Discount Calculator
Final price and savings after discount.
The Discount Calculator instantly shows you the sale price and total savings when a percentage or fixed discount is applied to any original price. Whether you're shopping for clothes, comparing Black Friday deals, or checking if a "50% off" sale is really worth it, this tool does the math in one step. Enter the original price and the discount, and you get the final price and the exact dollar amount saved. You can also work backwards โ enter the sale price and original price to find the hidden discount percentage.
See also: Percentage Pitfalls: Common Mistakes and How to Fix Them, Stacked Discounts: Why 30% + 20% Off Is Not 50% Off, Understanding Compound Interest (APR, APY, Compounding Frequency), Loan Repayment Methods: Equal Payment vs. Equal Principal ยท VAT Calculator, Percentage Calculator, Sales Tax.
When this calculator helps most
Use for a single promotion on a known list price, or to infer the effective percent off when you see original vs sale price.
What each input means
- Original price โ Sticker or list price before any promotion. (your currency)
- Discount (%) โ Single-step percentage off the original unless your UI stacks steps manually. (%)
- Sale price (reverse) โ When solving for implied discount %, pair with original price. (currency)
Input mistakes to avoid
- โขPercent off applies to original, not to an already-reduced intermediate unless the UI models stacks.
- โขFor โ$20 off,โ treat as fixed amount off, not a percent.
Discount Calculator
Formula
Examples
$200 Item with 30% Discount
A jacket originally priced at $200 is on sale for 30% off.
โ Sale price: $140, You save: $60
Black Friday $850 TV at 35% Off
Find the final price and savings on a TV marked down 35%.
โ Sale price: $552.50, You save: $297.50
Find Discount % from Two Prices
A $120 item is on sale for $84. What is the discount percentage?
โ 30% off ($36 savings)
Stacked Coupons: 20% Off + Extra 10% Off
Apply two sequential discounts to a $150 purchase.
โ After first discount: $120. After second discount: $108. Total saved: $42 (28% off)
How to read your results
- โOne-step percent off: final = original ร (1 โ discount/100); savings = original โ final.
- โMultiple promotions apply in sequence on the running price, not by adding percentages.
- โImplied discount % = (original โ sale) / original ร 100 when both prices are known.
What this result means
Final price is the arithmetic result of one clear discount rule โ receipt totals may still add tax or fees.
Common Pitfalls
- โ ๏ธAdding discount percentages that should be applied sequentially (e.g., 20% + 10% โ 30%).
- โ ๏ธApplying a second discount to the original price instead of the already-reduced price.
- โ ๏ธIgnoring that sales tax is often calculated on the discounted subtotal, not the list price.
Tips
- โCompare multiple discounts by calculating each to find the true best deal.
- โ"Stacked" percentage discounts multiply, not add โ always recalculate from the new price.
- โTo quickly estimate 20% off in your head: multiply by 0.8 (or take 10% and double it).
- โTo check if a sale is genuine, compare to the price on other sites before buying.
How to check your results
- โCheck: original โ savings = final price within rounding.
- โFor implied %, (original โ sale) / original ร 100 should match the displayed discount.
Warnings & Limitations
- โ ๏ธRetail โwasโ prices may be inflated; cross-check before assuming savings.
What this calculator does not tell you
- โStacked sequential discounts โ multiply (1 โ dโ)(1 โ dโ) on the running price instead of adding percents.
- โWhether tax is applied before or after coupon in your jurisdiction.
- โLoyalty points or cashback โ those are separate from the shelf discount.
Frequently Asked Questions
How do I calculate a discount?
Multiply the original price by the discount percentage to get the savings, then subtract from the original price. Formula: Sale Price = Original Price ร (1 โ Discount% / 100). Example: $100 with 25% off = $100 ร 0.75 = $75.
What if there are multiple discounts stacked?
Apply discounts sequentially, not additively. A 10% discount followed by another 10% discount is NOT 20% off โ it's 19% off total. After the first 10%: $100 โ $90. After the second 10%: $90 โ $81. Total savings: $19 (19%).
How do I find the original price from the discounted price?
Divide the sale price by (1 โ discount rate). Example: Sale price $75 at 25% off โ Original = $75 / (1 โ 0.25) = $75 / 0.75 = $100.
How do I calculate the discount percentage from two prices?
Discount % = ((Original Price โ Sale Price) / Original Price) ร 100. Example: Originally $80, now $60 โ ($80 โ $60) / $80 ร 100 = 25% off.
Is "50% off then 20% off" the same as 70% off?
No. Stacked percentage discounts multiply, they don't add. 50% off then 20% off = 1 โ (0.5 ร 0.8) = 1 โ 0.4 = 60% total discount, not 70%.
Does this calculator include sales tax on the discounted price?
This calculator shows the pre-tax discount and sale price. To calculate the final cost with tax, apply the tax to the discounted price. Use our Sales Tax Calculator for the combined result.
How do stores calculate "buy one get one 50% off"?
The discount applies to the cheaper item. If both items cost the same price, the effective discount across both items is 25% total. Example: two $50 items โ you pay $50 + $25 = $75 (25% off the combined $100).
Sources & References
Editorial & review note
Retail math is the editorial focus: stacked % off tags are multiplicative, and we repeat that in pitfalls because it is one of the most common checkout misunderstandings.
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Finance & MoneyRelated guides
Percentage Pitfalls: Common Mistakes and How to Fix Them
Wrong denominators, mixing โpercentโ with โpercentage points,โ and stacked discounts confuse even careful people. Here is how to spot the error and cross-check with our calculators.
Stacked Discounts: Why 30% + 20% Off Is Not 50% Off
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