General
Yes — completely free, with no catches. There are no premium tiers, no feature locks, and no trial periods. Every calculator on EcomCalc is fully functional from the moment you land on the page. We keep the site running through occasional sponsorships and the newsletter, not by gating your access to tools.
No account required — ever. Just open any calculator and start entering numbers. Nothing is stored on our servers, and nothing is tracked beyond basic anonymous analytics. Your data lives only in your browser tab and disappears when you close it.
The math is precise — the results are only as accurate as the numbers you put in. Our formulas follow standard ecommerce accounting (gross profit, net margin, LTV, CAC, ROAS, etc.) and the Shopify fee structure is kept up to date with published rates. That said, treat the outputs as a strong guide rather than a guarantee. Real-world costs like chargebacks, storage fees, or currency fluctuations may not be fully captured unless you account for them in your inputs.
All calculators support USD ($), EUR (€), GBP (£), and CZK (Kč) via the currency selector at the top of each tool. The underlying math is currency-agnostic — switching the symbol just changes how values are displayed, not how they're calculated. If your currency isn't listed, pick any symbol and treat the numbers as your local unit.
Using the calculators
If you're just getting started, the Profit Margin Calculator is the right first stop — it gives you a clear picture of what you actually make on each sale once all your costs are accounted for. From there, the Pricing Calculator helps you work backwards from a target margin to set the right selling price. If you're running paid ads, move on to the CAC Calculator and Ad Metrics Calculator to make sure your acquisition costs make sense.
Gross profit is what's left after subtracting your product cost and shipping from the sale price — it ignores everything else. Net profit goes further and deducts platform fees, payment processing fees, and ad spend as well. Gross profit tells you if the product itself is viable; net profit tells you if the business is viable. Many stores look profitable at the gross level and lose money at the net level — which is exactly why the Profit Margin Calculator shows you both.
Benchmarks
It depends on the model, but a useful rule of thumb: aim for a gross margin above 50% and a net margin of at least 15–25% after all fees and ad spend. Low-ticket, high-volume products (under $30) often need margins well above 60% gross to stay healthy once ads are factored in. Higher-ticket items can sometimes work at lower gross margins because the absolute dollar profit per unit is still substantial. The Product Viability Calculator applies these thresholds automatically and gives you a clear verdict.
The widely-cited benchmark is 3:1 or higher — meaning you earn three dollars in lifetime value for every dollar you spend acquiring a customer. A ratio below 1:1 means you're losing money on every customer. Between 1:1 and 2:1 is a danger zone where you may be covering acquisition costs but not leaving enough for overhead and growth. Above 4:1 can actually indicate you're under-investing in acquisition and leaving growth on the table. Use the LTV Calculator to find your ratio and see where you stand.
Compatibility
Most calculators work for any platform — you just enter your own fees manually. The Profit Margin, Pricing, CAC, LTV, Ad Metrics, Refund Impact, and Product Viability calculators all have a general "platform fee" or "other fees" field where you can plug in whatever Amazon, Etsy, WooCommerce, or TikTok Shop charges you. The one exception is the Shopify Fees Calculator, which is Shopify-specific and uses their published plan and transaction fee structure.
We add new calculators whenever there's a clear gap — a common ecommerce decision that doesn't yet have a good, no-signup tool. There's no fixed schedule, but if you sign up for the newsletter on the homepage you'll get an email the moment a new one goes live. If there's a specific calculation you'd like to see, you can reach out and suggest it.