Ideal Height & Weight Calculator

Compare three well-known formulas to estimate your ideal body weight for your height.

Your Details

cm

Your Results

Healthy Weight Range (BMI 18.5 - 23)
0 - 0 kg
0 kg
Devine Formula
0 kg
Robinson Formula
0 kg
BMI-Range Midpoint
BMI Calculator BMR Calculator Calorie Calculator

How Ideal Weight is Estimated

There is no single "correct" ideal weight — different formulas developed over decades give slightly different estimates. This calculator shows three commonly used approaches side by side.

Why do the three methods disagree?

Each was derived from a different population sample at a different time, using different assumptions about what "ideal" means. None is objectively correct — they're different estimation methods, which is why comparing all three gives a more honest picture than trusting a single number.

MethodFormulaOrigin
Devine (1974)Men: 50 kg + 2.3 kg/inch over 5ft. Women: 45.5 kg + 2.3 kg/inch over 5ft.Originally created for medication dosing, not health assessment.
Robinson (1983)Men: 52 kg + 1.9 kg/inch over 5ft. Women: 49 kg + 1.7 kg/inch over 5ft.A refinement of Devine's coefficients using newer data.
BMI-based rangeWeight range for BMI 18.5 – 23Reflects a healthy band, not one target number — often seen as more clinically relevant for Indians.

How to estimate your ideal weight, step by step

  1. Select your Gender and enter your Height in centimetres or feet/inches.
  2. Click Calculate to see the Devine, Robinson and BMI-based healthy weight range side by side.
  3. Treat the BMI-based healthy range as your main reference, and the Devine/Robinson figures as additional comparison points.

Why muscle mass changes the picture

None of these formulas account for muscle mass, frame size or body composition — they're based on height alone. A muscular or athletic person can weigh noticeably more than any of these estimates while carrying low body fat and being perfectly healthy, since muscle is denser than fat and adds weight without adding health risk.

Disclaimer: Results are estimates for general awareness only and not medical advice. Please consult a doctor or registered dietitian for personalised guidance.

Frequently Asked Questions

Each formula was derived from a different population sample at a different time, using different assumptions about what "ideal" means. Devine (1974) was created for medication dosing, not health assessment. Robinson (1983) refined Devine's coefficients using newer data. The BMI-based range instead defines a healthy band directly from BMI cutoffs, rather than picking one target number. None is objectively "correct" — they're different estimation methods, which is why this calculator shows all three.

The BMI-based healthy range is generally considered more clinically relevant than a single Devine or Robinson number, since it reflects a range associated with lower health risk rather than one formula's historical estimate. Treat Devine and Robinson as reference points for comparison, and the BMI range as your primary guide.

Both formulas were originally developed using imperial units common in US medical practice at the time, with 5 feet (152.4 cm) as a baseline height and a fixed kg-per-inch increment added for every inch taller. This calculator converts your height automatically, so you can enter it in centimetres or feet/inches either way.

A single "ideal weight" number implies there's one correct target, when in reality a range of weights carries similarly low health risk for a given height. The BMI-based range (18.5 to 23 for Indians, using Asian cutoffs) reflects that reality, giving you a healthy band to aim for rather than a single figure that might be unrealistic or unnecessary for your frame.

Yes. None of these formulas account for muscle mass, frame size or body composition — they're based on height alone. A muscular or athletic person can weigh noticeably more than the Devine, Robinson or BMI-range estimate while carrying low body fat and being perfectly healthy, since muscle is denser than fat and adds weight without adding health risk.

It doesn't account for muscle mass, frame size, age, sex-specific body composition differences, or individual health conditions. These formulas were developed on limited population samples decades ago. Results are estimates for general awareness only and not medical advice — consult a doctor or registered dietitian for personalised guidance.
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