Order profitability
Ecommerce margin calculator
Check gross margin, contribution margin, maximum CPA, and the result once ad spend is included.
Calculate marginEcommerce tools
Free ecommerce calculators
Work out the margin on an order, the ROAS you need to break even, conversion growth, and whether a store promotion still pays off. The tools run without sign-up, and nothing you enter leaves your browser.
Campaign profitability
Break-even ROAS calculator
Calculate the minimum ROAS, maximum CPA, and target ROAS for the margin you choose after ad spend.
Calculate break-even ROASConversion growth
Conversion growth calculator
See how many orders, how much revenue, and how much margin a higher CVR can bring at the same traffic.
Calculate conversion potentialPromotion strategy
Store promotion planner
See how a discount or free shipping changes contribution per order, and how many extra orders you need to keep the same monthly margin.
Plan a promotionResults based on order economics
Revenue or ROAS alone do not show how much is left after a sale. The calculators account for sales tax, product cost, shipping, fulfillment, payment fees, returns, and other variable costs, so you can see what is actually available for advertising and fixed costs.
No sign-up
The result is available right away.
Data stays in the browser
Calculations do not require sending financial data anywhere.
Result with context
You get a number plus a short interpretation.
Results are estimates. The actual figure depends on how you handle sales tax, fees, returns, logistics, and how costs are allocated to orders.
FAQ
Are the tools free?
Yes. The calculators are available with no sign-up and no contact details required.
Does Asttero store the data I enter?
No. Calculations run locally in your browser. Analytics may only receive anonymous information about tool usage and a result range, never the amounts you entered.
Is the result accounting advice?
No. The tools help estimate order, campaign, and promotion economics. They do not replace accounting, controlling, or an analysis of your individual reporting model.
Do the calculators work with other currencies?
Yes. You can choose USD, EUR, GBP, or PLN. The tool does not convert exchange rates, so enter every amount in a single currency.
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