About
Tools, not noise.
IFN Tools is a small workshop on the web. We build single-purpose utilities that answer one question well — how much protein do I need, what is this salary per hour, how many tokens is this text — and then get out of your way.
How the tools work
Every calculation happens locally in your browser with plain JavaScript. There is no account, no server round-trip, no analytics following you around. If a formula has a name — Mifflin-St Jeor, Epley, the 15.3% self-employment tax — we tell you which one we used and why.
Why free?
Simple tools should be free. The site is supported by advertising and occasional affiliate links to products we genuinely think fit the page. A calculator page will never try to sell you something you didn't come for.
Accuracy
We aim for correct, well-sourced math — but these are planning tools, not professional advice. Tax rules change, bodies differ, markets move. For decisions that matter, check with a qualified professional.
Contact
Found a bug or want a tool built? Reach us at hello@ifn.app.