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Ideal Weight Calculator

Find your ideal body weight range based on height using four established medical formulas. Supports metric and imperial. Includes BMI-based healthy range.

Your Height
Unit System
Gender
Height170 cm
cm
100 cm250 cm
Your Result

Fill in the details and
your result appears here.

Ideal Weight
Robinson (1983)
Miller (1983)
Devine (1974)
Hamwi (1964)
BMI Healthy Range
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Did You Know?
Weight range beats exact weight
Being anywhere in the BMI 18.5–24.9 range is associated with lowest health risk. Obsessing over a single "ideal" number misses the point — a 10kg range is healthy for most heights.

How to use this calculator

1

Choose units and gender

All formulas are gender-specific since men and women have different body compositions.

2

Enter your height

Use your actual height. The formulas are height-based only.

3

Compare all four formulas

Each formula gives a slightly different value. The BMI healthy range gives the broadest scientifically supported band.

The formula explained

Four established medical formulas (all based on inches above 5 feet):

Robinson: Male 52 + 1.9×inch, Female 49 + 1.7×inch
Devine: Male 50 + 2.3×inch, Female 45.5 + 2.3×inch

These were originally developed for drug dosing calculations, not aesthetic ideals. The BMI healthy range (18.5–24.9) gives the widest evidence-based healthy weight band.

Frequently Asked Questions

Which ideal weight formula is most accurate?

No single formula is universally most accurate — they were developed for different populations. The BMI healthy range (18.5–24.9) is the most widely used clinical benchmark.

Why do the four formulas give different results?

Each was developed by different researchers using different population samples in different decades. They differ by 1–5kg for most heights — all within a clinically acceptable range.

Should I aim for the exact ideal weight?

Not necessarily. These are statistical averages. Body composition (muscle vs fat), frame size, and age matter more than hitting a precise number. BMI healthy range is more practical.

Does ideal weight differ by age?

These formulas do not adjust for age. In practice, slight weight gain with age is normal and not necessarily unhealthy, especially if body composition is maintained.

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