Known values pin any two
$
$
%
%
Pin and enter any two of cost, selling price, margin, or markup. The other two derive live. Margin % and markup % are always shown side by side for both directions.
Derived figures no pair selected
Cost
—
cost price
Selling price
—
what the buyer pays
Gross profit
—
price − cost
Margin
—
profit ÷ price
Markup
—
profit ÷ cost
—
Enter and pin any two of cost, selling price, margin, or markup — the rest derive live, with $ profit, margin % and markup % shown for both directions.
Both directions profit ÷ cost vs profit ÷ price
Markup · profit / cost
—
Markup expresses profit as a percentage of what you invested in the goods (cost).
→ margin on price: —
Margin · profit / price
—
Margin expresses profit as a percentage of what the buyer pays (selling price).
→ markup on cost: —
Conversions any known pair
| Known pair | Derives | Formulas |
|---|
Notes interpretation
MARGINMargin = profit ÷ selling price × 100. It cannot reach 100% with a positive cost — profit can never equal or exceed the price you collect.
MARKUPMarkup = profit ÷ cost × 100. Unlike margin, markup can exceed 100% and compare profit against what you paid, not what you charge.