Why the two numbers get confused
Both are percentages of the same profit, measured against different bases. Margin uses the selling price and markup uses the cost. Because the base differs, a target stated in one cannot be used directly as the other. Treating a 30% margin goal as a 30% markup leaves you with a 23.08% margin on every sale.
Accountants and financial reports usually speak in margin, while buyers and estimators often think in markup. If you work between the two groups, this conversion is where pricing errors tend to slip in.
The formulas
Margin to markup
Markup % = Margin % ÷ (100 − Margin %) × 100
Markup to margin
Margin % = Markup % ÷ (100 + Markup %) × 100
Price multiplier
Multiplier = 1 + Markup % ÷ 100
Worked example
A retailer wants a 30% margin and needs to know what markup to apply.
- Markup: 30 ÷ (100 − 30) × 100 = 42.86%.
- Multiplier: 1 + 0.4286 = 1.4286×.
- On a $100 cost, the price is $142.86.
Check: the $42.86 profit divided by the $142.86 price is 30%, which is the margin the retailer wanted.
How to use the multiplier
The multiplier saves you from repeating the calculation. Once you know your target, multiply any cost by that figure to get its price. It is simple to put into a spreadsheet column or a product import file, and it stays correct for every item at that margin.
Frequently asked questions
What markup gives a 50% margin?
A 100% markup. Doubling the cost means half of the selling price is profit.
What margin does a 100% markup give?
A 50% margin. The two numbers are the same relationship seen from opposite sides.
Why does the calculator reject a 100% margin?
A 100% margin means the cost is zero. As a margin approaches 100%, the needed markup grows without limit, so there is no finite answer to show.
Does this conversion depend on my actual prices?
No. The relationship holds for any cost and price. The dollar figures only come in when you apply the multiplier to a specific cost.