BMI (Body Mass Index) is a screening measure calculated from height and weight. It can help categorize weight status, but it does not directly measure body fat or health.

How are calorie needs estimated?

This calculator estimates BMR using the Mifflin–St Jeor equation and multiplies it by an activity factor to estimate TDEE (total daily energy expenditure).

Is the healthy weight range universal?

The healthy weight range here is based on BMI 18.5–24.9, which is a common general guideline for adults. Individual health context can vary.

Can athletes have a high BMI but be healthy?

Yes. BMI does not distinguish muscle from fat. People with high muscle mass can have a higher BMI without having excess body fat.

Is this calculator medical advice?

No. This tool is for educational purposes only. For personalized guidance, consult a qualified healthcare professional.

Understand Your BMI & Daily Calorie Needs (Educational)

Use this tool to calculate BMI (Body Mass Index), a healthy weight range based on common BMI categories, and estimate your daily energy needs: BMR (resting calories) and TDEE (maintenance calories).

This page is not medical advice. BMI is a screening measure and may be misleading for very muscular people, older adults, or certain health conditions. For personalized guidance, consult a qualified professional.

More: All health tools

BMI & Calorie Needs Calculator

BMI + healthy weight range + BMR (Mifflin–St Jeor) + TDEE (activity). Educational use only — not medical advice.

Units: Metric

Inputs

Sex Used for BMR estimation.

Age For adults (18+ recommended).

Height In centimeters.

Weight In kilograms.

Activity level Used to estimate TDEE (maintenance calories).

Tip: press Enter in any field.

Reminder: Calorie estimates can vary based on body composition, sleep, stress, and health conditions. Use this as a starting point, then adjust based on real-world progress.

Results

Waiting for input

BMI

— kg/m²

BMI = weight / height²

Healthy weight range

— kg

Based on BMI 18.5–24.9 (common adult guideline).

BMR (resting)

— kcal/day

Mifflin–St Jeor estimate.

TDEE (maintenance)

— kcal/day

BMR × activity factor.

Goal	Calories/day	Notes
Enter values and click Calculate.