Healthy Weight Calculator
Metric Formula:
BMI = weight(kg) ÷ (height(m)²)
Example: 70kg ÷ (1.75m × 1.75m) = 22.9 BMI
Imperial Formula:
BMI = (weight(lbs) ÷ (height(in)²)) × 703
Example: (150lbs ÷ (69in × 69in)) × 703 = 22.1 BMI
BMI Categories:
• Severely Underweight: BMI < 16
• Underweight: BMI 16-18.4
• Healthy: BMI 18.5-24.9
• Overweight: BMI 25-29.9
• Obese Class I: BMI 30-34.9
• Obese Class II: BMI 35-39.9
• Obese Class III: BMI ≥ 40
Understanding Healthy Weight
What constitutes a healthy weight?
Our Ideal Body Weight Calculator uses Body Mass Index (BMI) to provide a range of weights considered healthy for your height. This tool utilizes standard algorithms to determine weight categories, with a BMI between 18.5 and 25 kg/m² generally indicating a healthy weight for adults aged 18 and over.
It’s important to note that while this calculator offers a valuable estimation, it doesn’t account for individual factors like body composition. For a personalized assessment, including muscle mass and bone density, consulting a healthcare professional is recommended. For more information regarding the basics of BMI, please see our dedicated BMI Calculator.
The Impact of Weight on Health
Maintaining a healthy weight is crucial for overall well-being. Deviations from this range can lead to various health complications. Here’s a breakdown of the potential effects of being underweight, overweight, and obese:
Underweight (BMI < 18.5):
- Being underweight can stem from various factors including genetics, dietary deficiencies, metabolic disorders, substance use, or underlying illnesses. It’s often associated with conditions like hyperthyroidism, cancer, and tuberculosis.
- Studies indicate that underweight individuals may face increased mortality risks, though this could be influenced by disease-related weight loss.
- Other potential issues include low energy, osteoporosis, weakened immunity, and malnutrition, particularly when caused by inadequate nutrition.
- For women, being underweight can lead to menstrual irregularities, infertility, and pregnancy complications.
Overweight (BMI 25-30):
- Typically, overweight is a result of calorie imbalance, but it can also be influenced by genetics, lifestyle, and psychological factors.
- The health implications of being overweight are debated. While some studies suggest a lower mortality rate compared to normal weight, it’s crucial to acknowledge the increased risk of chronic diseases like diabetes, heart disease, and certain cancers.
Obese (BMI > 30):
- Obesity is primarily linked to sedentary lifestyles, excessive calorie intake, and genetic predispositions, with rarer cases caused by hormonal imbalances or medications.
- It significantly elevates the risk of cardiovascular diseases, type 2 diabetes, musculoskeletal disorders, certain cancers, sleep apnea, and depression.
- Obesity is a leading preventable cause of death worldwide, impacting life expectancy.”
Strategies for Achieving and Maintaining a Healthy Weight
Whether you’re aiming to gain, lose, or maintain weight, a holistic approach involving diet, exercise, and mental well-being is essential:
For Underweight Individuals:
- Increase calorie intake with nutrient-dense foods like whole grains, lean proteins, and healthy fats.
- Incorporate strength training to build muscle mass.
- Address any underlying mental health issues contributing to weight loss.
For Overweight and Obese Individuals:
- Adopt a balanced diet with reduced intake of processed foods, sugary drinks, and unhealthy fats.
- Engage in regular physical activity, following guidelines from organizations like the WHO.
- Consider societal factors influencing food choices and access to healthy lifestyles.
Important Considerations:
- Achieving and maintaining a healthy weight is a personalized journey. Consulting a healthcare professional can provide tailored advice and address individual needs.
- Remember that BMI is a tool, not a definitive measure of health. Consider factors like muscle mass and body composition for a comprehensive assessment.
References:
- Flegal, Katherine M., Graubard, Barry I., Williamson, David F., et al. 2017. “Excess Deaths Associated With Underweight, Overweight, and Obesity.”The Journal of the American Medical Association 294(15): 1861-1867. doi:10.1001/jama.293.15.1861.
- WHO. 2021. “Obesity and overweight.” Media Centre. Last modified June, 2021. www.who.int/mediacentre/factsheets/fs311/en/