BMI
—
Enter valid weight and height.
Ideal weight range (BMI 18.5–24.9): —
Estimated daily calories (TDEE)
— kcal/day
Rough weight-loss target (~500 kcal deficit): — kcal/day
BMI & daily calorie calculator
Mifflin–St Jeor equation for estimated energy needs — not medical advice.
Screening, not diagnosis
BMI is a broad screening metric that can help you understand whether your weight falls into a common reference band. It does not measure body fat directly, and athletes, people with high muscle mass, or unusual body shapes can fall outside the simple classification logic.
Calorie estimates are directional
Daily calorie outputs are best used as starting points for planning meals or setting a maintenance target. Age, activity level, recovery, medication, and health conditions all influence real energy needs, so use the number as a guide rather than a prescription.
Understanding BMI categories
Under 18.5 is underweight, 18.5–24.9 is normal for screening purposes, 25–29.9 is overweight, and 30+ is obese — athletes with high muscle mass may be misclassified.
Health disclaimers
BMI is a screening metric, not a diagnosis. Calorie targets are simplified — athletes, pregnancy, and medical conditions need professional guidance.
How TDEE is framed
Activity multipliers approximate daily burn on top of basal metabolic estimates; refine intake with a coach or clinician.
Quick start
- Enter height and weight — Use the units shown on the page and fill in age, sex, and activity level.
- Read BMI category — The tool shows BMI, category label, and an illustrative ideal weight band.
- Check calorie estimate — TDEE is a simplified daily burn estimate — not medical advice.