Calculate % off with optional stacked discounts.
Find Original Price
Reverse calculate what it cost before discount.
Batch Items
Calculate multiple items with different discounts.
Tax Included
Add sales tax to get the true final price.
Discount Formulas
Original × (Discount% ÷ 100)
$100 × 20% = $20 off
Original - Discount Amount
$100 - $20 = $80
Sale Price ÷ (1 - Discount%/100)
$80 ÷ 0.8 = $100 original
Apply each % sequentially
20% + 10% = 28% total (not 30%)
Common Discount Quick Reference
| Original | 10% Off | 20% Off | 25% Off | 50% Off |
|---|---|---|---|---|
| $50 | $45 | $40 | $37.50 | $25 |
| $100 | $90 | $80 | $75 | $50 |
| $200 | $180 | $160 | $150 | $100 |
Smart Shopping Tips
Stack coupons on sale items for maximum savings.
Check per-unit price on bulk deals to verify value.
Don't forget tax when budgeting for purchases.
Compare total cost not just discount percentage.
Watch Out For
Inflated "original" prices: Some stores raise prices before sales.
Exclusions: "Additional X% off" may exclude sale items.
Minimum purchase: Some discounts require minimum spend.
Frequently Asked Questions
How do I calculate a discount?
Discount Amount = Original Price × (Discount % ÷ 100). Final Price = Original Price - Discount Amount. Example: $100 with 20% off = $100 - $20 = $80 final price.
How do stacked/double discounts work?
Stacked discounts apply sequentially, not additively. 20% + 10% does NOT equal 30%. Instead: $100 - 20% = $80, then $80 - 10% = $72. Total discount is 28%, not 30%.
How do I find the original price before discount?
Use our Reverse mode. Formula: Original Price = Sale Price ÷ (1 - Discount% ÷ 100). Example: $80 sale price with 20% off means original was $80 ÷ 0.8 = $100.
Is sales tax applied before or after discount?
Tax is typically applied AFTER the discount. You pay tax on the discounted price, not the original. Our calculator applies tax to the price after all discounts.
How do I calculate 20% off?
Multiply the price by 0.20 to get the discount amount. Or multiply by 0.80 to get the sale price directly. Example: $50 × 0.20 = $10 off. $50 × 0.80 = $40 sale price.
What is BOGO (Buy One Get One)?
BOGO free = 50% off when buying 2. BOGO 50% off = 25% off per item when buying 2. Calculate total cost and divide by quantity to find effective per-item price.
How do I calculate discount percentage?
Discount % = ((Original - Sale Price) ÷ Original) × 100. Example: Original $100, sale $70. ($100 - $70) ÷ $100 × 100 = 30% discount.
What's the difference between 'percent off' and 'percent of'?
'20% off' means you save 20% (pay 80%). '20% of' means you pay only 20% (save 80%). These are opposites! '20% off' = '80% of the price.'
How do I calculate multiple item discounts?
Use our Batch mode. Enter each item with its price and individual discount. We calculate per-item and total savings, showing the final cart total.
Are coupons and discounts the same?
Coupons are often additional discounts on top of sale prices (stacked). A 20% off coupon on a 30% sale item gives you both discounts sequentially. Our calculator handles this.