Multi-Product Profit Calculator
Profit across several lines at once.
Total contribution
$6,880
Product A contributes most
Product B has the better margin percentage, but Product A contributes more money. Volume usually beats percentage when deciding what to promote.
How the Multi-Product Profit Calculator works
Products rarely fail obviously. They fail by quietly earning less than the shelf space, attention and capital they consume — which only becomes visible when several lines are laid out side by side with their real contribution shown.
Not financial advice. Marketplace fees change, and they vary by country, plan and seller status. Every rate here is an editable default, not a quoted price — check the platform's current fee schedule before you price a product against it. This is not tax or business advice.
Frequently asked questions
How do I compare profitability across products?
By total contribution, not margin percentage. A product with a 25% margin selling 500 units contributes far more than a 70% margin item selling ten. Percentage tells you about efficiency; contribution tells you about impact.
Which product should I promote?
Generally the one with the highest contribution per unit of whatever constrains you — advertising budget, production hours, or capital. The constraint decides the right denominator, and it is rarely simply margin percentage.
When should I discontinue a product?
When its contribution does not justify the capital, storage and attention it takes, and there is no strategic reason to keep it. Negative contribution is an immediate case; low positive contribution is a judgement about opportunity cost.
How does product mix affect overall margin?
Heavily, and often invisibly. Shifting sales toward lower-margin lines can reduce total profit even as revenue grows. Watching blended margin alongside revenue catches this far earlier than watching revenue alone.