What these refuse to do

No industry benchmarks. If a number isn't yours, the tool asks for it or says the result can't be computed. Nothing is filled in silently from a category average.

No scores or traffic lights. Every result is a requirement set against an observation, both from your own figures. Where a threshold is needed, you supply it.

Your financial inputs never leave your browser. All arithmetic runs locally. We record which fields get used, never what you type into them. Open the page source and check.

One model underneath all three

The same contribution engine runs in every calculator — one treatment of COGS, returns, reverse logistics, COD failure and net variable cost, applied per placed order rather than per delivered one.

A 22% RTO rate and a 14% return rate don't reduce gross margin by a fifth. They change what an order is worth in ways gross margin can't express, which is why every figure on these pages is built on contribution instead. Read the Analytics Lab.

The maths gives you the hurdle. Testing tells you whether customers clear it.

These calculators can tell you what has to be true. They can't tell you whether it will be. That takes a look at your live funnel, your creative, and a test designed to actually resolve.