BMI Calculator
Health Metrics & Macro Planner
Calculate key metrics and instantly generate your personalized nutrition strategy.
BMI
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Category
BMR
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Calories/Rest
TDEE
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Maintenance Cal
Daily Nutrition Goal
Your personalized macro plan will appear here after calculation.
Calculation Details & Health References
Body Mass Index (BMI)
BMI is a measure of body fat based on height and weight. It is calculated using the formula:
BMI = Weight (kg) / [Height (m) × Height (m)]
| BMI Range | Category |
|---|---|
| Less than 18.5 | Underweight (Abnormal) |
| 18.5 - 24.9 | Normal Weight (Healthy) |
| 25.0 - 29.9 | Overweight (Abnormal) |
| 30.0 and Greater | Obese (Abnormal) |
Basal Metabolic Rate (BMR)
BMR is the calories your body needs to function at rest. It is calculated using the accurate **Mifflin-St. Jeor Equation**.
Men: BMR = (10 × Weight) + (6.25 × Height) - (5 × Age) + 5
Women: BMR = (10 × Weight) + (6.25 × Height) - (5 × Age) - 161
*Where Weight is in **kg**, Height is in **cm**, and Age is in **years**.*
*Your personalized **BMR value** is displayed in the main results section above after calculation.*
Total Daily Energy Expenditure (TDEE)
TDEE is your BMR multiplied by an Activity Factor to estimate total daily calorie burn (Maintenance Calories).
| Activity Level | Factor |
|---|---|
| Sedentary (Little/no exercise) | 1.2 |
| Lightly Active (1-3 days/wk) | 1.375 |
| Moderately Active (3-5 days/wk) | 1.55 |
| Very Active (6-7 days/wk) | 1.725 |
| Extra Active (Hard exercise/job) | 1.9 |