Last updated: May 7, 2026
The short version: We are not doctors. This website is for general information only. Do not use it to diagnose, treat, or replace professional medical advice.
Not Medical Advice
Everything on this site — calculators, charts, articles, product recommendations — is for educational purposes. It is not a substitute for a licensed healthcare professional who knows your actual medical history.
I built this tool after seeing my uncle ignore his BMI for ten years, but I am not a doctor, nutritionist, or dietitian. I am a guy who got frustrated with bad health apps and decided to make a better one.
BMI Is Just a Screening Tool
BMI has serious limitations. It cannot tell the difference between muscle and fat. It does not account for age, ethnicity, bone density, or where you carry your weight. A bodybuilder and a couch potato can have the same BMI.
Always confirm your BMI results with a healthcare provider who can look at the full picture: blood work, body composition, family history, and lifestyle.
When to See a Doctor
- Your BMI is under 18.5 or over 30
- You are pregnant, nursing, or planning pregnancy
- You have a medical condition (diabetes, thyroid issues, heart disease, etc.)
- You are under 18 or over 65 (BMI ranges differ)
- You are an athlete or have high muscle mass
- You are experiencing unexplained weight loss or gain
Product Recommendations
We participate in the Amazon Associates program. When you click a product link and buy something, we earn a small commission. It does not cost you extra.
We only recommend products we have researched or used, but we cannot guarantee they will work for you. Read reviews, compare options, and buy what fits your needs.
Accuracy
We do our best to keep information accurate, but mistakes happen. Health guidelines change. If you spot an error, email us at bmitool.org@gmail.com.
Your Responsibility
You know your body better than a website. If something feels wrong, stop reading and call your doctor. No calculator or article can replace that gut feeling.
By using this site, you agree that you have read this disclaimer and understand its contents.