Calculate your body mass index and understand what it means for your health with personalized interpretation
I would like you to calculate my Body Mass Index and help me understand what the result means in context. My weight is [WEIGHT] and my height is [HEIGHT]. I prefer [UNIT_SYSTEM:select:Imperial (pounds, feet/inches),Metric (kilograms, centimeters)]. For additional context that may be relevant: my age is [AGE?], I am [SEX?:select:Male,Female,Prefer not to say], and my activity level is [ACTIVITY_LEVEL?:select:Sedentary (little or no exercise),Lightly active (light exercise 1-3 days/week),Moderately active (exercise 3-5 days/week),Very active (hard exercise 6-7 days/week),Extremely active (very hard exercise or physical job)]. My waist circumference is approximately [WAIST_CIRCUMFERENCE?] if that helps provide additional insight. Please calculate my BMI using the standard formula (weight divided by height squared), then provide my result along with which standard category it falls into. Explain what this number actually represents and what it does not capture. BMI has known limitations including not distinguishing between muscle mass and fat, not accounting for bone density, and having thresholds that were developed using specific populations that may not apply universally. Include any relevant context based on my age, sex, or activity level if I have provided those details. If I included my waist measurement, incorporate what that adds to the overall picture since waist circumference can be a useful complementary measure for assessing health risks. Please note that I understand this calculation is for informational and educational purposes only. BMI is a screening tool, not a diagnostic measure of individual health. I will consult with a qualified healthcare provider for proper health assessment, especially before making any changes to my diet or exercise routine. This prompt does not constitute medical advice.
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Get Early AccessBody Mass Index is a screening number calculated by dividing your weight in kilograms by your height in meters squared. The formula is simple, but interpreting the result requires context. A BMI of 25 does not mean the same thing for a 25-year-old athlete and a 70-year-old with low muscle mass.
Standard BMI categories classify under 18.5 as underweight, 18.5 to 24.9 as normal, 25 to 29.9 as overweight, and 30 or above as obese. These ranges were set by the WHO and apply broadly, but they do not account for age, sex, muscle mass, or body fat distribution. This prompt goes beyond the basic number. Enter your [WEIGHT], [HEIGHT], and [UNIT_SYSTEM] for the calculation, then add [AGE], [SEX], and [ACTIVITY_LEVEL] for a more complete interpretation. Including [WAIST_CIRCUMFERENCE] adds a second data point that helps distinguish between muscle weight and visceral fat, which standard BMI misses entirely.
BMI has become especially relevant as weight management medications like GLP-1 agonists use specific BMI thresholds for eligibility. Understanding where you fall on the scale and what that number actually means for your body type is the first step in any health assessment. Use Dock Editor to calculate your BMI with personalized context. For related health metrics, see our body fat calculator and tdee calculator.
Provide your [WEIGHT] and [HEIGHT] in your preferred [UNIT_SYSTEM] (metric or imperial). The prompt handles the conversion and applies the standard BMI formula automatically.
Enter your [AGE] and [SEX] so the interpretation accounts for age-related BMI shifts and sex-specific body composition differences. BMI ranges mean different things at different life stages.
Select your [ACTIVITY_LEVEL] and optionally provide [WAIST_CIRCUMFERENCE]. These inputs help distinguish between a high BMI from muscle mass versus excess body fat.
Read your BMI number, category classification, and the personalized interpretation that factors in your age, sex, and activity level. The analysis explains what your number means for your specific situation.
The output includes context on healthy ranges for your demographic, limitations of BMI as a single metric, and suggestions for additional measurements that give a more complete picture of body composition.
Individuals checking their BMI as a starting point for fitness goals or weight management. The calculator provides the number plus context about what it means for their specific age, sex, and activity level.
Patients preparing for doctor visits where BMI will be discussed. Understanding your number and its limitations before the appointment leads to more informed conversations about weight, medication eligibility, and health planning.
People tracking body composition changes over time use BMI alongside other metrics. The prompt explains why BMI alone can be misleading for active individuals and which additional measurements provide better progress indicators.
Older adults and their caregivers assessing weight-related health risks. BMI interpretation shifts with age as muscle mass decreases and body fat distribution changes, and the prompt accounts for these age-specific factors.
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