What is a healthy BMI? BMI chart for women and men
Original EKCal illustration.
BMI is one of the most used — and most misunderstood — health screening tools in the world. This guide explains what the numbers mean, shows the full chart, and covers when BMI misleads.
Calculate adult BMI
See BMI category and the healthy-weight range for your height.
Open the free calculator →What is BMI?
Body Mass Index is calculated as weight (kg) ÷ height² (m²). It was developed as a population-level screening tool and is used by health systems worldwide as a first-pass indicator of whether someone's weight may affect their health.
Free BMI calculator — metric and imperial, results in seconds.
Check my BMI →The full BMI chart
| BMI | Category | Health risk |
|---|---|---|
| Under 18.5 | Underweight | Elevated |
| 18.5 – 24.9 | Normal weight ✓ | Low |
| 25.0 – 29.9 | Overweight | Increased |
| 30.0 – 34.9 | Obese Class 1 | High |
| 35.0 – 39.9 | Obese Class 2 | Very high |
| 40+ | Obese Class 3 | Extremely high |
Healthy weight ranges by height
| Height | Healthy weight range (BMI 18.5–24.9) |
|---|---|
| 155 cm / 5'1" | 44–60 kg |
| 160 cm / 5'3" | 47–64 kg |
| 165 cm / 5'5" | 50–68 kg |
| 170 cm / 5'7" | 54–72 kg |
| 175 cm / 5'9" | 57–76 kg |
| 180 cm / 5'11" | 60–81 kg |
| 185 cm / 6'1" | 63–85 kg |
Where BMI falls short
Muscle vs fat
Muscle is denser than fat. Athletes and heavily muscular people often fall in the "overweight" BMI range while having very low body fat. BMI can't distinguish between the two.
Fat distribution
Where fat is stored matters as much as how much. Visceral fat (around organs) is far more harmful than subcutaneous fat. Waist circumference adds important context: above 88 cm for women or 102 cm for men signals elevated risk regardless of BMI.
Ethnicity differences
People of South Asian, East Asian, and Middle Eastern descent face higher health risks at lower BMI values. Some organisations recommend lower thresholds (overweight: 23; obese: 27.5) for these populations.
Key takeaways
- A healthy BMI for both women and men is 18.5–24.9.
- BMI can't distinguish muscle from fat — athletes often appear "overweight."
- Waist circumference adds context: aim for under 88 cm (women) or 102 cm (men).
- For South/East Asian populations, lower BMI thresholds may be more appropriate.
- Use BMI as a guide alongside energy levels, blood markers, and body composition.
BMI is a screening tool
BMI is useful for population studies and as a quick starting point, but it does not directly measure body fat, muscle, bone, fat distribution or fitness. A muscular person may have a high BMI without high body fat, while someone with a “normal” BMI may still have health risks.
For individual decisions, consider waist measurement, blood pressure, blood tests, symptoms, medical history and clinical examination.
When to seek advice
Talk with a health professional if weight is changing without explanation, if you have symptoms, if you are pregnant, under 18, older and frail, or if weight concerns are affecting eating behavior or mental health.
A simple way to put this into practice
- Choose one measurable behavior for the next seven days.
- Keep the rest of your routine reasonably stable.
- Review weekly averages rather than one-day results.
- Adjust only after you have enough information.
Sources and evidence base
- National Institute of Diabetes and Digestive and Kidney Diseases — Weight Management
- Centers for Disease Control and Prevention — Healthy Weight and Growth
- Physical Activity Guidelines for Americans
- USDA FoodData Central
References support general principles; they do not make EKCal a substitute for clinical care. See our Editorial Policy and Sources & Methodology.