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BMI Calculator
BMI Calculator
Track Your Health Journey with a Fast, Accurate BMI.
General Guidance
Under 18.5 suggests underweight, which may indicate nutritional deficiency.
18.5–24.9 is considered a healthy range.
25–29.9 suggests overweight, carrying extra health risks.
30 and above falls into the obese category, with increased risk of chronic conditions.
While BMI doesn’t distinguish between muscle and fat or account for distribution of weight, it gives a fast, standardized snapshot that helps your GP spot trends, start conversations about diet, exercise and overall wellbeing, and tailor advice to keep you on track.
Limitations & Considerations
Doesn’t distinguish mass type: A muscular athlete may have a “high” BMI but low body fat.
Ignores fat distribution: Central (“apple‐shaped”) obesity carries greater risk than peripheral fat, so waist circumference is often measured alongside BMI.
Population differences: Some ethnic groups face higher cardio‑metabolic risk at lower BMI thresholds.
Beyond the Number
Because BMI is just one piece of the puzzle, a GP will often combine it with:
Waist circumference (abdominal fat indicator)
Blood pressure, blood sugar & lipid panels
Dietary & activity review
Family history & other risk factors
Together, these give a fuller picture of a patient’s health and guide personalized advice on diet, exercise, and, where needed, medical or surgical interventions.
Body Mass Index (BMI) is a quick, easy way to estimate whether you’re in a healthy weight range for your height. It’s calculated by dividing your weight (in kilograms) by the square of your height (in metres), or using our calculator - by converting pounds and inches into the same metric.
Professional GP advice, anytime, anywhere
