About Us

CalcFern exists to answer everyday questions quickly: What's my BMI? How much is 30% off? How many words is this essay? We build fast, free, privacy-friendly tools and pair them with clearly written guides that explain the "why" behind the numbers.

What we believe

• Fast beats fancy. Every tool loads instantly and works on any device — no sign-ups, no downloads.
• Privacy by default. Our calculators and text tools run entirely in your browser. Your inputs are never uploaded or stored.
• Plain English. Our guides skip jargon and explain concepts the way a knowledgeable friend would.
• Original content. Everything published here is written by us, for you — never scraped or copied.

Who runs CalcFern?

CalcFern is an independent web project maintained by a small team passionate about making useful things freely available. We fund the site through unobtrusive advertising, which lets every tool stay free for everyone.

Get in touch

Spotted a bug? Want a new tool or topic covered? We genuinely read every message — reach us through the contact page.