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Ideal Weight Calculator

Calculate your ideal body weight using proven medical formulas. Get personalized healthy weight ranges based on your height, gender, age, and frame size.

How to Calculate Ideal Weight Scientifically

Your ideal weight is an estimate of a healthy weight range for your height, calculated using validated medical formulas developed by researchers over decades. Unlike simple BMI calculations, ideal weight formulas account for gender differences, age, and body frame size to provide more personalized results.

This calculator uses four established formulas: Robinson (1983), Miller (1983), Devine (1974), and Hamwi (1964). Each formula was developed using different population data and for different purposes—some for medical dosing, others for insurance calculations. By averaging all four formulas, you get the most reliable estimate of your ideal weight range.

Understanding your ideal weight helps you set realistic health goals. However, remember that body composition matters more than weight alone. Athletes with high muscle mass may weigh more than their "ideal weight" but still be very healthy. For a complete picture, consider using our BMI Calculator and Lean Body Mass Calculator to understand your body composition. Read our comprehensive guide to learn more about ideal weight formulas and how to use them effectively.

👤 Gender

Enter your height in centimeters

Your Ideal Weight

Average Ideal Weight
65.9 kg
Healthy Weight Range (BMI 18.5-24.9)
53.5 - 72 kg

Multiple Formula Results

Robinson Formula (1983)
65.2 kg
Miller Formula (1983)
66 kg
Devine Formula (1974)
65.9 kg
Hamwi Formula (1964)
66.7 kg

📋 Recommendations

  • Ideal weight is a general guideline, not an absolute target
  • Body composition (muscle vs fat) matters more than weight alone
  • Consult healthcare provider for personalized recommendations
  • Focus on healthy habits rather than just achieving a number

Ideal Weight Comparison Table (for 170 cm, Male, Age 30)

Compare results from four established medical formulas

Formula / MethodResult (kg)Notes
Robinson(1983)ℹ️Developed for general population, widely used in clinical settings.
52 + 1.9 × (inches over 5 ft)
65.2Developed for general population, widely used in clinical settings.
Miller(1983)ℹ️Similar to Robinson, with slight variations in coefficients.
56.2 + 1.41 × (inches over 5 ft)
66.0Similar to Robinson, with slight variations in coefficients.
Devine(1974)ℹ️One of the earliest formulas, originally for medication dosing.
50 + 2.3 × (inches over 5 ft)
65.9One of the earliest formulas, originally for medication dosing.
Hamwi(1964)ℹ️Classic formula, one of the first ideal weight calculations.
48 + 2.7 × (inches over 5 ft)
66.7Classic formula, one of the first ideal weight calculations.
Average of Formulas65.9Mean of all four formulas above
BMI Healthy Range53.5–72Based on BMI 18.5–24.9 for your height

BMI Range Visualization

Average: 65.9 kg
53.5 kg72 kg
Underweight (<18.5)
Healthy (18.5–24.9)
Overweight (25–29.9)
Obese (≥30)

Understanding Ideal Body Weight

Ideal body weight formulas provide estimates based on height and gender. These are guidelines developed for medical and insurance purposes, not absolute targets.

The Four Main Formulas

  • Robinson (1983): Updated formula based on population data
  • Miller (1983): Similar accuracy to Robinson
  • Devine (1974): Originally for drug dosing calculations
  • Hamwi (1964): Quick estimation method

Important Considerations

  • Body composition matters more than weight alone
  • Muscle weighs more than fat by volume
  • Athletes may be "overweight" but healthy
  • Bone density varies between individuals
  • Age affects ideal weight (slight increase with age is normal)

Beyond the Number

  • Focus on body composition, not just weight
  • Consider your fitness level and muscle mass
  • Monitor how you feel and perform
  • Consult healthcare providers for personalized advice

Healthy Weight Calculator: Understanding Your Results

Your ideal weight is calculated using four validated medical formulas: Robinson (1983), Miller (1983), Devine (1974), and Hamwi (1964). Each formula provides a slightly different estimate because they were developed using different population data and for different purposes. The average of all four formulas gives you the most reliable estimate.

