Know your real profit before you source.

All inputs update results instantly. Change any value or solve for a target.

Presets:
Reverse solve

To keep a % margin, pay no more than

$13.78
Scenario sensitivity

At 10% higher sale price

$15.59 profit
Formula & assumptions

Net profit = sale price + shipping charged − product, fulfillment, shipping, marketplace, payment, advertising, returns, prep, and tax costs. Presets are editable planning examples; confirm current account terms.

Decision rule

Stress-test margin before you scale.

Marketplace rates change, so all fee assumptions stay visible and editable. Confirm current terms in your seller account before purchasing inventory.

Unit economics

Seller calculator library

Useful workflows

Start with a decision, not a tool list

Marketplaces

Model and compare the fees and order economics of the channels where you sell.

Profit, pricing & finance

Protect margin, reconcile revenue, test demand, solve a sustainable price, and examine growth capacity.

Advertising & customers

Measure acquisition efficiency and customer value.

Inventory & operations

Manage stock velocity, replenishment, carrying cost, fulfillment, returns, payment costs, and working-capital timing.