Health Calculator
See all-in-one suite of 11 calculators for BMI, Body Fat %, Lean Body Mass, Calories, BMR, TDEE, Pregnancy Gain, and more.
Last updated: June 11, 2026
Shared Profile
Save your core stats here to auto-populate all relevant calculators instantly.
BMI Calculator
Calculate Body Mass Index and weight status category.
Your Body Mass Index
22.9Normal weightA healthy weight range for your height is between 56.7 kg and 76.3 kg.
BMI Category Gauge
Health Calculator — No Uploads Required
A professional Online Health Calculator Suite containing 11 essential calculators for body composition analysis, calorie tracking, pregnancy progress, and growth milestones. The tool is designed to work fully client-side and includes a shared profile bar to sync height, weight, gender, and age instantly across all sub-calculators. Features include: BMI categories with gauges, US Navy Body Fat % tape estimates, Boer/Hume Lean Body Mass calculations, Mifflin-St Jeor BMR/TDEE calculations, pregnancy weight gain curves, daily water & protein requirements, and growth curves.
Why This Tool Exists
What makes this useful — and why I built it this way.
No More Swapping Tools: Access everything from BMI to Pregnancy Gain in one place.
Save Time: Shared profile synchronization cuts down repetitive typing.
Visual Insights: Premium gauges make health diagnostics immediately understandable.
When You'd Use This
Real situations where this tool saves the day.
Health Tracking: Evaluate BMI status, body fat percentage, and lean body mass.
Diet Planning: Find daily calories for fat loss, protein goals, and hydration needs.
Pregnancy Progress: Track recommended gestational weight gain targets week-by-week.
Using Health Calculator
It's straightforward — here's how it works.
Select a sub-calculator from the sidebar list.
Set up your core stats in the top Shared Profile bar.
Adjust specific inputs for the selected sub-calculator.
View health diagnostics instantly and copy reports to your clipboard.
How The Numbers Work
The formulas behind the calculations — for transparency.
Body Mass Index (BMI)
Standard global diagnostic metric classifying adult weight categories as underweight, normal weight, overweight, or obese.
Basal Metabolic Rate (BMR) - Mifflin-St Jeor Equation
Predicts the absolute minimum daily calorie requirement needed to maintain resting metabolic functions at complete rest.
Body Fat Percentage - US Navy Circumference Method
Estimates relative fat mass using body circumference metrics compared against structural height ratios.
Lean Body Mass (LBM) - Hume Formula
Calculates total fat-free tissue weight including organs, muscles, bones, and body water.
Questions People Ask
Honest answers about how this works.
Is my medical/health data saved?
Great question. No. All calculations are performed entirely in your browser's local memory. No data is sent to external servers.
Which formula is used for BMR and TDEE?
We use the Mifflin-St Jeor equation, which is widely considered the most accurate standard formula for estimating BMR in healthy adults.
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