Health & Fitness
BMI + Calorie Calculator
Calculate your Body Mass Index, ideal weight range, and daily calorie needs (BMR & TDEE) based on your activity level and goal — all in one place.
Your Details
Metric / Imperial
yrs
kg
cm
Your BMI
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UnderweightNormalOverweightObese
0
Ideal Weight Min
0
Ideal Weight Max
0
BMR (kcal/day)
Daily Calorie Needs
0
Maintain (TDEE)
0
Lose Weight
0
Gain Weight
0
Recommended Daily Calories for Your Goal
01How to Use This Calculator
Enter your age, gender, weight, and height, choose your activity level and goal, then click Calculate. You'll get your BMI category, a healthy weight range for your height, your BMR (calories burned at rest), and your total daily calorie target based on how active you are.
02Formula & Method
| Metric | Formula |
|---|---|
| BMI | Weight (kg) ÷ Height (m)² |
| Ideal Weight Range | BMI 18.5–24.9 × Height (m)² |
| BMR (Men) | 10×weight(kg) + 6.25×height(cm) − 5×age + 5 (Mifflin-St Jeor) |
| BMR (Women) | 10×weight(kg) + 6.25×height(cm) − 5×age − 161 |
| TDEE | BMR × Activity Multiplier (1.2 – 1.9) |
| BMI Range | Category |
|---|---|
| Below 18.5 | Underweight |
| 18.5 – 24.9 | Normal Weight |
| 25.0 – 29.9 | Overweight |
| 30.0 and above | Obese |
03Frequently Asked Questions
Is BMI accurate for everyone? ▼
BMI is a useful general screening tool but doesn't account for muscle mass, bone density, or body composition. Athletes and very muscular people may show a "high" BMI despite low body fat. It's a starting point, not a diagnosis.
What is BMR vs TDEE? ▼
BMR (Basal Metabolic Rate) is the calories your body burns at complete rest just to function. TDEE (Total Daily Energy Expenditure) adds your activity level on top of BMR — it's your actual daily calorie burn.
How many calories should I cut to lose weight? ▼
A common, sustainable approach is a 500 kcal/day deficit below your TDEE, which targets roughly 0.5 kg (about 1 lb) of weight loss per week. Very large deficits can be harder to sustain and may affect muscle mass and energy levels.
How many calories should I add to gain weight? ▼
A common approach is a 300–500 kcal/day surplus above TDEE, combined with resistance training, to gain weight gradually as lean mass rather than mostly fat.
Is this calculator a substitute for medical advice? ▼
No. This tool gives general estimates for healthy adults. If you have a medical condition, are pregnant, underweight, or have specific health goals, consult a doctor or registered dietitian before making changes to your diet.
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