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Enter your height, weight, and age to get instant BMI classification, daily calorie needs, and personalized ideal weight recommendations.
Calculate your exact Body Mass Index (BMI), daily calorie needs (TDEE/BMR), and ideal weight range. Includes an instant live cm to feet height converter and full BMI formula breakdown for men, women, and adults.
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Enter your height, weight, and age to get instant BMI classification, daily calorie needs, and personalized ideal weight recommendations.
Quickly convert height measurements between centimeters (cm) and feet + inches (ft/in). Click any preset to test popular heights like 5.5 feet in cm, 1 cm in feet, and more.
Reference table for common heights in centimeters, feet and inches, and decimal feet.
| Height in Feet & Inches | Decimal Feet | Centimeters (CM) | Meters (M) | Quick Action |
|---|---|---|---|---|
| 5 ft 0 in | 5.00 ft | 152.4 cm | 1.52 m | |
| 5 ft 2 in | 5.17 ft | 157.5 cm | 1.57 m | |
| 5 ft 4 in | 5.33 ft | 162.6 cm | 1.63 m | |
| 5 ft 6 in (5.5 ft) | 5.50 ft | 167.6 cm | 1.68 m | |
| 5 ft 7 in | 5.58 ft | 170.2 cm | 1.70 m | |
| 5 ft 8 in | 5.67 ft | 172.7 cm | 1.73 m | |
| 5 ft 9 in | 5.75 ft | 175.3 cm | 1.75 m | |
| 5 ft 10 in | 5.83 ft | 177.8 cm | 1.78 m | |
| 6 ft 0 in | 6.00 ft | 182.9 cm | 1.83 m | |
| 6 ft 2 in | 6.17 ft | 188.0 cm | 1.88 m |
World Health Organization international clinical guidelines for adult Body Mass Index.
| BMI Range (kg/m²) | Classification | BMI Prime | Associated Health Risk |
|---|---|---|---|
| Below 16.0 | Severe Thinness | < 0.64 | High (Nutritional deficiency, fatigue) |
| 16.0 – 16.9 | Moderate Thinness | 0.64 – 0.68 | Elevated risk of compromised immunity |
| 17.0 – 18.4 | Mild Thinness | 0.68 – 0.74 | Moderate health risk |
| 18.5 – 24.9 | Normal Weight (Optimal) | 0.74 – 1.00 | Lowest clinical risk |
| 25.0 – 29.9 | Overweight (Pre-obese) | 1.00 – 1.20 | Increased risk of cardiovascular strain |
| 30.0 – 34.9 | Obese Class I | 1.20 – 1.40 | High risk (Type 2 diabetes, hypertension) |
| 35.0 – 39.9 | Obese Class II | 1.40 – 1.60 | Very high health risk |
| 40.0 and above | Obese Class III (Morbid) | > 1.60 | Extremely high health risk |
Understand how BMI and daily calorie calculations work mathematically.
BMI = weight (kg) ÷ [height (m)]²
Example: For a weight of 70 kg and height of 175 cm (1.75 m):70 ÷ (1.75 × 1.75) = 70 ÷ 3.0625 = 22.86 BMI
BMI = [weight (lbs) ÷ height (inches)²] × 703
Example: For a weight of 154 lbs and height of 5'9" (69 inches):(154 ÷ 4,761) × 703 = 0.0323 × 703 = 22.74 BMI
Men: 10×W + 6.25×H - 5×A + 5
Women: 10×W + 6.25×H - 5×A - 161
Where W = weight in kg, H = height in cm, and A = age in years. Multiply BMR by activity factor (1.2 to 1.9) for Total Daily Energy Expenditure (TDEE).
5.5 feet equals 167.64 cm. Since 1 foot has 12 inches, 0.5 feet is 6 inches. Therefore, 5.5 feet represents 5 feet 6 inches. In meters, 5.5 ft is approximately 1.68 meters.
To convert centimeters to feet and inches manually:
For instance, 175 cm ÷ 2.54 = 68.89 inches = 5 feet 8.9 inches (approx 5'9").
The BMI formula is identical for adult men and women: BMI = weight (kg) ÷ height (m)². Although men and women naturally have different body fat distributions, WHO clinical ranges apply across all adults aged 18 and older.
A calorie calculator calculates your Total Daily Energy Expenditure (TDEE). Consuming roughly 500 fewer calories per day creates a 3,500-calorie deficit per week, which typically translates to 1 pound (0.45 kg) of fat loss per week in a safe, sustainable manner.
1 cm is equal to 0.0328084 feet or 0.393701 inches. To convert any cm measurement to decimal feet, multiply the centimeter value by 0.0328084.
BMI calculates mass relative to height, but cannot distinguish between dense muscle mass, body fat, or bone density. Muscular athletes often show an "Overweight" BMI despite very low body fat. Always pair BMI with waist circumference or body composition testing.