Discount Calculator
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By Mark Williams, CFAReviewed by Dr. Sarah Chen, MBA (Finance)Published: Updated:
References
- [1]Federal Trade Commission, Federal Trade Commission - Advertising FAQ: Deceptive Pricing. https://www.ftc.gov/tips-advice/business-center/guidance/advertising-faqs
- [2]Investopedia, Investopedia - Discount Definition and Types. https://www.investopedia.com/terms/d/discount.asp
- [3]Wiley, Pricing and Profitability Management: A Practical Guide for Business Leaders, 2020.
How to Use?
- 1
Choose what to calculate
Select Final Price, Original Price, or Discount Percentage from the mode dropdown. The form adjusts to show only the fields you need.
- 2
Enter the price information
Type the price or prices requested. For the Discount field, use the inline unit toggle to switch between % (percentage off) and Fixed (fixed amount off), then enter the discount value.
- 3
Add a stacked discount (optional)
If you have a second coupon or promotion that applies after the first discount, enter it in the Additional Discount field.
- 4
Enter sales tax (optional)
Add your local tax rate to see the tax amount and the final out-the-door total including tax.
- 5
Click Calculate and review the results
The primary result shows prominently. The savings donut chart shows the percentage saved visually in green. The Savings Percentage value confirms the effective rate regardless of which mode you used.
- 6
Switch modes to explore different scenarios
Use Original Price mode to find the list price from a sale price. Use Discount Percentage mode to find the rate when you know both prices.
- 7
Compare multiple offers
Run different discount configurations through the calculator and compare the final price and total with tax to find the best deal.
Worked Examples
120% Off a $150 Winter Jacket
Given Values
Calculate:finalPrice
Original Price:150
Discount:20
Additional Discount (optional):0
Sales Tax Rate (optional):0
Results
Final Price:120
You Save:30
Savings Percentage:20
2$25 Fixed Coupon on an $80 Purchase
Given Values
Calculate:finalPrice
Original Price:80
Discount:25
Additional Discount (optional):0
Sales Tax Rate (optional):0
Results
Final Price:55
You Save:25
Savings Percentage:31.3
3Chain Discount: 30% + 15% Off Clearance
Given Values
Calculate:finalPrice
Original Price:200
Discount:30
Additional Discount (optional):15
Sales Tax Rate (optional):0
Results
Final Price:119
You Save:81
Savings Percentage:40.5
4Finding the Original Price From a Sale
Given Values
Calculate:originalPrice
Sale Price:68
Discount:15
Additional Discount (optional):0
Sales Tax Rate (optional):0
Results
Original Price:80
Final Price:68
You Save:12
Savings Percentage:15
5$200 Item at 25% Off With 8% Sales Tax
Given Values
Calculate:finalPrice
Original Price:200
Discount:25
Additional Discount (optional):0
Sales Tax Rate (optional):8
Results
Final Price:150
You Save:50
Savings Percentage:25
Tax Amount:12
Total (with tax):162
6Finding the Discount Percentage
Given Values
Calculate:discountPercent
Original Price:120
Sale Price:90
Additional Discount (optional):0
Sales Tax Rate (optional):0
Results
Final Price:90
You Save:30
Savings Percentage:25
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Frequently Asked Questions
Multiply the original price by the discount percentage divided by 100, then subtract that result from the original price. For a $100 item at 20% off: discount = $100 x 0.20 = $20, final price = $100 - $20 = $80. Or use the shortcut: multiply the original price by (1 - discount/100), so $100 x 0.80 = $80. This calculator does both steps instantly in Final Price mode.
Subtract the sale price from the original price to get the savings amount, then divide by the original price and multiply by 100. For an item that was $80 and is now $60: savings = $20, discount percentage = ($20 / $80) x 100 = 25%. Use the Discount Percentage mode in this calculator to get the result instantly.
Divide the sale price by (1 - discount percentage / 100). If an item is on sale for $68 after a 15% discount: original price = $68 / (1 - 0.15) = $68 / 0.85 = $80. Use the Original Price mode in this calculator to avoid the manual division.
Stacked discounts apply sequentially, not additively. The second discount applies to the already-reduced price from the first discount. On a $100 item: 20% off gives $80, then 10% off the $80 gives $72. The total savings is $28, which is 28% off, not 30%. The second 10% discount is 10% of $80 ($8), not 10% of $100 ($10). Always calculate stacked discounts in the correct order using the multiplicative method.
