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Ideal Weight Calculator

There is no single "ideal" weight - it depends on your height, frame size, muscle mass, and overall health. This calculator uses four well-known medical formulas to give you a range of ideal body weights, helping you set a realistic and healthy goal.

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1

Enter your details

Gender
cm

Your Ideal Weight Range

Example

Example figures, not your own. Worked for a man of 175 cm. Enter your own details and press Calculate.

Average (Recommended)

70.0kg

Average of all four formulas

Devine Formula

70.5kg

Most widely used clinically

Robinson Formula

68.9kg

Miller Formula

68.7kg

Hamwi Formula

72.0kg

Ideal Weight Range

Based on your height, your ideal weight range is approximately 69 - 72 kg. Adjust by +/- 10% for larger or smaller body frames.

How It Works

Each formula estimates ideal weight from height and gender. The Devine formula (1974) is the most widely used: Men = 50 + 2.3 x (height in inches - 60); Women = 45.5 + 2.3 x (height in inches - 60). Robinson (1983), Miller (1983), and Hamwi (1964) use similar approaches with different coefficients, giving you a range rather than a single number.

How to use it

  1. 1Select your gender
  2. 2Enter your height in centimetres
  3. 3Click "Calculate" to see your ideal weight from four formulas
  4. 4Use the average as a guide, adjusted for your frame size and muscle mass

Quick Reference

Height (cm)Men (kg)Women (kg)
15551-5846-54
16054-6249-57
16557-6652-60
17061-6955-63
17564-7358-66
18067-7761-70
18571-8064-73
19074-8467-76
19577-8870-80
20081-9174-83

Ranges show the spread across all four formulas. Individual ideal weight depends on frame size and body composition.

Ideal Weight Formulas

Devine: Men = 50 + 2.3 x (H_in - 60) | Women = 45.5 + 2.3 x (H_in - 60) Robinson: Men = 52 + 1.9 x (H_in - 60) | Women = 49 + 1.7 x (H_in - 60) Miller: Men = 56.2 + 1.41 x (H_in - 60) | Women = 53.1 + 1.36 x (H_in - 60) Hamwi: Men = 48.0 + 2.7 x (H_in - 60) | Women = 45.5 + 2.2 x (H_in - 60)
H_in
= height in inches (cm / 2.54)

All formulas give weight in kilograms. Results are most relevant for heights between 152 cm (5'0") and 198 cm (6'6"). Add or subtract 10% for large or small frames.

Frequently Asked Questions

Which ideal weight formula is most accurate?
No single formula is definitively best. The Devine formula is used most often in clinical settings, but it was originally designed for drug dosage calculations. Using the average of all four formulas gives you a reasonable target range.
Should I aim for my ideal weight?
Ideal weight formulas provide a general guide, not a strict target. Factors like muscle mass, bone density, and body frame are not accounted for. A healthy BMI range (18.5-24.9) and a comfortable body fat percentage are often better targets.
Why are the ideal weight formulas different?
Each formula was developed at different times using different study populations. Devine (1974) and Hamwi (1964) tend to give higher estimates, while Miller (1983) gives lower values. Robinson (1983) falls in between.
Does frame size affect ideal weight?
Yes. People with larger frames (wider wrists, broader shoulders) naturally weigh more. Add 10% to the calculated ideal weight for large frames and subtract 10% for small frames as a rough adjustment.

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