🌿 Health → Ideal Weight Calculator
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Ideal Weight Calculator
Calculate your ideal body weight based on your height, age, and gender using proven medical formulas.

// Your Details

cm
kg
Ideal Weight Range
0 kg
Hamwi Formula
— kg
Devine Formula
— kg
Difference
— kg
⚠️ Disclaimer: This tool is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before making health decisions.

What is this Tool?

The Ideal Weight Calculator estimates your healthy target weight based on height, gender, and body frame size using established medical formulas. Unlike BMI which gives a single number, ideal weight calculations provide a target range, making them more useful for setting realistic health goals. This tool uses multiple formulas — Hamwi and Devine — for a comprehensive estimate.

How to Use This Calculator

1
Enter your height in centimetres.
2
Select your gender — formulas differ for males and females.
3
Enter your current weight to see how far you are from the ideal range.
4
Select your frame size — small, medium, or large — for a personalised estimate.
5
Your ideal weight range based on multiple formulas is displayed instantly.

Why This Matters

  • Set a realistic, science-backed weight loss or gain target
  • Understand what a healthy weight looks like for your specific height
  • Track your progress towards a healthier body weight
  • Differentiate between needing to lose fat vs gaining muscle
  • Use as a starting point for conversations with your doctor or nutritionist

Frequently Asked Questions

Q: Are ideal weight formulas accurate for everyone?
A: These formulas were developed for Western populations and may not perfectly apply to all body types. They are best used as general guidelines alongside BMI and body fat percentage.
Q: What is the Hamwi formula?
A: The Hamwi formula calculates ideal weight as 48kg for 5ft height in males (45.4kg for females), adding 2.7kg (2.3kg for females) for each inch above 5ft. Adapted here for metric.
Q: Should I aim for the exact ideal weight?
A: Not necessarily. A range of ±5kg around the ideal weight is considered healthy. Focus on overall fitness, strength, and health markers rather than hitting an exact number on the scale.
Q: Is muscle weight accounted for?
A: No. These formulas don't distinguish between muscle and fat. A very muscular person may weigh more than the 'ideal' and still be extremely healthy. Body composition matters more than weight alone.
💡 Pro Tip: Weight alone is a poor indicator of health. Two people can weigh the same but have very different body compositions — one mostly muscle, one mostly fat. Focus on reducing body fat percentage rather than just the number on the scale.