About Health Calculator

I built this site because I wanted free health calculators that didn't require a sign-up or push me toward some supplement subscription.

I'm not a doctor. I'm not a nutritionist. I'm just someone who got interested in understanding how health metrics work — BMI, TDEE, body fat percentage, macro ratios — and wanted straightforward tools to calculate them. The formulas I use are based on publicly available medical research and standard calculation methods. I link to my sources wherever possible so you can verify the numbers yourself.

All the calculators on this site are 100% free. No registration, no upsells, no data collection. If I link to a product or service, it's through an affiliate link that may earn a small commission, but I only recommend things I've actually used or researched enough to trust.

I also run a few other sites (truck gear, indoor plants, personal finance, real estate). Same person, one pair of hands. No editorial team, no medical review board, no fake credentials. Just me building tools I wish had existed when I needed them.

If you find a bug in a calculator, or you think a formula is wrong, tell me. I'll fix it. wenmind85@gmail.com.

— Tom

Disclaimer: All calculators on this site are for educational and informational purposes only. They provide estimates based on standard formulas and should not be considered medical advice. Always consult a qualified healthcare professional before making health-related decisions.