Calculate Your BMI

Enter your height and weight to get an estimated Body Mass Index.

Tape measure representing body measurement

BMI Calculator

Calculate Your BMI

A quick screening number — not a verdict on your health. Muscle, age and build all shift what it means.

HeightWeight

What Does BMI Actually Tell You?

BMI (weight ÷ height²) sorts adults into four bands: underweight (below 18.5), normal weight (18.5–24.9), overweight (25–29.9) and obesity (30+). It was designed for populations, not individuals — useful as a first screen, weak as a final verdict.

Muscle weighs more than fat — lifters often land in “overweight” while being metabolically healthy.
Age and build shift meaning — the same BMI reads differently at 25 and 65.
Distribution matters more — waist size and activity predict risk better than BMI alone.

Use your result as a starting point: if it surprises you, look at daily movement on Workouts, eating patterns on Nutrition, and the sustainable path on Weight Loss — or try the Calorie Calculator next. Data never leaves your browser. Results are educational estimates, not medical advice (see our Health Disclaimer).

How It Works

Enter your height in centimeters or feet and inches.
Enter your weight in kilograms or pounds.
The calculator applies the BMI formula to both numbers.
Your estimated result appears with its weight category.

BMI Formula

BMI = weight (kg) ÷ height² (m)

Imperial units are converted internally before applying the same formula.

Example Calculation

Height: 175 cm
Weight: 70 kg

≈ 70 ÷ (1.75 × 1.75) ≈ 22.9 — healthy range

What Is BMI?How Weight Is Measured Healthy Weight Basics Understanding Body Composition

remove, weight loss, slim, diet, obesity, stomach, health, nourishment, loss, fitness, overweight, body, lifestyle, calories, success, scale, woman, weight, measurement, squats, weight loss, weight loss, weight loss, weight loss, weight loss, squats, squats, squats

Lose Weight Without the Misery

salad, healthy eating, healthy, food, vegetables, fresh, eat, nutrition, diet, vegetarian, vitamins, lettuce, green, cucumber, wellness, delicious, eating, avocado, organic, salad, salad, salad, salad, salad, diet

Healthy Eating Without the Rules

girl, meditation, nature, yoga, relaxation, woman, meditate, people, relax, exercise, lifestyle, zen, female, meditating, calm, harmony, wellness, healthy, sitting, enjoying nature, meditation, meditation, meditation, meditation, meditation, yoga, yoga, yoga

A Calmer, Healthier Everyday

Frequently Asked Questions

What is a good BMI?

For most adults, 18.5–24.9 is the standard healthy range. Athletes with significant muscle often score higher without higher health risk.

Should I use BMI to determine whether I'm healthy?

No — BMI is a screening measure, not a diagnosis. It doesn't measure body fat. Pair it with waist size, activity, sleep and blood work, and see a clinician with concerns.

How is BMI calculated?

Weight in kilograms divided by height in meters squared. For example, 70 kg at 1.70 m gives 70 / (1.7 × 1.7) ≈ 24.2.

Important

This calculator provides an estimate for general informational purposes. Results may vary depending on individual circumstances. It is not a diagnosis or a substitute for professional medical or nutritional advice.

Health Disclaimer

Methodology & Sources

Calculation method: BMI divides weight in kilograms by height in meters squared, then maps the result to standard adult categories (underweight below 18.5, healthy 18.5–24.9, overweight 25–29.9, obesity 30+).

Calculate Your BMI