BMI Calculator
InternetAiTools.com · Body Mass Index · Metric & Imperial · Ideal Weight Range
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Gender
Male
Female
25 yrs
170 cm
65 kg
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Enter your details
Height
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Weight
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BMI Score
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Age
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Ideal Weight Range for your height
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Weight to Lose/Gain for Normal BMI
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BMI Scale - Where Do You Stand?
Underweight
Normal
Overweight
Obese I
Obese II+
Below 18.518.5-24.925-29.930-34.935+
Health Tips Based on Your BMI
📊 Free BMI Calculator – Track Your Health
Calculate your Body Mass Index instantly with our free BMI calculator. Get accurate results in both metric (kg/cm) and imperial (lb/ft) units. Understand your weight category - underweight, normal, overweight, or obese - based on WHO standards. View your ideal weight range, receive personalized health tips, and track weight loss or gain goals. Perfect for fitness enthusiasts, healthcare monitoring, weight management, and overall wellness assessment. No registration, no data storage - complete privacy guaranteed.
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Frequently Asked Questions
What is BMI and how is it calculated?
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BMI (Body Mass Index) is a measure of body fat based on height and weight. It is calculated by dividing your weight in kilograms by your height in meters squared (kg/m²). For imperial units, it's (weight in pounds × 703) ÷ (height in inches squared).
What is a healthy BMI range?
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According to the World Health Organization (WHO), a healthy BMI range is between 18.5 and 24.9. Below 18.5 is considered underweight, 25-29.9 is overweight, and 30+ is obese. This calculator uses the standard WHO classification.
Is BMI accurate for everyone?
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BMI is a useful screening tool but has limitations. It may overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. It may also be less accurate for pregnant women and different ethnic groups. Always consult a healthcare provider for a complete health assessment.
What is the ideal weight for my height?
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The ideal weight range for a healthy BMI (18.5-24.9) varies by height. This calculator shows the ideal weight range for your specific height in both metric (kg) and imperial (lb) units. For example, a person 170 cm tall has an ideal weight range of approximately 53-72 kg.
What are the health risks of high or low BMI?
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High BMI (obesity) increases risk of heart disease, diabetes, high blood pressure, stroke, and certain cancers. Low BMI (underweight) may indicate malnutrition, weakened immune system, osteoporosis, and fertility issues. Maintaining a healthy BMI is important for overall health and longevity.
Note: BMI interpretation differs for children (2-18 years) and elderly (65+). For children, BMI is age and gender-specific. For seniors, a slightly higher BMI (22-27) may be protective.
Disclaimer: This BMI calculator uses the standard WHO formula. BMI is a screening tool only and does not directly measure body fat or health. Always consult a qualified doctor for medical advice.
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