A percentage discount scales with the original price: 20% off a $50 item saves $10, while 20% off a $500 item saves $100. A fixed-amount discount gives the same dollar savings regardless of price: $20 off saves $20 whether the item costs $50 or $500. Percentage discounts favor higher-priced items, while fixed discounts benefit lower-priced items more in percentage terms. Use the discount type selector in this calculator to compare both options.
In nearly all jurisdictions, sales tax applies to the final discounted price, not the original price. A $100 item at 20% off with 8% tax: discounted price is $80, tax is $6.40 (8% of $80), total is $86.40. Applying tax before the discount would give $108 minus $20 = $88, which overstates the total. This calculator applies tax after the discount automatically.
A trade discount is a reduction offered by a manufacturer to a wholesaler, distributor, or retailer rather than to the end consumer. Trade discounts are typically quoted as percentage reductions from the list price and may involve multiple tiers (e.g., 40/20/10, where each discount applies sequentially). Retail discounts go directly to the consumer. The calculation method is the same, but trade discounts affect inventory cost accounting rather than the final shelf price.
For a standard BOGO (buy one, get one free), you pay for one item and get the second free. The effective discount is 50% off each item when you buy two. For buy two, get one free: you pay for two and get one free, which is 33.3% effective discount. For buy one, get one 50% off: you pay full price for the first and half price for the second, making the effective discount 25%. Use the discount percentage mode with the combined prices to verify the effective rate.
A discount is typically a temporary reduction in price for promotions, sales, or specific customer segments (coupons, loyalty discounts). A markdown is a permanent price reduction usually made to clear inventory, phase out a product line, or match competitor pricing. Both use the same calculation formula, but the business intent and accounting treatment differ. Discounts are recorded as selling expenses; markdowns reduce the carrying value of inventory.
False reference pricing occurs when a retailer inflates the original price to make the discount look larger than it really is. An item listed at $200 marked down to $100 appears to be 50% off, but if the item never sold for $200, the discount is misleading. Check the item’s price history using a price tracker or compare across multiple retailers. The Federal Trade Commission’s Guides Against Deceptive Pricing (16 CFR Part 233) prohibit this practice. Always verify the original price is genuine before celebrating the deal.
Bulk discounts reduce the per-unit price as the order quantity increases. A supplier might offer 5% off for orders of 50 to 100 units, 10% off for 101 to 500 units, and 15% off for 501 or more units. The discount applies to the total order value. To calculate the savings, multiply the base price by the applicable discount percentage. For tiered discounts, the highest tier that the order qualifies for applies to the entire order, not just the portion above the threshold.
Seasonal discounts happen at predictable times of the year tied to shopping seasons, holidays, or weather changes. They typically range from 15% to 50% off and are designed to boost traffic during specific periods. Clearance discounts happen at the end of a product’s lifecycle and typically start at 30% to 40% off, deepening to 60% to 80% off as the remaining stock is sold. Clearance discounts are permanent reductions meant to eliminate inventory, while seasonal discounts are temporary promotions.
Stacking policies vary by retailer. Some stores allow unlimited stacking, others allow only one discount per transaction, and many online retailers automatically apply the best single discount available. When stacking is allowed, the typical order is: store-wide sale first, then manufacturer coupon, then loyalty discount, then cashback. Each discount after the first applies to the progressively reduced price. This calculator’s Additional Discount field handles the most common two-tier stacking scenario.
A discount reduces the price from the original to a lower sale price. A markup increases the cost to arrive at a higher selling price. They are not interchangeable: a 25% markup on $100 cost gives $125 selling price, but a 25% discount on $125 gives $93.75, not $100. The discount applies to a larger base number (selling price) while the markup applies to a smaller base number (cost). This asymmetry is important for business owners calculating promotional impact on margins.
Cash discounts incentivize early payment on invoices. The most common terms are 2/10 net 30, which means the buyer can deduct 2% from the invoice total if payment is made within 10 days instead of the standard 30 days. For a $10,000 invoice with 2/10 net 30 terms: paying within 10 days saves $200, making the payment $9,800. The effective annualized return for taking the discount is roughly 36%, making it one of the best investments a business can make. Use the discount percentage mode to calculate the effective savings rate.
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