BMI, ideal body weight, and daily calorie needs — all in one place.
Result: BMI = 22.86• Normal weight
BMI range
Category
Health risk
< 18.5
Underweight
Malnutrition risk
18.5–24.9
Normal weight
Low
25.0–29.9
Overweight
Moderate
≥ 30
Obese
High
Frequently Asked Questions
A BMI between 18.5 and 24.9 is considered normal or healthy weight for adults. Below 18.5 is underweight; 25–29.9 is overweight; 30 and above is obese.
BMI does not distinguish between fat and muscle. Athletes with high muscle mass may show a high BMI while having low body fat, making it a less accurate measure for them.
BMI = weight in kg ÷ (height in metres)². In US units: BMI = 703 × weight in lb ÷ (height in inches)².
No single formula is universally best. The Devine formula is most commonly used in clinical pharmacology (for drug dosing). BMI-based ranges (18.5–24.9) are widely accepted but don't account for muscle mass.
The Devine formula (1974) calculates ideal weight as 50 kg + 2.3 kg per inch above 5 feet for men, and 45.5 kg + 2.3 kg per inch for women. It is the most widely used formula in medicine, particularly for drug dosing.
Basal Metabolic Rate (BMR) is the number of calories your body needs to maintain basic functions at rest — breathing, circulation, and temperature regulation. It accounts for about 60–70% of total daily energy expenditure.
Total Daily Energy Expenditure (TDEE) is your BMR multiplied by an activity factor. It is the total calories you burn per day. A sedentary person's TDEE = 1.2 × BMR; a very active person's = 1.725 × BMR.
A deficit of 500 calories per day leads to roughly 0.45 kg (1 lb) of weight loss per week. Eat TDEE minus 500 calories daily. A deficit larger than 1,000 calories/day risks muscle loss and nutritional deficiencies.