Ideal Weight Calculator

Category: Fitness
- April 04, 2025
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Calculate your ideal weight based on different formulas using your height, gender, and body frame. This calculator includes multiple scientifically-based formulas for comparison.

Personal Information

Height

Formula Selection

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About Ideal Weight

The concept of "ideal weight" refers to a weight range that is associated with optimal health outcomes based on a person's height, gender, age, and body frame. Various formulas have been developed to estimate this range.

Factors Affecting Ideal Weight
  • Height: Taller individuals generally have higher ideal weights.
  • Gender: Males typically have higher ideal weights due to greater muscle mass and bone density.
  • Body Frame: People with larger skeletal frames may have higher ideal weights.
  • Age: Optimal weight can change with age due to changes in muscle mass and metabolism.
  • Muscle Mass: Individuals with higher muscle mass may be healthy at weights above formula estimates.
Limitations of Ideal Weight Formulas
  • Most formulas were developed in the mid-20th century and may not reflect current health research.
  • They don't account for differences in body composition, ethnicity, or individual metabolic factors.
  • Athletic individuals with high muscle mass may be classified as "overweight" despite being healthy.
  • Weight alone is not a comprehensive indicator of health - other factors like blood pressure, cholesterol levels, and overall fitness are important.

Ideal Weight Calculator Guide

What Is the Ideal Weight Calculator?

The Ideal Weight Calculator is a straightforward tool designed to estimate your ideal weight based on your height, age, and gender. By employing various scientific formulas, it provides a range of weight recommendations tailored to your inputs. This tool is great for setting fitness goals, evaluating general health, or simply understanding your body’s ideal weight range.

How Does It Work?

The calculator uses five recognised formulas to determine your ideal weight:

  1. Robinson (1983)
  2. Miller (1983)
  3. Devine (1974)
  4. Hamwi (1964)
  5. Healthy BMI Range

Each formula is customised to consider specific factors such as height and gender, giving a detailed perspective on what your ideal weight could be.

Key Features

  • Two Unit Systems: Choose between US (feet/inches) or Metric (centimetres) units.
  • Multiple Calculations: Get results from five different scientific formulas.
  • Easy to Use: Input your age, gender, and height, then view results instantly.
  • Reset Option: Quickly clear all inputs and start anew.

How to Use the Calculator

  1. Select Your Unit System:
  2. Choose US Units for height in feet and inches.

  3. Choose Metric Units for height in centimetres.

  4. Input Your Details:

  5. Age: Enter a value between 2 and 80 years.
  6. Gender: Select Male or Female.

  7. Height:

    • For US Units, enter height in feet and inches.
    • For Metric Units, enter height in centimetres.

  8. Click Calculate: The tool will show your ideal weight based on each formula.

  9. View Results: Check the table for weight values from each formula.

  10. Clear Inputs (Optional): Use the Clear button to reset all fields.

Explanation of Formulas

Here’s a breakdown of each formula the calculator uses to determine ideal weight:

1. Robinson Formula (1983)

This formula adjusts for height above 152 cm, providing gender-specific ideal weights.

  • For Men:
    Ideal weight (kg) = 52 + 1.9 × (height in cm − 152)
  • For Women:
    Ideal weight (kg) = 49 + 1.7 × (height in cm − 152)

2. Miller Formula (1983)

Similar to Robinson, the Miller formula calculates ideal weight with slightly lower increments.

  • For Men:
    Ideal weight (kg) = 56.2 + 1.41 × (height in cm − 152)
  • For Women:
    Ideal weight (kg) = 53.1 + 1.36 × (height in cm − 152)

3. Devine Formula (1974)

Originally developed for medical purposes, the Devine formula is still a common standard in healthcare.

  • For Men:
    Ideal weight (kg) = 50 + 2.3 × (height in inches − 60)
  • For Women:
    Ideal weight (kg) = 45.5 + 2.3 × (height in inches − 60)

4. Hamwi Formula (1964)

The Hamwi formula is one of the earliest methods to calculate ideal weight and remains widely used.

  • For Men:
    Ideal weight (kg) = 48 + 2.7 × (height in cm − 152)
  • For Women:
    Ideal weight (kg) = 45.5 + 2.2 × (height in cm − 152)

5. Healthy BMI Range

This formula calculates a healthy weight range based on Body Mass Index (BMI) standards.

  • Formula:
    Weight (kg) = BMI × (height in metres)²
    Healthy weight range = 18.5 × (height in metres)² to 24.9 × (height in metres)²

Example of Results

Let’s say you input the following:

  • Age: 30
  • Gender: Female
  • Height: 170 cm

Your results might look like this:

| Formula | Ideal Weight (kg) | |---------------------|-------------------| | Robinson (1983) | 57.8 | | Miller (1983) | 59.2 | | Devine (1974) | 58.0 | | Hamwi (1964) | 56.8 | | Healthy BMI Range | 53.5 - 72.3 |

Why Use This Calculator?

The Ideal Weight Calculator provides a comprehensive view of your potential healthy weight range. By comparing multiple formulas, it offers a detailed and balanced perspective, helping you make informed decisions about your health and fitness goals.

Tips for Best Results

  • Input accurate height and age for precise calculations.
  • Use the Healthy BMI Range for a flexible understanding of weight variation.
  • Consult with a healthcare professional for further analysis.