Shipping Markup Calculator accuracy and testing

Formula source

• Customer charge = carrier cost * (1 + markup percent / 100) + handling fee. Shipping margin = customer charge - carrier cost.

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

• All rates, fees, costs, order values, demand volumes, and policy targets are user-entered assumptions.
• The calculator uses transparent deterministic formulas and does not fetch live carrier, marketplace, warehouse, tax, or provider rates.
• Results are planning estimates and should be checked against your carrier terms, marketplace fees, inventory system, and accounting policy.
• Inputs are processed locally in your browser.

Unit handling

• Carrier Cost accepts values in $.
• Shipping Markup accepts values in %.
• Handling Fee accepts values in $.
• Customer Shipping Charge is displayed as currency.
• Shipping Margin is displayed as currency.
• Shipping Margin Percent is displayed as a percentage.
• Markup Amount is displayed as currency.

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.
• Input precision follows configured step values where provided.

Version history

Change log