About this tool
Make the result useful—not just precise-looking
Turn a selling price and its direct costs into a concise unit-economics scorecard. Percentage fees are calculated from selling price, while fixed costs are applied per unit.
How to use it
- Enter the customer-facing selling price.
- Add product, shipping, advertising, and other per-unit costs.
- Enter payment or marketplace fees as a percentage and a fixed amount, then calculate.
Useful for
- Checking a new product before launch
- Reviewing margin after a supplier or shipping increase
- Comparing two selling-price scenarios
Assumptions
- All amounts use the same currency.
- Percentage fees apply to selling price only.
- Quantity scales unit economics without volume discounts.
Limitations
- Taxes, refunds, overhead, and tiered fee rules are excluded unless entered as other cost.
- Rounding may differ from a marketplace settlement by a few minor currency units.
Common questions
Frequently asked questions
What is the difference between margin and markup?
Margin is profit divided by selling price. Markup is profit divided by cost. The same product therefore has different margin and markup percentages.
Should I include tax in the selling price?
Use net-of-tax amounts when tax is collected on behalf of an authority. If tax is a true cost to the business, add it to other cost.
Where should packaging go?
Include per-order packaging in shipping and fulfillment or in other cost, but not both.