Markup Calculator accuracy and testing

Formula source

• The formula for Selling Price based on Markup is: **Selling Price = Cost × (1 + Markup%)** For example, if cost is $100 and markup is 25%, Price = $100 × 1.25 = $125.

Test cases

Known limitations

• This page documents the checked-in calculator logic and does not certify results for every real-world edge case.
• Use the result as a planning estimate unless the calculator page states a stricter purpose.

Assumptions

• This calculator applies a single markup percentage to the entered cost.
• The result is a pre-tax selling price; shipping, sales tax, and channel fees must be handled separately if needed.
• Markup values at or below -100% create a zero or negative selling price and are treated as invalid.

Unit handling

• Cost accepts values in $.
• Markup Percentage accepts values in %.
• Selling Price is displayed as currency.
• Gross Profit is displayed as currency.
• Resulting Margin is displayed as a percentage.

Rounding rules

• Number displays use up to 2 decimal places in the calculator UI.
• Currency outputs are displayed with standard US dollar formatting.
• Percent outputs are displayed with two decimal places.

Version history

Change log