We built CalcBrew because most health calculator websites are cluttered, outdated, and hard to use on mobile. We wanted something better — clean, fast, and trustworthy.
CalcBrew exists to give everyone access to free, accurate, science-based health calculators — without barriers. No account required. No paywalls. No cluttered interfaces full of ads that get in the way of your answer.
We believe health information should be accessible to everyone, everywhere. Whether you're tracking your fitness progress, planning your nutrition, or just curious about a health metric — CalcBrew gives you a clear answer, fast.
We take formula accuracy seriously. Every calculator on CalcBrew is built on clinically established methodology:
BMI Calculator uses the standard formula referenced by the World Health Organization (WHO): weight (kg) ÷ height² (m²), with WHO-standard category classifications.
TDEE Calculator uses the Mifflin-St Jeor equation (1990), which is widely regarded as the most accurate BMR formula for most adults by registered dietitians and nutrition researchers.
We cite our sources transparently and update our tools when established guidelines change.
CalcBrew is an informational tool — not a medical service. The calculators and content on this website are for general educational and informational purposes only.
⚕️ CalcBrew is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or a qualified healthcare provider with any questions you may have regarding a medical condition or health goal. Never disregard professional medical advice because of something you read on this website.
Have a question, found an error in a formula, or want to request a new calculator? We'd love to hear from you.
Reach us at: Contact page — or use the Request a Calculator section on the homepage.