Business tools

Product Margin Stack Calculator

Stack per-unit and per-order product costs to see contribution profit, margin and the sales volume needed for a target.

Use the same currency throughout. Percentage-based fees are calculated from selling price; blank optional costs count as zero.

The calculation runs locally in your browser. No input values are saved or sent to a server.

See what each product sale contributes after variable costs.

Product economics

Selling price

The price a customer pays for one product or order. Must be greater than zero.

Product cost / COGS

Direct product cost (cost of goods sold) for one unit or order.

Variable costs

Shipping cost (optional)

Fulfillment / handling cost (optional)

Packaging cost (optional)

Marketplace / platform fee (optional)

Percentage-based selling-platform fee, calculated from selling price.

Payment processing fee (optional)

Percentage-based fee charged to process the payment, calculated from selling price.

Fixed transaction fee (optional)

Returns / refund allowance (optional)

Estimated share of selling price reserved for expected returns or refunds.

Advertising / acquisition cost per order (optional)

Other variable cost per unit / order (optional)

Target profit

Target total contribution profit (optional)

Optionally estimate how many units are needed to reach this total contribution profit.

About this calculator

How to read this estimate

Contribution profit is selling price minus the variable costs you enter. Contribution margin expresses that profit as a share of selling price. This calculator estimates variable product economics, not formal accounting profit, and does not label any margin universally good or bad. Fixed overhead such as rent, salaries, software or administration is excluded unless entered as an additional per-unit cost.