About

The short version

Fat Man's Journey is a small collection of free fitness tools I built for myself while figuring out my own weight and health. I got tired of every TDEE calculator forcing an email signup, hiding the results behind a paywall, or covering the page in ads for things I didn't want.

So I built the version I wanted to use. And then made it public, because I figured other people probably wanted the same thing.

What's here

Five tools, all free, all doing one thing well:

• TDEE Calculator - your daily calorie needs, with macro splits, BMI and ideal weight.
• BMI Calculator - body mass index with a visual scale and healthy weight range.
• Macro Calculator - protein, carbs and fat, by percentage or by body weight.
• Calorie Deficit Planner - a realistic timeline to your goal weight, accounting for your TDEE dropping as you lose.
• Body Fat Estimator - Navy tape method, with fat and lean mass breakdown.

What it isn't

It's not medical advice, and it isn't a substitute for talking to a doctor or a registered dietitian. All the numbers here are estimates based on widely-used formulas - useful as a starting point, not as gospel. Your body will tell you more in a month than any calculator can in a second.

How it's built

Everything runs in your browser. No data is sent to a server, no account is required, and nothing is stored anywhere except the fields you're typing into. The site is hosted on Cloudflare Pages and the whole thing is hand-coded - no frameworks, no trackers beyond basic analytics, no ads.

If I ever add affiliate links or recommendations, I'll say so clearly. They'll only ever be for things I actually use or would recommend. The TDEE page has a few at the bottom, marked as affiliate links.