Break-even ROAS calculator
Find out how much you can pay for a sale or a click without losing money.
≈ 2 minutes
Calculate my break-even ROAS
Work out what your ecommerce really earns
See what you keep per sale, how much you can spend on advertising, and what fees, tax and returns are really doing to your margin.
Free
No sign-up
Runs in your browser
Formulas in the open
Four tools
The calculators
Each one answers a specific question, and they all share the same calculation engine and market settings, so their results fit together.
Cost of returns calculator
Work out how much returns cut from your monthly profit.
≈ 3 minutes
Calculate my cost of returns
Etsy profit calculator
Strip out the fees, the tax, the materials, the shipping and the ads.
≈ 4 minutes
Calculate my Etsy profit
Amazon FBA profit calculator
Work out your profit per unit after fees, fulfillment and advertising.
≈ 4 minutes
Calculate my Amazon FBA profit
International
Eight markets, five currencies, two languages
Interface language and calculation market are independent. Read the site in English and calculate with euro fees and German VAT; or read it in Spanish and calculate in US dollars. The market sets the currency, the tax and the Etsy and Amazon fees; the language only sets the words.
Changing currency changes the unit, it does not convert the amounts: this tool applies no exchange rate.
Market
- Spain (ES) · EUR · VAT 21%
- United States (US) · USD · sales tax
- United Kingdom (GB) · GBP · VAT 20%
- France (FR) · EUR · VAT 20%
- Germany (DE) · EUR · VAT 19%
- Italy (IT) · EUR · VAT 22%
- Canada (CA) · CAD · GST/HST 5%
- Australia (AU) · AUD · GST 10%
Start here
Which calculator do I need?
Find the line that sounds most like your situation.
“I spend on Google or Meta and I cannot tell if I am making money”
You need your break-even ROAS: the minimum return below which every advertising pound costs you money.
Break-even ROAS calculator →“I get a lot of returns and I do not know what they cost me”
You need the cost of returns: the impact per return, the monthly loss and the provision you should be setting aside.
Cost of returns calculator →“I sell on Etsy and I cannot follow what gets deducted”
You need the Etsy calculator: it separates every fee applied to an order, plus tax and your own costs.
Etsy profit calculator →“I sell on Amazon FBA and I cannot tell if the product is viable”
You need the Amazon FBA calculator: profit per unit, break-even selling price and units needed for your monthly target.
Amazon FBA profit calculator →ADVERTISEMENT
Recommended path
The order that actually makes sense
The four tools work on their own, but in this order they reinforce each other: every step corrects the margin the next one works with.
Work out the real profit of a sale
Strip out tax, product cost, logistics and your platform's fees. This is the foundation for everything else.
Add the impact of returns
Turn your return rate into a concrete provision per order so you stop working with an inflated margin.
Find out how much you can spend on advertising
With a clean margin, get your break-even ROAS, maximum CPA and maximum CPC so you can bid with a reason.
Compare the results and adjust your costs
Change one figure and watch what moves: price, shipping, fees, advertising. That is where the leak shows up.
How it works
Three steps and you are done
1. Pick your market
The selector in the header loads the currency, the tax and the fees for wherever you sell: Spain, the United States, the United Kingdom, France, Germany, Italy, Canada or Australia.
2. Type your numbers
Price, costs, fees and, if you want, the advanced options. Either decimal mark works, and every field explains what to put in it.
3. Read the interpretation
Beyond the figures, each calculator tells you in plain language what they mean and what is worth checking, with the full breakdown if you want to verify it.
Guides
How to calculate ecommerce profitability
From gross revenue to real profit: tax, product, logistics, gateways, advertising, returns and fixed costs.
Read the guide →ROAS, ACoS, CPA and CPC: differences and formulas
Four metrics measuring the same thing from different angles, with the formulas, the conversions and the usual mistakes.
Read the guide →The real cost of returns in ecommerce
The lost sale, reverse logistics, the fees that do not come back and the provision you should be setting aside per order.
Read the guide →Etsy fees by country: a comparison
The fees Etsy applies to an order, what base each one uses, and how they differ across the eight markets.
Read the guide →Amazon FBA fees by market: a comparison
Selling plans per marketplace, referral fee, fulfillment fee, storage, inbound shipping and advertising.
Read the guide →ADVERTISEMENT
Methodology
How we calculate, no black boxes
Every result on this site can be reproduced by hand. The formulas are published on each calculator page, the tax treatment is explained, and the Etsy and Amazon fees carry their official source, review date and verification status.
We work with the contribution margin: tax-exclusive revenue minus every cost that grows with each order. That is the figure that can actually pay for advertising. Fixed costs are covered by the sum of the month's margins, which is why your targets should sit above break-even.
What the calculations do and do not include
Included:
- Tax, configurable per market
- Product and material costs
- Shipping, packaging and fulfillment
- Gateway and platform fees
- Advertising attributed to the order
- Returns provision
Not included:
- Fixed costs (rent, salaries, software)
- Taxes on profit
- Depreciation and financing
- Tied-up stock and obsolescence
Frequently asked questions
Are the calculators really free?
Yes. No sign-up, no account, no usage limit and no hidden paid tier. The project will be funded by advertising, not by charging for the tools.
Do you store my financial figures?
No. Every calculation runs in your browser. The numbers you type never travel to a server, are never written to a database and disappear when you reload. The only thing stored in your browser is the market code you picked — two letters — so you do not have to select it again.
Can I use the English interface with the Spanish market?
Yes, and that is one of the reasons this version exists. Language and market are independent: either language works with any of the eight markets and their five currencies.
Does it convert the amounts when I change currency?
No, deliberately. Changing market changes the currency unit, the tax and the fees, but applies no exchange rate: there is no currency API behind it. To compare markets, enter the real figures for each one.
Which markets and currencies are covered?
Eight markets — Spain, the United States, the United Kingdom, France, Germany, Italy, Canada and Australia — and five currencies: euro, US dollar, pound sterling, Canadian dollar and Australian dollar. Each market brings its own tax, Etsy fees, Amazon plans and example values.
How reliable are the results?
The formulas are published on every page and the calculation engine is covered by an automated test suite that also checks all eight markets and five currencies. That said, they are estimates: they depend on what you enter and on the fees matching your real invoices.
Are the Etsy and Amazon fees verified?
Every fee carries its official source, its review date and its verification status: verified, derived from a verified sibling figure, or pending verification. Where a source could not be consulted we say so rather than presenting the number as confirmed. And any value you edit always overrides the preset.
Is this project connected to Etsy or Amazon?
Not at all. It is an independent project, not affiliated with, sponsored by or endorsed by Etsy, Amazon or any other platform. Their names appear only to identify whose fees are being modelled.
Independent project. Independent project. Not affiliated with, sponsored by or endorsed by Etsy, Amazon, Shopify, WooCommerce or Google. The preloaded fees are editable reference values: always compare them with your real invoices. Results are estimates based on the information you enter. Fees, taxes and platform terms can change: always check the figure that matters to you against your invoice or the official platform. They do not replace your real invoices, your official accounts or professional tax, financial or legal advice.