bmi – mediumblue-jaguar-366246.hostingersite.com

Age ages: 2 – 120

Gender

Male Female

Height cm

Weight kg

Result

23 kg/m² (Normal)

UnderweightNormalOverweightObese

18.5253035

– Healthy BMI range: 18.5 kg/m² – 25 kg/m²

– Healthy weight for the height: 128.9 lbs – 174.2 lbs

– BMI Prime: 0.92

– Ponderal Index: 12.9 kg/m³

Understanding Your BMI – Formulas & Insights

The Body Mass Index (BMI) is a simple, widely used measure to categorize weight status. It is calculated from your height and weight using the following formula:

Metric: BMI = weight (kg) / [height (m)]²
US units: BMI = (weight (lb) / [height (in)]²) × 703

For adults aged 20 and older, BMI is interpreted using standard categories: Underweight (<18.5), Normal (18.5–24.9), Overweight (25–29.9), and Obese (≥30). These ranges are based on large population studies and correlate with health risks.

🧮 Additional Metrics We Provide

Healthy weight range: The weight corresponding to a BMI of 18.5 to 25. For metric: weight = BMI × height² (in meters). For US: weight (lbs) = BMI × height² (in inches) / 703.
BMI Prime: A ratio of your BMI to the upper limit of the normal range (25). BMI Prime = BMI / 25. A value of 1 means you are exactly at the upper normal limit; below 1 is healthy, above 1 indicates excess weight.
Ponderal Index (PI): Similar to BMI but uses height cubed: PI = weight (kg) / [height (m)]³. It is sometimes used in pediatrics and for very tall individuals.

🎯 Why Use This Calculator?

Our tool not only gives your BMI but also provides a complete picture: visual scale marker, healthy weight range (in both metric and US units), BMI Prime, and Ponderal Index. Whether you are tracking fitness goals, preparing for a medical consultation, or just curious, these numbers offer deeper insight.

⚠️ Important Limitations of BMI

BMI is a screening tool, not a diagnostic. It does not distinguish between muscle and fat, nor does it account for age, gender, or bone density. Athletes may have a high BMI due to muscle mass, while older adults may have normal BMI but low muscle mass (sarcopenia). Always consult a healthcare professional for a complete assessment.

❓ Frequently Asked Questions

Q: What is the formula for BMI in metric and imperial?

Metric: BMI = weight (kg) / height (m)². Imperial: BMI = (weight (lb) / height (in)²) × 703. Our calculator handles both automatically.

Q: Why is BMI Prime useful?

BMI Prime gives a quick, intuitive sense of where you stand relative to the healthy range. For example, a BMI Prime of 1.2 means you are 20% above the upper limit.

Q: What is Ponderal Index?

Ponderal Index = weight / height³. It is less influenced by extreme heights and is sometimes used for infants or tall people. A normal range is roughly 11–14 kg/m³.

Q: Is BMI accurate for children?

For children and teens, BMI is interpreted using percentiles based on age and gender. This calculator is for adults (age 20+).

Q: Can I use this calculator during pregnancy?

Standard BMI is not applicable during pregnancy. Consult your healthcare provider for weight management.

⚠️ Disclaimer

Finance ToolBajar’s BMI calculator is for informational purposes only and should not replace professional medical advice. The results are estimates and may not reflect your actual body composition or health status. Always consult a qualified healthcare provider before making any decisions related to your weight or health.