What this calculation means
Implied markup measures the amount above cost relative to that cost. It works backward from a known cost and selling price.
This output is a rate, not a price multiplier or a margin percentage.
How to use this calculator
Enter a positive cost and the current selling price, using the same item and cost scope.
Formula and variables
Markup percentage = (Selling price − Cost) ÷ Cost × 100
- CostUSD
- Cost base. Must be greater than zero.
- Selling priceUSD
- Current selling price.
The percentage display uses one decimal place. Intermediate ratios retain their precision before the displayed result is rounded.
Understand your result
The result is the addition as a percentage of cost. A negative value means the price is below that cost base.
Worked example
Cost is $4.50 and selling price is $9.
Cost: 4.5 USD
Selling price: 9 USD
- The price exceeds cost by $9 − $4.50 = $4.50.
- Divide that difference by $4.50 cost and multiply by 100 = 100.0% markup.
Example result: 100.0%
Frequently asked questions
How do I turn a markup rate into a factor?
On the same cost basis, add 1 to the rate expressed as a decimal. A 100% rate is a factor of 2, not a factor of 100.
Can I enter zero cost?
No. Markup percentage divides by cost, so the cost base must be greater than zero.