Ideal Weight Calculator
Find your ideal weight using 5 evidence-based formulas, adjusted for your body frame size — with a height-ruler visual and a comparison against your current weight.
5
FORMULAS USED
±10%
FRAME ADJUSTED
Free
ALWAYS
📏 Height Ruler
170 cm
5'7"
Underweight zone
Healthy weight zone
Overweight zone
Obese zone
Your Details
Your Ideal Weight
65.9 kg
Medium Frame · 5'7" (170cm)
- Formula Average
- 65.9 kg
- WHO/BMI Range
- 53.5 kg – 72.0 kg
📊 Ideal Weight by Formula — All 5 Formulas
66.7 kg
Hamwi
65.9 kg
Devine
65.2 kg
Robinson
66.0 kg
Miller
53.5 kg – 72.0 kg
WHO Range
How Ideal Weight Is Calculated
An ideal weight calculator uses your height, sex, and body frame to estimate a single target weight — distinct from BMI, which returns a broader healthy range. These point formulas were originally developed by clinicians for drug dosing and fitness benchmarks, not as strict goals. For the range-based view instead of a single number, see our healthy weight calculator, and for a body-composition check pair this with our BMI calculator.
The 5 Formulas Used
Hamwi (1964): Male: 48.0 kg + 2.7 kg per inch over 5 ft · Female: 45.5 kg + 2.2 kg per inch over 5 ftDevine (1974): Male: 50.0 kg + 2.3 kg per inch over 5 ft · Female: 45.5 kg + 2.3 kg per inch over 5 ftRobinson (1983): Male: 52.0 kg + 1.9 kg per inch over 5 ft · Female: 49.0 kg + 1.7 kg per inch over 5 ftMiller (1983): Male: 56.2 kg + 1.41 kg per inch over 5 ft · Female: 53.1 kg + 1.36 kg per inch over 5 ftWHO/BMI Range: Weight = BMI × Height(m)² for BMI 18.5–24.9Body frame adjustment: Small frame ×0.90 · Medium frame ×1.00 · Large frame ×1.10, applied to the average of the first 4 formulas.
No single formula perfectly fits every body type. BMI-style formulas don't distinguish muscle from fat, so a lean, muscular person can sit well above these numbers while being perfectly healthy — treat the result as a general guideline, not a strict target.
🎯
Set a Realistic Goal
Aim for the midpoint of your formula range first, not the lower bound. Sustainable weight management beats rapid fluctuations.
🔥
Caloric Balance
A deficit of 500 kcal/day produces roughly 0.5kg/week of fat loss. Use our calorie calculator to find your target.
💪
Build Lean Mass
Resistance training increases muscle mass, which raises your metabolic rate — you may gain weight but look leaner.
📈
Track Weekly Trends
Weigh yourself at the same time each week. Daily fluctuations of 1-3kg are normal and don't reflect real fat change.
— FAQ