Discount & Sale Price Calculator

Calculate retail sale prices, percentage discounts, sequential stacked coupons, and reverse original prices before sales markdowns.

Promotional Presets
$
units
Applied Discounts & Coupons
%
Quick Percentages
Final Payable Total
$80.00Save 20.0%
MSRP $100.00

Total Savings

$20.00

Effective %

20.0%

Per Unit Cost

$80.00

Quantity

1 units

Price Comparison Insight

You are paying $80.00 instead of full MSRP $100.00, keeping $20.00 in your pocket.

Zero Data Tracking

Your shopping prices and coupon comparisons are calculated 100% locally in your browser.

Discount Mathematics & Stacked Coupon Formulas

Discount calculations determine final consumer prices by extracting percentage or fixed dollar reductions:

1. Percentage Sale Price & Dollar Savings
Sale Price = Original Price ×
100 - Discount %100
2. Sequential Stacked Discount Effective Rate
Effective % = 1 - [ (1 - d₁/100) × (1 - d₂/100) × ... ]
3. Reverse Original Price Formula
Original Price =
Sale Price1 - (Discount % / 100)
Step-by-Step Discount Breakdown
Step 1: Determine Full Retail Base Price
Base Price: $100.00 × 1 unit(s) = $100.00 total retail.
Step 2: Apply Sequential Price Reductions
Total savings deducted = $20.00 (20.0% effective savings).
Step 3: Final Checkout Payable Amount
Payable Total=$80.00

Common Retail Discounts & Savings Table

Promotion TypeNominal DescriptionEffective % Off
Buy 1 Get 1 Free (BOGO)Pay for 1, receive 2 units50.0% Off Each
Buy 1 Get 1 50% OffSecond item at half price25.0% Off Total
Stacked 20% + 10% ExtraCoupon applied over sale price28.0% Off (Not 30%)
Buy 2 Get 1 FreePay for 2, receive 3 units33.3% Off Each

Frequently Asked Questions

How do I calculate a percentage discount?
To calculate a percentage discount, multiply the original price by the discount percentage, then divide by 100. Subtract this amount from the original price to get the final price. For example: $100 with 20% off = $100 - ($100 × 20 / 100) = $100 - $20 = $80.
How do stacked (compound) discounts work in retail?
Stacked discounts are applied sequentially, not added together. If you have 20% off and then an extra 10% off, the 10% is calculated on the already-discounted $80 subtotal ($80 - $8 = $72). The total effective discount is 28%, not 30%.
How do I reverse-calculate the original price from a sale price?
Divide the sale price by (1 - Discount%/100). For example, if a jacket is on sale for $75 after a 25% markdown: $75 ÷ (1 - 0.25) = $75 ÷ 0.75 = $100.00 original price.
What is price anchoring and how do retailers use it?
Price anchoring occurs when sellers set a high reference MSRP to make promotional discounts appear larger. Always check unit prices across competitors to confirm genuine savings.

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