Ideal Weight Calculator 2025

Enter Your Details

Unit System

Gender

Age (years)

Valid range: 18-100 years

Height (cm)

Valid range: 100-250 cm (3'3" - 8'2")

Body Frame Size

Wrap fingers around wrist: overlap = small, touch = medium, gap = large

Your Ideal Weight

Recommended Ideal Weight

65.9 kg

Based on your height (170 cm / 5'7")

📊 Healthy Weight Range

59.4 - 72.5 kgMedium Frame

🎯 BMI-Based Healthy Range (18.5-24.9)

53.5 - 72.0 kgIdeal: 62.7 kg

All Formulas Comparison

Devine FormulaMost Used65.9 kg

Robinson Formula65.2 kg

Miller Formula66.0 kg

Hamwi Formula66.7 kg

Broca Index70.0 kg

💡 Understanding Ideal Weight Formulas

Devine Formula (1974)

Most widely used in clinical settings

Male: 50 + 2.3 × (height in - 60)

Female: 45.5 + 2.3 × (height in - 60)

Robinson Formula (1983)

Modified Devine formula

Male: 52 + 1.9 × (height in - 60)

Female: 49 + 1.7 × (height in - 60)

BMI-Based Method

Based on healthy BMI range

Formula: BMI × height²

Healthy BMI: 18.5 - 24.9

🎯 Important Considerations

✅ These formulas work best for:

• Adults aged 18-65
• General fitness goals
• Getting a baseline target

⚠️ Consider consulting a doctor if:

• You're an athlete or bodybuilder
• You have health conditions
• You're pregnant or breastfeeding

What is Ideal Body Weight?

Ideal Body Weight (IBW) is a weight range considered healthy for a person based on their height, gender, and sometimes body frame. It's used in clinical settings for drug dosing, nutritional assessment, and setting realistic weight goals.

Unlike BMI which only considers height and weight, ideal weight formulas account for gender differences in body composition. Our calculator uses 5 validated formulas to give you a comprehensive view of your healthy weight range.

How to Use

1Select your unit system (Metric or Imperial)
2Choose your gender (formulas differ for men/women)
3Enter your height accurately
4Select your body frame size (use wrist test)
5View your ideal weight from all formulas

Ideal Weight Formulas Explained

Formula	Male	Female	Notes
Devine (1974)	50 + 2.3×(in-60)	45.5 + 2.3×(in-60)	Most used clinically
Robinson (1983)	52 + 1.9×(in-60)	49 + 1.7×(in-60)	Less steep curve
Miller (1983)	56.2 + 1.41×(in-60)	53.1 + 1.36×(in-60)	Higher base weight
Hamwi (1964)	48 + 2.7×(in-60)	45.5 + 2.2×(in-60)	Quick clinical estimate
BMI Method	18.5-24.9 × height²	18.5-24.9 × height²	WHO standard range

*Height measured in inches from 60" (5 feet). Results in kg.

Frequently Asked Questions

What is the most accurate ideal weight formula?

The Devine Formula (1974) is most commonly used in clinical settings for drug dosing calculations. However, for general health purposes, the BMI-based method (18.5-24.9 range) is considered most practical. Our calculator shows all formulas so you can see the range and average.

Does body frame size affect ideal weight?

Yes, body frame size significantly affects ideal weight. People with larger frames naturally carry more muscle and bone mass. You can determine your frame size by wrapping your thumb and finger around your wrist: if they overlap, you have a small frame; if they touch, medium; if there's a gap, large.

Why do different formulas give different results?

Each formula was developed using different population samples and methodologies. Devine (1974) was created for calculating drug dosages. Robinson and Miller modified it for general use. Hamwi was developed for quick clinical estimates. The differences typically range from 2-5 kg, which is why we show an average.

Is ideal weight the same for men and women?

No, ideal weight formulas differ by gender because men typically have more muscle mass and denser bones. For the same height, men's ideal weight is usually 5-10% higher than women's. This is reflected in all the formulas used in our calculator.

Are these formulas accurate for Indians and Asians?

Standard ideal weight formulas were developed using Western populations. For Asians, including Indians, who tend to have a higher body fat percentage at lower weights, the BMI-based healthy range of 18.5-22.9 might be more appropriate than the standard 18.5-24.9.

How is ideal weight different from target weight?

Ideal weight is a scientifically calculated range based on height and gender. Target weight is your personal goal, which may be higher (for muscle gain) or lower (for fat loss) depending on your fitness objectives, body composition, and health considerations.