Questions, answered.
How to use the tools, understand your results and keep your numbers private.
Are all 100 calculators free?
Yes. The calculator library has no subscription, account requirement or email gate.
Do you store my calculations?
No. Inputs and results stay in your browser tab. Refreshing clears comparison scenarios. Download a CSV if you want to keep a copy.
Which currency should I use?
Use the same currency for every money input in one calculation. There is no exchange-rate conversion. Currency units in examples are illustrative.
Can I use the results for business decisions?
Use them to check arithmetic and explore assumptions. Validate your source records, read the limitations and obtain professional review when the decision calls for it.
Why do similar calculators show different answers?
They may use different definitions, timing or rounding. Compare the formulas: margin and markup have different denominators, and annual recurring revenue is not cash collected.
Can I download or embed a calculator?
You can download a result CSV from the calculator. The Resources page also offers blank spreadsheet templates and selected no-tracking embeds.
Does the site work on mobile?
The tools adapt to narrow screens and support keyboard input. If something is difficult to use with your device or assistive technology, please report it.
Are the tools available in Spanish?
A Spanish pilot offers four fully explained calculators. The complete 100-tool library and the published financial guides are currently in English.
How can I report an error?
Email the URL, fictional sample inputs and the expected result to hello@profimetrics.online. Include the formula or reference you used.
Need a specific answer?
Each calculator also includes its own formula and FAQ.