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Ideal Weight Calculator

Find your ideal body weight range based on height and gender.

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Ideal Weight Calculator

Find your ideal weight range

cm
Complete Guide

Overview

Ideal weight is an estimate of the weight that is associated with the best health outcomes for your height and sex. Multiple validated formulas exist (Devine, Robinson, Miller, Hamwi), each developed for different clinical contexts. Our calculator averages these for a realistic range.

How to Use

1

Select your gender.

2

Enter your height in cm.

3

Select your body frame size (small, medium, large).

4

Click Calculate to see ideal weight across multiple formulas.

Formula & Calculation

Devine: Male = 50 + 2.3×(height_in–60); Female = 45.5 + 2.3×(height_in–60)
Robinson: Male = 52 + 1.9×(height_in–60); Female = 49 + 1.7×(height_in–60)

Benefits of Using This Calculator

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Goal Setting

Set a realistic, evidence-based weight target.

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Clinical Reference

Used by doctors to assess weight status.

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Height-Based

More personalized than general charts.

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Multiple Formulas

Averaged from 3 validated medical formulas.

Pro Tips

  • Use ideal weight as a guide, not a rigid rule.
  • Body composition matters more than the number on the scale.
  • Muscle-heavy individuals may exceed ideal weight while being healthy.
In-Depth Guide

Ideal Weight Calculator: What Should You Actually Weigh?

No single number defines a healthy weight for everyone. This tool uses three validated medical formulas and averages them to give you a realistic, personalised target — not a one-size-fits-all figure pulled from a generic chart.

What Is Ideal Weight?

Ideal weight is the body weight associated with the best health outcomes for a given height and sex. Originally developed for clinical drug dosing, it now also serves as a general health and fitness reference point.

The Three Formulas

Devine (1974): Male = 50 + 2.3 × (inches over 5ft) | Female = 45.5 + 2.3 × (inches over 5ft)

Robinson (1983): Male = 52 + 1.9 × (inches over 5ft) | Female = 49 + 1.7 × (inches over 5ft)

Miller (1983): Male = 56.2 + 1.41 × (inches over 5ft) | Female = 53.1 + 1.36 × (inches over 5ft)

Worked Example — Male, 175 cm

175 cm = 68.9 inches. Excess over 60 inches = 8.9 inches.

Devine: 50 + 2.3 × 8.9 = 70.5 kg | Robinson: 68.9 kg | Miller: 68.7 kg
Average: 69.4 kg

See all three results instantly with our Ideal Weight Calculator.

Why These Formulas Matter

  • Clinical standard. Used in hospitals for drug dose calculations and weight status assessment.
  • More personalised than BMI alone. Height-adjusted and sex-specific.
  • Concrete goal. Gives an evidence-based weight target for fitness planning.
  • Multiple perspectives. Averaging three formulas reduces single-formula bias.

Limitations

  • Does not account for muscle mass — a bodybuilder may be above ideal weight yet be perfectly healthy.
  • Age and body frame size are not fully captured in the formulas.

Practical Tips

Use as a guide, not a rigid target. Being within 5 kg of the formula result is generally a healthy position.

Combine with body fat tracking. A person at ideal weight with 30% body fat is not necessarily healthier than someone 5 kg above it at 18% body fat.

Final Thoughts

Ideal weight provides a ballpark target backed by medical research. Use it as one of several tools — alongside BMI, body fat, and waist measurements — for a complete health picture.

Check your target with our free Ideal Weight Calculator.