Stacking Discounts
Double discounts multiply, not add. 30% off + 20% off = 44% total discount (0.70 × 0.80 = 0.56), not 50% off.
Calculate the sale price after a percentage discount. Enter the original price and discount percentage to see your savings, final price, and cost breakdown. Supports additional tax calculation and double discounts.
A discount reduces the price of an item by a percentage of its original cost. A 25% discount on a $89.99 item saves you $22.50, bringing the price down to $67.49.
Understanding discount math prevents common shopping mistakes. A "50% off + additional 20% off" is NOT 70% off — it's 60% off. The second discount applies to the already-reduced price.
This calculator also handles sales tax, so you can see the true final price including both the discount and applicable taxes.
Double discounts multiply, not add. 30% off + 20% off = 44% total discount (0.70 × 0.80 = 0.56), not 50% off.
Always calculate the per-unit cost when comparing "buy more, save more" deals. Sometimes the "deal" isn't actually cheaper per unit.
Black Friday (30-50% off), end-of-season (40-70%), and holiday sales typically offer the deepest genuine discounts.
The most common type. "25% off" means the price is reduced by one quarter of the original amount.
"$10 off" coupons. Better for cheap items (more % saved), worse for expensive items (smaller % impact).
Buy One Get One deals. "BOGO 50% off" = 25% off each item. "BOGO free" = 50% off each item.
Larger quantities at lower per-unit prices. Common in B2B: "10% off orders over $500."
Reduced pricing for buying early. Hotels, flights, and events often offer 10-30% off for advance purchases.
Identity-based discounts typically 10-20%. Always ask — many retailers offer these but don't advertise them.
Click to try.
$199.99 shoes at 40% off.
$49.99 case, 15% off + 8.25% tax.
$1,299 laptop at 20% off.
$24.99 book at 50% off.
Multiply the original price by the discount percentage, then subtract. For 25% off $80: $80 × 0.25 = $20 savings, $80 - $20 = $60 sale price.
Multiply the complements: 30% off + 20% off = (1-0.30) × (1-0.20) = 0.70 × 0.80 = 0.56, so you pay 56% (44% total discount, not 50%).
In most jurisdictions, sales tax is calculated AFTER the discount. You pay tax on the sale price, not the original price. This calculator handles this correctly.
It depends on the price. Below $100, $10 off is better. Above $100, 10% off is better. At exactly $100, they're equal. Always calculate both.
Divide the sale price by (1 - discount/100). If sale price is $60 at 25% off: $60 ÷ 0.75 = $80 original price.
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