Profit
General profit: selling price minus product, fulfilment, platform, advertising, duties, payment, and other entered costs.
Amazon FBA: selling price minus product, inbound shipping, advertising, supported referral fees, the manually entered FBA fulfilment fee, and other entered costs.
Advertising
Break-even ACOS: pre-advertising profit divided by selling price, expressed as a percentage.
Break-even ROAS: selling price divided by pre-advertising profit. Target values apply the selected safety factor.
Logistics
Volumetric weight: length × width × height divided by the selected divisor. Chargeable weight is the larger of volumetric and actual weight.
CBM and cartons: shipping CBM uses outer carton dimensions. Carton capacity compares six orthogonal product orientations and rounds the required carton count up to a whole carton.
Inputs and rounding
Calculations use the values shown in the form. Displayed currency and percentages are rounded for readability, while internal calculation steps retain additional precision where appropriate.
Assumptions and verification
Each calculator page includes its formula, a worked example, interpretation guidance, and known limits. Marketplace fees, taxes, carrier divisors, surcharges, measurements, and container conditions can change, so verify them against the current source that applies to your business.