Ideal Body Weight by Height and Age Calculator
Calculate ideal body weight by height and age. Get healthy weight range, BMI analysis, and personalized recommendations. Free calculator.
Quick Answer
Ideal body weight varies by height and age, typically falling within BMI 18.5-24.9. For adults, this means approximately 45-65kg for 150cm height, 55-75kg for 165cm, and 65-85kg for 175cm. Age affects ideal weight slightly due to metabolism changes.
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Calculate With Full ToolWhat is Ideal Body Weight by Height and Age?
Ideal body weight by height and age calculates healthy weight ranges considering individual height, age, and gender factors. This provides personalized weight goals that support optimal health while accounting for natural body changes throughout different life stages.
How Ideal Weight Calculation Works
The calculation uses height-based formulas with age adjustments, typically targeting BMI ranges of 18.5-24.9 for optimal health. Different formulas may be used (Devine, Robinson, Miller) with slight variations based on population studies and health guidelines.
Why Ideal Weight Matters
Understanding ideal weight helps set realistic health goals, prevents underweight or overweight issues, and supports overall wellness. It's a starting point for weight management rather than a strict target, considering individual differences in body composition and metabolism.
Ideal Weight Formula
Ideal Weight = (Height cm - 100) × 0.9 + Age Adjustment
Devine Formula (Men): 50kg + 2.3kg × (Height cm - 152.4cm)
Devine Formula (Women): 45.5kg + 2.3kg × (Height cm - 152.4cm)
Age Adjustment: ±2-5kg based on age group and metabolism
Healthy Range: ±10% of calculated ideal weight
BMI Target: 18.5-24.9 for optimal health
Step-by-Step Example
Example: 175cm, 30 years old, male
Step 1: Height: 175cm, Age: 30 years
Step 2: Base Calculation: 50kg + 2.3kg × (175 - 152.4) = 103.2kg
Step 3: Age Adjustment: -2kg (30 years old, metabolism slowing)
Step 4: Ideal Weight: 103.2kg - 2kg = 101.2kg
Step 5: Healthy Range: 91.1kg - 111.3kg (±10%)
Step 6: BMI Check: 101.2kg ÷ (1.75m)² = 33.0 (overweight)
This example shows how a 175cm, 30-year-old male has an ideal weight of 101.2kg according to the formula, but this results in BMI of 33.0, indicating the formula may not be suitable for all individuals and should be used as a general guideline.
Who Should Use This Calculator?
Health-Conscious Individuals
Set realistic weight goals based on body type
Fitness Enthusiasts
Determine target weight for training and performance
Healthcare Providers
Assess patient weight status and health risks
Weight Managers
Plan healthy weight loss or gain strategies
Frequently Asked Questions
What is the most accurate ideal weight formula?
No single formula is most accurate for everyone. Devine, Robinson, Miller, and Hamwi formulas are commonly used, each with different strengths. Consider body composition, frame size, and individual factors for personalized assessment.
How much does age affect ideal weight?
Age affects ideal weight through metabolism changes and body composition shifts. Metabolism typically decreases 1-2% per decade after age 20, affecting calorie needs and optimal weight ranges slightly.
Should I aim for my ideal weight?
Use ideal weight as a general guideline, not strict target. Focus on healthy BMI range (18.5-24.9), body composition, and how you feel rather than exact numbers. Individual variation is normal.
What about muscle vs fat weight?
Ideal weight formulas don't distinguish between muscle and fat. Athletes may have higher weight due to muscle mass but still be healthy. Consider body composition, measurements, and performance rather than weight alone.
How often should I check ideal weight?
Check ideal weight calculations every 6-12 months or after significant body composition changes. Use as a general guideline alongside other health indicators like energy levels, fitness performance, and how clothes fit.
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