What health calculators are available on Calc4Health?

Calc4Health offers 17+ professional health calculators including BMI, BMR, TDEE, body fat percentage, target heart rate, daily water intake, waist-hip ratio, Cooper test, relative fat mass, body surface area, body adiposity index, body shape index, conicity index, heart rate zones, new BMI Trefethen calculator, Blood Alcohol Content (BAC) calculator, and Dietary Reference Intake (DRI) calculator.

Are Calc4Health calculators free to use?

Yes, all health calculators on Calc4Health are completely free to use. No registration or payment required. Access professional medical calculation tools instantly for your health and fitness monitoring needs.

How accurate are the health calculators?

Calc4Health calculators use scientifically validated formulas and equations from medical research. They provide accurate estimates based on established medical standards, though results should be used for reference and not replace professional medical advice.

Blog - Calc4Health | Health & Wellness Guides

Health & Wellness

Lean Body Mass: What It Is, Why It Matters, and How to Build It (Without Complicating Your Life)

Lean body mass (LBM) is more than “looking toned.” It drives your metabolism, supports healthy aging, and is trainable. Here’s the practical, science-backed way to grow it.

Sep 03, 2025 17

Infographic: Atezolizumab (PD-L1 inhibitor)—simple overview of what it does, where it helps (NSCLC, ES-SCLC+chemo, liver+bevacizumab, selected urothelial), how it’s given (IV), and early side effects.

Therapy Context

Atezolizumab (Tecentriq): A Plain-English Guide Backed by Science

Atezolizumab (Tecentriq) is a PD-L1–blocking immunotherapy used across several cancers. This guide translates the major clinical trials and side-effect data into clear, practical takeaways.

Sep 01, 2025 25

Minimal infographic of Daratumumab (anti-CD38): antibody targeting a myeloma cell; evidence badges “OS+”, “PFS+”, “Phase 3”; IV/SC dosing and safety icons.

Therapy Context

Daratumumab: What It Is, How It Works, and Why It’s a Big Deal

Daratumumab is the first anti-CD38 antibody to reshape multiple myeloma care. Here’s what it does, where it shines, safety must-knows, and the strongest trial data—made simple.

Sep 01, 2025 25

Minimalist infographic showing two stylized brains connected by a green upward arrow, symbolizing ocrelizumab benefits in multiple sclerosis.

Therapy Context

Ocrelizumab: A Friendly, Science-Backed Guide for People Living With MS

Excerpt: Ocrelizumab, a B-cell–targeting antibody, is one of the most effective MS therapies. Here’s what rigorous trials and long-term studies say about benefits, risks, vaccines, pregnancy, and real-world use.

Aug 30, 2025 22

Minimalist infographic of heart rate zones showing five colored levels, from Zone 1 (green) to Zone 5 (red), with a heart and ECG line icon.

Health & Wellness

Heart Rate Zones: Train Smarter

Everything you need to use heart rate zones correctly—from simple calculations to pro-level threshold methods—explained in plain English and backed by research.

Aug 29, 2025 22

Minimalist infographic showing how mepolizumab, an anti-IL-5 antibody, blocks interleukin-5 to lower eosinophil activity in asthma and related diseases.

Therapy Context

Mepolizumab: What the Science Says (and Why Your Eosinophils Care)

Mepolizumab, a targeted anti-IL-5 antibody, can cut exacerbations and steroid use in eosinophilic disease. Here’s the best evidence—decoded and demystified.

Aug 29, 2025 22

Minimalist infographic showing Total Daily Energy Expenditure (TDEE) divided into basal metabolism, activity, and thermic effect of food with icons.

Health & Wellness

Total Daily Energy Expenditure (TDEE): The Science-Backed Guide with Real-World Tips

Your practical, science-first tour of Total Daily Energy Expenditure (TDEE): what it is, how to estimate it, and how to use it for health goals.

Aug 28, 2025 17

Minimalist human silhouette with a golden energy aura at the chest, symbolizing basal metabolic rate (BMR) and resting metabolism

Health & Wellness

Basal Metabolic Rate (BMR): the science-backed guide your body’s been waiting for

BMR is the energy your body burns doing “nothing.” Here’s the simple, research-backed way to understand, measure, estimate, and use it smartly.

Aug 28, 2025 31

Scale with measuring tape and BMI color chart showing healthy to overweight ranges

Health & Wellness

Understanding Body Mass Index: Your Complete Guide to BMI and Health Assessment

BMI has been our go-to health metric for decades, but recent research reveals surprising limitations. Learn how to calculate your BMI correctly, understand what it really means, and discover why modern health experts are recommending additional measurements for a complete picture of your wellness.

Aug 26, 2025 82

Health & Wellness Blog