About

Medical consensus on body weight is shifting; what is healthy for a 20-year-old may be frail for a 70-year-old. This comprehensive dashboard incorporates age-adjusted mortality risk curves. While standard BMI charts penalize any value over 25, geriatric studies indicate that a slightly higher BMI (up to 27 or 29) in older adults correlates with better survival rates against illness and trauma. This tool calculates your standard metrics but interprets them through the lens of your specific life stage, providing a more nuanced view of metabolic health than a generic chart.

Formulas

We utilize the Mifflin-St Jeor equation for Basal Metabolic Rate (BMR), widely considered the most accurate for modern populations.

{

Men: 10W + 6.25H − 5A + 5Women: 10W + 6.25H − 5A − 161

Where W is weight (kg), H is height (cm), and A is age (years). Total Daily Energy Expenditure (TDEE) adjusts BMR by an activity factor k:

TDEE = BMR × k

Reference Data

Age Group	Underweight	Normal/Healthy	Overweight	Obese
18 - 64	< 18.5	18.5 - 24.9	25.0 - 29.9	≥ 30.0
65+ (Geriatric)	< 23.0	23.0 - 29.9	30.0 - 34.9	≥ 35.0

Frequently Asked Questions

Epidemiological data shows the "Obesity Paradox" in older adults. A small reserve of fat provides a metabolic buffer during illness, hospitalization, or falls. Being "normal" weight by young standards (e.g., BMI 19) is associated with higher frailty and mortality risks in those over 65.

It provides an estimate based on the Jackson-Pollock derivation using BMI, Age, and Gender, but it is a statistical approximation. For precise body fat measurement, DEXA scans or calipers are required.

This is a comparative metric. If your BMR is similar to the average BMR of someone younger than you, your metabolic age is lower (better). If your BMR is lower than average for your age group, your metabolic age reads higher, suggesting a need for increased muscle mass or activity.