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How-to guide

How to Calculate Ideal Weight: Formula, Steps & Examples

Learn how to calculate Ideal Weight — the formula explained step by step, with worked examples and a free calculator to check your answer.

By Dr. Neha Sharma, MBBS, MD (Nutrition) · Updated Jun 2026 · 2 min read

Calculating your ideal weight (devine) is straightforward once you know the Ideal Weight formula and what each input means. This guide explains the method in plain language, walks through a manual calculation, and gives worked examples you can follow — then you can do it instantly with the Ideal Weight Calculator.

What is Ideal Weight?

The Ideal Weight calculation tells you your ideal weight (devine) from a few simple inputs. The figure you are solving for here is the ideal weight (devine), expressed in kg.

The Ideal Weight formula

This calculation combines several inputs through a multi-step method rather than a single one-line formula. Enter the values below and the calculator resolves each step in order. The inputs it needs are:

  • Gender — a number. Example: 1.
  • Height — a value measured in cm. Example: 175 cm.

How to calculate it step by step

  • Write down the gender (for example, 1).
  • Write down the height (for example, 175 cm).
  • Apply the formula above to get your ideal weight (devine).
  • Double-check the result with the Ideal Weight Calculator.

Worked examples

Example 1

Input / OutputValue
Gender1
Height175 cm
Ideal weight (Devine)70.6 kg
Healthy range (min)56.7 kg
Healthy range (max)76.3 kg

With gender of 1 and height of 175 cm, the ideal weight (devine) works out to 70.6 kg.

Example 2

With gender of 1 and height of 260 cm, the ideal weight (devine) works out to 147.9 kg.

ResultValue
Ideal weight (Devine)147.9 kg
Healthy range (min)125.1 kg
Healthy range (max)168.3 kg

Example 3

With gender of 1 and height of 120 cm, the ideal weight (devine) works out to 20.5 kg.

ResultValue
Ideal weight (Devine)20.5 kg
Healthy range (min)26.6 kg
Healthy range (max)35.9 kg

Tips for an accurate result

  • Keep your units consistent — mixing, say, months with years or grams with kilograms is the most common source of error.
  • Round only at the very end. Rounding inputs early can shift the final answer noticeably.
  • Re-run the numbers whenever an input changes, rather than estimating from an old result.
  • These figures are general estimates, not medical advice — check with a qualified professional before acting on them.

Prefer not to do the maths by hand? — the Ideal Weight Calculator does it instantly, for free, with the formula and a worked example built in.

Continue exploring health calculators with these tools: BMI Calculator, Corrected Calcium Calculator, Anion Gap Calculator, QTc Calculator (Bazett), Maintenance Fluid Calculator (4-2-1 Rule).

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Frequently asked questions

Gather each input, apply the formula step by step keeping your units consistent, and round only at the end. You can verify your answer instantly with the Ideal Weight Calculator.

It uses the standard formula with exact arithmetic, so the result is correct for the inputs you enter. Bear in mind that real-world outcomes can still differ when underlying assumptions change.

The ideal weight (devine) is expressed in kg. Make sure your inputs use matching units so the result is correct.

Dr. Neha Sharma · MBBS, MD (Nutrition)

Dr. Neha Sharma is a physician specialising in nutrition and preventive health, with over a decade of clinical experience helping patients understand body metrics and healthy lifestyle targets.