Health & Fitness Information

Health & Fitness Information

This page gives general health and fitness information only. It does not list a health calculator, because none is live on this site at present. Health calculators on this site are being rebuilt to the current standard and are not listed here until they are live and tested. BMI is weight in kilograms divided by height in metres squared, with 18.5–24.9 commonly used as the healthy range. BMR can be estimated by the Mifflin-St Jeor equation: for men, 10 x weight in kilograms + 6.25 x height in centimetres – 5 x age + 5; for women, the same calculation minus 161. These figures are general information only and are not medical advice. Consult a doctor or qualified professional for health decisions.

Health calculators illustration

Understanding the figures

Body mass index (BMI)

BMI is weight in kilograms divided by height in metres squared, with 18.5–24.9 commonly used as the healthy range. It is a population-level guide, not a diagnosis: muscle mass, age and other factors affect what a figure means for an individual.

Basal metabolic rate (BMR)

BMR is the energy the body uses at rest, and it can be estimated by the Mifflin-St Jeor equation: for men, 10 x weight in kilograms + 6.25 x height in centimetres – 5 x age + 5; for women, the same calculation minus 161. This is an estimate for general information only.

Good to Know

Four things worth remembering about these figures:

  • These figures are estimates, not medical advice. They work from standard formulas and population averages.
  • Measure inputs honestly and in the same units: morning weight and consistent units give results you can actually compare week to week.
  • Recheck when things change: a new activity level or a different goal means new figures.
  • Use trends, not single readings: the direction over weeks matters more than one figure.

Frequently Asked Questions

Is this information a substitute for a doctor?

No. This page is for general information only and is not medical advice. Consult a doctor or qualified professional for health decisions.

Why read this information?

This page explains, in plain language, the formulas behind common health figures such as BMI and BMR, so you can understand what a figure means — and what it does not.