Weight Calculator
Find your healthy weight range by height, convert between kg, lbs, and stone, plan weight loss or gain, and calculate your BMI weight goal.
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Healthy Weight Range (BMI 18.5–24.9)
118.12–158.98
lbs | 53.58–72.11kg
Hamwi IBW
147.49 lbs
66.9 kg
Devine IBW
145.73 lbs
66.1 kg
Robinson IBW
143.96 lbs
65.3 kg
Miller IBW
145.66 lbs
66.1 kg
BMI healthy range is 53.58–72.11kg based on 170cm height
REFERENCE CHART
Healthy Weight Ranges by Height
BMI 18.5–24.9 range. Values shown in lbs and kg.
| Height | Healthy Range (lbs) | Healthy Range (kg) | Midpoint |
|---|---|---|---|
| 4'10" / 147cm | 89 – 119 lbs | 40.2 – 54.0kg | 104 lbs / 47.1kg |
| 5'0" / 152cm | 95 – 127 lbs | 43.0 – 57.8kg | 111 lbs / 50.4kg |
| 5'2" / 157cm | 101 – 136 lbs | 45.9 – 61.8kg | 119 lbs / 53.8kg |
| 5'4" / 163cm | 108 – 145 lbs | 48.9 – 65.8kg | 126 lbs / 57.3kg |
| 5'6" / 168cm | 115 – 154 lbs | 52.0 – 70.0kg | 134 lbs / 61.0kg |
| 5'8" / 173cm | 122 – 164 lbs | 55.2 – 74.3kg | 143 lbs / 64.7kg |
| 5'10" / 178cm | 129 – 174 lbs | 58.5 – 78.7kg | 151 lbs / 68.6kg |
| 6'0" / 183cm | 136 – 184 lbs | 61.9 – 83.3kg | 160 lbs / 72.6kg |
| 6'2" / 188cm | 144 – 194 lbs | 65.4 – 88.0kg | 169 lbs / 76.7kg |
| 6'4" / 193cm | 152 – 205 lbs | 68.9 – 92.8kg | 178 lbs / 80.9kg |
⚠ BMI Has Limitations — Muscle Weighs More Than Fat
A muscular athlete can have a BMI of 27 (technically "overweight") with very low body fat. A sedentary person may have a "normal" BMI but high body fat percentage. BMI is a population screening tool, not a personal diagnosis. Waist circumference, body fat %, and metabolic markers give a more complete picture.
🍎 Calories & Weight Loss
1 pound of body fat ≈ 3,500 calories. To lose 1 lb/week, create a 500 cal/day deficit. To lose 2 lbs/week, a 1,000 cal/day deficit — generally the maximum recommended for sustainable loss. Never go below 1,200 cal/day (women) or 1,500 cal/day (men) without medical supervision. Very low calorie diets cause muscle loss, nutrient deficiencies, and adaptation (slowing metabolism).
🏃 Exercise & Weight
Exercise burns calories and builds muscle but contributes modestly to weight loss alone — a 30-minute run burns ~300 calories, roughly one small meal's worth. The real benefit is the combination: calorie deficit through diet plus exercise to maintain muscle mass and metabolic rate. Resistance training is especially important during weight loss — it preserves lean muscle mass, which burns more calories at rest than fat tissue, and prevents the metabolism slowdown that occurs with diet-only weight loss.
How to Calculate Healthy Weight by Height
Healthy weight is most commonly defined using BMI (Body Mass Index), though several clinical formulas also exist. Each has different strengths depending on what you're using the information for.
BMI Method (Common)
BMI = weight (kg) ÷ height (m)² OR 703 × weight (lbs) ÷ height (inches)²
Healthy weight range from BMI 18.5–24.9: Min = 18.5 × height(m)², Max = 24.9 × height(m)²
Example: 5'9" (175.3 cm = 1.753 m) → Min = 18.5 × 1.753² = 56.8 kg, Max = 24.9 × 1.753² = 76.5 kg (≈125–169 lbs)Ideal Body Weight Formulas
Hamwi (1964): Men: 48.0 kg + 2.7 kg per inch over 5 ft. Women: 45.5 kg + 2.2 kg per inch over 5 ft.
Devine (1974): Men: 50.0 kg + 2.3 kg per inch over 5 ft. Women: 45.5 kg + 2.3 kg per inch over 5 ft.
Robinson (1983): Men: 52.0 kg + 1.9 kg per inch over 5 ft. Women: 49.0 kg + 1.7 kg per inch over 5 ft.
Miller (1983): Men: 56.2 kg + 1.41 kg per inch over 5 ft. Women: 53.1 kg + 1.36 kg per inch over 5 ft.
Example (5'9" man, Hamwi): 48.0 + 2.7 × 9 = 72.3 kg ≈ 159.4 lbsWeight Loss Calorie Formula
Weight to Lose (lbs) × 3,500 = Total calorie deficit needed
Total deficit ÷ (weeks × 7) = Daily calorie deficit
Example: Lose 20 lbs in 20 weeks → Total deficit = 20 × 3,500 = 70,000 calories → 70,000 ÷ 140 days = 500 calories/dayWeight Units — Pounds, Kilograms & Stone
Weight is measured in different units around the world, which can cause confusion when comparing body weight across countries or reading medical information from other regions.
Kilograms (kg) — International Standard
The kilogram is the SI unit of mass and the standard for medical and scientific contexts worldwide. Most countries use kg for body weight in medical records, for drug dosing, and on scales. 1 kg = 2.20462 lbs = 0.157473 stone.
Pounds (lbs) — United States
Pounds are the primary unit for body weight in the United States. A pound equals 0.453592 kg. Body weight in the US is typically expressed in whole pounds (e.g., 165 lbs). Medically, drug dosing in the US often requires converting lbs to kg first: kg = lbs × 0.453592.
Stone (st) — United Kingdom & Ireland
Stone is used predominantly in the UK and Ireland for body weight. 1 stone = 14 pounds = 6.35029 kg. Weight is commonly expressed as "X stone Y pounds" — for example, "11 stone 4 pounds" means 158 lbs / 71.7 kg. To convert kg to stone: divide by 6.35029; remainder × 14 for remaining pounds.
BMI Categories
BMI < 18.5 = Underweight | Normal weight BMI 18.5-24.9 | Overweight BMI 25.0-29.9 | Obese (Class I) BMI 30.0-34.9 | Obese (Class II) BMI 35.0-39.9 | Obese (Class III) BMI ≥ 40.0
Note: BMI thresholds differ for Asian populations — health risks increase at BMI ≥ 23 (overweight) and ≥ 27.5 (obese) in some guidelines.— FAQ