BMI Calculator
Body Mass Index with WHO and Asia-Pacific cut-offs, ideal weight range, BMR/TDEE and waist-to-height ratio.
BMI
22.9
Normal
Ideal weight
56.7–76.3 kg
BMI Prime
0.91
BMR
1,659 kcal
TDEE
2,571 kcal
Healthy weight goal (BMI 22)
67.4 kg
Lose 2.6 kg · ~550 kcal/day
Health disclaimer: This result is for general informational purposes only and is not medical advice. Individual health needs vary — consult a qualified healthcare professional before making health, diet, or medical decisions.
📐 About This Calculator
Body Mass Index estimates whether your weight is healthy for your height. It is a quick screening tool, not a diagnosis — it does not distinguish muscle from fat.
Variable Definitions:
- • BMI Prime = BMI ÷ 25 — 1.0 is the upper normal limit
- • Ponderal Index = weight ÷ height³ — more stable for very tall/short people
✅ Best used for:
- • A first screen of weight-related health risk
- • Tracking change over time
- • Setting a healthy weight goal
⚠️ Limitations:
- • Does not separate muscle mass from fat mass
- • Less accurate for pregnant people, children and the elderly
- • Asian populations use a lower threshold (23 = overweight)
📖 How BMI is Calculated
What is BMI and why it matters
BMI, devised by Adolphe Quetelet (1832), turns weight and height into a single number that the WHO and clinicians use as a screening tool for weight-related risk.
Metric vs imperial
Metric divides weight in kg by height in metres squared. Imperial uses (lb × 703) ÷ inches². This calculator converts automatically whichever units you enter.
BMI Prime and Ponderal Index
BMI Prime is your BMI ÷ 25; 1.0 sits exactly at the upper healthy limit. The Ponderal Index divides weight by height cubed and is slightly more reliable for very tall or short people.
A note for Asian populations
The WHO Asia-Pacific thresholds are lower: overweight starts at 23 and obesity at 27.5. Toggle to Asia-Pacific if that scale fits you better.
Limitations
BMI only compares weight to height. A muscular athlete can read as "obese" while being healthy, so treat BMI as a starting point — your doctor makes the final call.