Use this Discount Calculator to find a sale price, reverse the effective discount from a final price, stack multiple percentage discounts correctly, add a fixed coupon, or solve for the discount needed to hit a target price. The tool works with any currency because discount arithmetic is independent of exchange rates.
Discount Calculator
PROCompare two offers
Compare two discount offers against the same original price. Each offer can use a percentage discount plus an optional fixed coupon.
Discount breakdown at a glance
This visual updates from the calculator above and shows the price reduction as a simple cut from the original price to the final price.
Current offer: $100.00 original price - $20.00 savings = $80.00 final price.
How discount math works
A percentage discount changes the price by a proportion of the original amount. A fixed coupon changes it by a specific currency amount. When both apply, order matters. This calculator applies percentage discounts first and the fixed coupon afterward so the calculation stays explicit.
Step-by-step guide
Use Sale price for a normal percentage discount, Reverse discount when you already know the final price, Stack discounts for multiple promotions, or Target price to find the discount required to reach a desired price.
Use the price before discounts. If you are comparing multiple items, quantity multiplies both total cost and total savings.
For this calculator, percentage discounts are applied sequentially, then the fixed coupon is subtracted. Retailer-specific coupon rules can differ.
A smaller percentage plus a fixed coupon can beat a larger percentage-only offer. Use the comparison section to see which deal produces the lower final price.
Why 20% off plus 10% off is not 30% off
Stacked percentage discounts apply one after another. A $100 item discounted by 20% becomes $80. Applying another 10% removes $8, producing a $72 final price. The total savings are $28, so the effective discount is 28%, not 30%. This is one of the most common discount-calculation mistakes.
Percentage discount vs fixed coupon
A percentage discount scales with price, while a fixed coupon always removes the same currency amount until the price reaches zero. For expensive items, the percentage may be stronger; for cheaper items, a fixed coupon can be better. The Compare two offers section is designed for exactly this decision.
If the purchase will later have sales tax added, keep the discount calculation separate from tax. For U.S. purchases use the U.S. Sales Tax Calculator; for VAT/GST systems use the VAT Calculator. Discount and tax order can depend on jurisdiction and coupon type.
Discount vs markup and margin
A discount reduces a selling price. Markup and margin describe the relationship between cost and selling price, so they answer different questions. Sellers can use the Markup Calculator or Profit Margin Calculator to see whether a promotion still leaves enough room above cost.
Cases this calculator does not fully model
Stores can prohibit coupon stacking, cap savings, exclude brands or require minimum purchase amounts. The calculator performs the math you enter; it does not validate a retailer's promotion terms.
Cashback and loyalty rewards can arrive later or have redemption conditions, so they are not treated as an immediate price discount here.
The final price in this tool is the discounted merchandise price. Shipping, service fees and tax remain separate unless they are already included in your entered price.
BOGO, tiered quantity pricing and mixed-item bundles need offer-specific logic and should not be reduced to a single percentage unless you know the effective price.
Common mistakes
Frequently asked questions
How do I calculate 25% off a price?
Multiply the original price by 25% to get the savings, then subtract the savings from the original price. Equivalently, multiply the original price by 0.75.
How do stacked discounts work?
Each percentage is applied to the price left after the previous discount. They are not normally added together.
How do I find the original discount percentage from the final price?
Subtract final price from original price, divide by original price, then multiply by 100.
Can I compare a percentage coupon with a fixed coupon?
Yes. The comparison section accepts a percentage and fixed coupon for each offer and shows which produces the lower final price.
Does this include sales tax?
No. It calculates the discounted price before separate taxes or fees. Use the U.S. Sales Tax Calculator or VAT Calculator afterward when appropriate.
Sources
- Numeros calculation methodology. Percentage, fixed-coupon, reverse-discount, target-price and sequential-discount results are direct arithmetic from the visitor's inputs. No external rate or retailer data is required.
- NIST. SI Units - Math - general percentage and decimal arithmetic conventions.
Related calculators
Continue through the Business Calculators hub, or use these related tools:
- U.S. Sales Tax Calculator - add U.S. state/local tax after a discount.
- VAT Calculator - apply VAT/GST-style tax outside the U.S.
- Markup Calculator - set selling price from cost and markup.
- Profit Margin Calculator - measure margin before or after a promotion.
- Break-Even Point Calculator - estimate sales volume needed at a discounted price.
- Commission Calculator - calculate commission on discounted sales.
- Net Profit Calculator - evaluate overall profit after expenses.
- Percentage Calculator - handle general percentage calculations.