How Ideal Weight Relates to BMI and Lean Body Mass

Ideal weight is closely related to BMI (Body Mass Index), which uses a simple height-to-weight ratio. However, ideal weight formulas account for gender differences and frame size, making them more personalized than BMI alone.

For a more complete picture of your body composition, consider using our Lean Body Mass Calculator, which distinguishes between muscle mass and fat mass. This is especially important for athletes or individuals with higher muscle mass, as they may weigh more than their "ideal weight" but still be very healthy.

Example Calculation: Understanding the Numbers

Example: A 30-year-old male, 175 cm (5'9") tall, with a medium frame size:

  • Robinson Formula: 72.5 kg (160 lbs)
  • Miller Formula: 73.2 kg (161 lbs)
  • Devine Formula: 75.0 kg (165 lbs)
  • Hamwi Formula: 74.5 kg (164 lbs)
  • Average Ideal Weight: 73.8 kg (162.5 lbs)
  • Healthy BMI Range (18.5-24.9): 57-76 kg (125-168 lbs)

Notice how the ideal weight (73.8 kg) falls within the healthy BMI range. The slight variation between formulas (2-3 kg) is normal and reflects the natural diversity in body composition.

When Ideal Weight May Not Apply

Ideal weight formulas are estimates based on average populations. They may not be accurate for:

  • Athletes and bodybuilders: Higher muscle mass means you may weigh more than ideal weight but still be very healthy. Use body composition analysis instead.
  • Seniors (65+): Slight weight gain with age can be protective against frailty. Consult with healthcare providers.
  • Individuals with medical conditions: Certain conditions may require different weight targets.
  • Pregnant or postpartum women: Weight recommendations change during and after pregnancy.

Next Steps: Complete Your Health Picture

Ideal weight is just one piece of the health puzzle. For a comprehensive assessment, consider:

  • Check your BMI to see where you fall in the healthy weight range
  • Calculate your lean body mass to understand muscle vs. fat composition
  • Use our Body Fat Calculator to determine your body fat percentage
  • Consult with healthcare providers for personalized health goals

Frequently Asked Questions

Calculate your ideal body weight based on height, age, gender, and body frame using our free ideal weight calculator. Compare Devine, Robinson, Miller, and Hamwi formulas to determine target weight and healthy weight range. Perfect for setting realistic weight goals, understanding healthy weight ranges, and planning weight management strategies.

✅ Common Use Cases

  • Determine ideal weight for your height and frame
  • Set realistic weight loss or gain goals
  • Understand healthy weight ranges
  • Compare different ideal weight formulas

💡 Key Benefits

  • Multiple formula comparisons (Devine, Robinson, Miller, Hamwi)
  • Body frame size consideration
  • Gender and age-specific calculations
  • Healthy weight range recommendations

How to Use Ideal Weight Calculator

1️⃣

Choose your calculator

Navigate to the Ideal Weight Calculator page and familiarize yourself with the input fields.

2️⃣

Enter your values

Input your data into the calculator fields. All inputs are validated in real-time.

3️⃣

View instant results

The calculator instantly displays comprehensive results with detailed breakdowns.

🔬 How Ideal Weight Calculator Works

📐 Formula

Ideal Weight Calculator Calculation Formula: The Ideal Weight Calculator employs validated mathematical formulas and computational algorithms specifically designed for health and fitness calculations involving body metrics, nutrition, and wellness tracking. The calculation process takes your input values and applies industry-standard formulas to produce accurate, reliable results. Each input parameter influences the final result according to established mathematical principles, ensuring consistency and accuracy across all calculations.

