Ideal Weight Calculator

Enter your height to see a healthy-weight range and, for reference, the classic "ideal body weight" figures used in clinical settings. Think of these as a rough guide, not a number you have to hit.

SexHeight (cm)

Healthy-weight range (BMI 18.5–24.9)

50–68 kg

≈ 111–149 lb

Devine IBW

57 kg (125 lb)

Robinson IBW

57 kg (127 lb)

These are rough population estimates. A healthy weight for you depends on your build, muscle, and overall health — the range is a guide, not a goal to chase.

How it works

The main figure is a healthy-weight range, worked out from a BMI of 18.5 to 24.9 for your height (weight = BMI × height in metres squared). Below it are two well-known "ideal body weight" (IBW) formulas — Devine and Robinson — which were originally created to help calculate medication doses, not to set a personal weight goal. They use your height and sex to estimate a single reference weight.

Please read these numbers gently. BMI and IBW are blunt, population-level tools. They can't see your muscle, bone density, body composition, or health markers, and two people at the same weight can be in very different health. Athletes and people with more muscle often read as "overweight" on BMI while being perfectly healthy. There is no single "ideal" weight that's right for everyone of a given height.

Your health is about far more than a number on a scale — how you eat, move, sleep, and feel matters more. If you're thinking about your weight, a doctor or dietitian can look at the whole picture with you, without the diet-culture pressure.