Our free BMI Calculator helps you calculate your Body Mass Index instantly. Whether you’re male or female, this tool estimates if your weight is within a healthy range based on your height, weight, and age. It supports both metric (kg/cm) and imperial (lbs/inches) units.
Check your BMI for men, women, or by age to track your health and fitness level accurately.
The Body Mass Index (BMI) is a simple and effective way to determine whether your weight is appropriate for your height. It’s used globally by healthcare professionals to assess potential health risks associated with underweight, overweight, or obesity.
Example: For a person weighing 70 kg and with a height of 1.75 m:
BMI = 70 ÷ (1.75 × 1.75) = 22.9
Result: Normal weight range.
BMI for men and BMI for women are calculated using the same formula, but body composition may vary. Men typically have higher muscle mass, while women naturally carry more body fat. Therefore, results should be interpreted along with other health indicators.
Although BMI formulas remain the same for all ages, interpretation differs slightly for children and seniors. For adults over 20, standard BMI ranges apply. For children and teens, percentile charts are used to compare growth and development by age and gender.
BMI is not a perfect measure. It doesn’t distinguish between muscle and fat, nor does it reflect fat distribution. Athletes may show a high BMI even if they have low body fat. Always pair BMI with waist circumference and other health metrics for accuracy.
The BMI Calculator is a quick, reliable tool for monitoring weight and health status. Use it regularly to maintain a balanced lifestyle and understand your fitness progress.
Explore our other Health & Fitness Calculators including Body Fat, Ideal Weight, and Calories Calculator.
A healthy BMI for adults is between 18.5 and 24.9, indicating normal weight.
The BMI calculator for men uses the same formula as for women, but results can vary slightly due to higher muscle mass in males. It’s a good indicator for general health tracking.
The BMI calculator for women helps estimate healthy body weight according to height. Women tend to have higher body fat percentages, so BMI should be interpreted with lifestyle factors.
The BMI calculator by age helps determine whether weight is healthy across different age groups. For children and teens, BMI is age- and sex-specific, shown as percentiles.
Not always. Athletes with higher muscle mass might have a higher BMI but low body fat. For them, body fat calculators offer more accurate insight.
Yes, BMI is effective for monitoring progress over time. A decrease in BMI generally indicates fat loss if muscle mass remains stable.