Variables:

  • Input Values: The specific data points you provide to the Ideal Weight Calculator, such as amounts, rates, measurements, or other relevant parameters needed for the calculation
  • Calculation Function: The mathematical formula or algorithm that processes your inputs according to established principles and industry standards
  • Result: The calculated output value, which may include primary results, intermediate calculations, and detailed breakdowns to help you understand the computation

📋 Step-by-Step Calculation Process

1

Gather Required Information

Before using the Ideal Weight Calculator, identify all the values you need for the calculation. Review the input fields to understand what information is required, including units of measurement, time periods, or other relevant parameters. Having accurate input data ensures reliable results.

2

Enter Your Values

Input your information into the Ideal Weight Calculator fields. The calculator provides clear labels, helpful placeholders, and real-time validation to guide you. As you type, the calculator checks for valid inputs and highlights any errors immediately, ensuring you enter correct values before calculation.

3

Review and Verify Inputs

Double-check all entered values for accuracy. Verify that numbers are correct, units match (e.g., dollars vs. cents, months vs. years), and all required fields are filled. The calculator will alert you to any missing or invalid inputs before proceeding with calculations.

4

Calculate and Analyze Results

The Ideal Weight Calculator processes your inputs instantly using validated formulas and algorithms. Results appear immediately with detailed breakdowns, intermediate calculations, and clear explanations. Review all result metrics to fully understand the calculation and its implications for your specific situation.

5

Interpret and Apply Results

Use the detailed result breakdowns and explanations to understand what the calculations mean for your situation. Compare different scenarios by adjusting inputs, and use the insights gained to make informed decisions. The calculator provides context and explanations to help you interpret results accurately.

⌨️ Understanding Input Fields

Primary Input ValuesVaries by calculator type

The main data points required for the Ideal Weight Calculator calculation. These values typically include amounts, rates, time periods, measurements, or other parameters specific to health and fitness calculations involving body metrics, nutrition, and wellness tracking. Each input field is clearly labeled with its purpose and expected format.

💡 Tip:Ensure all inputs are accurate, use consistent units throughout, and double-check decimal places. The calculator validates inputs in real-time and provides helpful error messages if values are invalid or outside expected ranges.
Additional ParametersVaries

Optional or secondary inputs that may affect the calculation results. These parameters allow you to customize the calculation for your specific needs and compare different scenarios.

💡 Tip:Experiment with different parameter values to see how they affect results. This helps you understand the relationship between inputs and outputs and make more informed decisions.

📊 Understanding Your Results

The Ideal Weight Calculator delivers comprehensive calculation results with detailed breakdowns and clear explanations. Each result metric is labeled and explained to help you understand not just what the numbers are, but what they mean for your specific situation. The calculator provides context, comparisons, and actionable insights based on health and fitness calculations involving body metrics, nutrition, and wellness tracking principles, enabling you to make informed decisions with confidence.

Key Metrics Explained:

  • Primary Calculation Result: The main output value from the Ideal Weight Calculator, representing the primary calculation you requested. This result is calculated using validated formulas and algorithms, ensuring accuracy and reliability. Understanding this primary result helps you make informed decisions about health and fitness calculations involving body metrics, nutrition, and wellness tracking.
  • Supporting Calculations: Additional metrics and breakdowns that provide context and deeper insights into the Ideal Weight Calculator results. These supporting calculations help you understand the complete picture, including intermediate values, percentages, comparisons, and other relevant metrics that enhance your understanding of the primary result.
  • Detailed Breakdowns: Comprehensive explanations and step-by-step breakdowns showing how the Ideal Weight Calculator arrived at each result. These breakdowns help you verify calculations, understand the underlying formulas, and gain confidence in the results for health and fitness calculations involving body metrics, nutrition, and wellness tracking.

What to Do Next:

  • Review the results carefully to ensure they match your expectations
  • Use the results to make informed decisions or plan next steps
  • Experiment with different input values to see how they affect results
  • Share or save results for future reference if needed

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