Discount Calculator
Calculate sale prices, discount amounts, and total savings instantly. Compare multiple discounts side by side. Add sales tax to see the true final price.
You Save
$0.00
Sale Price
$0.00
After Tax
$0.00
Discount Comparison
Stacked Discounts
When you have a coupon ON TOP of a sale:
Combined effective discount: 28%
Final price: $71.99
Discount Calculator — Calculate Sale Prices & Savings Online Free: Calculate discount amounts and final prices instantly. Single and stacked discounts, tax calculation, savings tracker. Free online discount calculator.
How to Calculate Discounts
Enter Original Price
Type the item's original (pre-sale) price. This is the regular retail price before any discounts.
Set Discount
Enter the discount percentage or click a preset. Optionally add your local sales tax rate for the true out-of-pocket cost.
Compare & Stack
See savings at multiple discount levels. Use the stacked discounts section when you have a coupon on top of a sale price.
Understanding Discounts
A percentage discount reduces the original price by a calculated amount. The formula is simple: Discount Amount = Original Price × (Discount % ÷ 100). A 25% discount on a $100 item saves you $25, making the sale price $75. The savings feel straightforward for single discounts, but compound discounts require understanding how percentages stack.
Stacked discounts are common during major sales: "30% off everything PLUS an extra 15% with this coupon." Many shoppers assume 30% + 15% = 45% off. It doesn't. Stacked discounts apply sequentially: 30% off $100 = $70, then 15% off $70 = $59.50. The effective discount is 40.5%, not 45%. The formula is: Effective % = 1 − (1 − d₁/100)(1 − d₂/100). Our calculator handles this math automatically.
Sales tax is applied after the discount in most jurisdictions. A $100 item at 25% off with 8% tax: sale price = $75, tax = $6, total = $81. Some regions calculate tax on the original price (before discount) — check your local tax rules. Our calculator applies tax to the discounted price, which is the most common method.
The psychology of discounts is well-studied. Retailers know that "50% off" feels dramatically different from "$25.00 savings" even when they're identical on a $50 item. Percentage discounts feel larger for expensive items, while dollar-off discounts feel larger for cheap items. The "rule of 100" in marketing suggests: use percentages for items under $100, use dollars for items over $100.
Discount Tips
Compare Per Unit
A "buy 2 get 1 free" is 33% off per unit. "3 for $10" on $4 items is 17% off. Always calculate the per-unit price for bulk deals.
Stacking Math
20% + 10% ≠ 30%. It equals 28%. The order doesn't matter mathematically, but some retailers apply them differently. Check store policies.
Credit Card Cash Back
Don't forget credit card rewards. 5% cash back on a 25% sale effectively gives you 28.75% total savings. Stack every advantage.
Price Match
Many retailers price-match competitors. Find a lower price elsewhere, and you might get the discount without switching stores.
Frequently Asked Questions
Divide the savings by the original price and multiply by 100. Example: original $80, sale $60. Savings = $20. Percentage = ($20 ÷ $80) × 100 = 25% off. Use our Percentage Calculator tool for general percentage math.
They multiply (apply sequentially). 20% + 15% stacked: you keep 80% after the first discount, then 85% of that after the second. 0.80 × 0.85 = 0.68, so you pay 68% — a 32% effective discount, not 35%. The difference grows as the percentages increase.
In most US states and countries, sales tax is calculated on the actual selling price (after discount). If a $100 item is 25% off, tax applies to $75. Some regions vary — always check local tax regulations. Our calculator uses the standard (tax on discounted price) method.
It depends on the price. On a $80 item: 30% = $24 off (worse than $30 off). On a $120 item: 30% = $36 off (better than $30 off). The breakeven is $100 — 30% of $100 = $30. Always calculate the actual dollar amount to compare.