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Ideal Weight Calculator

Calculate ideal weight using Devine, Robinson, and Miller formulas

Average Ideal Weight
65.7 kg
Devine Formula65.9 kg
Robinson Formula65.2 kg
Miller Formula66.0 kg

Ideal Weight Range

65.2 - 66.0 kg

This range represents the ideal weight calculated by three different scientific formulas. The actual ideal weight varies by individual body composition.

Formulas Used

Devine Formula: Developed in 1974, widely used in clinical settings for drug dosage calculations.

Robinson Formula: A 1983 modification that provides a more moderate estimate than Devine.

Miller Formula: Published in 1983, tends to give slightly higher ideal weights.

What is an Ideal Weight Calculator?

An ideal weight calculator suggests a healthy target weight from your sex and height using several classic formulas (Devine, Robinson, and Miller). These equations originated in clinical settings, including drug-dosing, and estimate a standard weight range based mainly on height. Many people also use a BMI of about 22 as a 'standard' weight, and reading the formula results alongside the BMI range gives you a healthy weight band rather than a single number. The calculator is useful for setting a weight-loss goal or checking whether your current weight sits in a typical range, but because it does not account for frame size or muscle mass, it is best treated as a starting point rather than a strict target.

How to Use

1. Select your sex. 2. Enter your height in centimeters (cm). 3. Calculate to see the ideal weight estimates from the Devine, Robinson, and Miller formulas, each in kilograms. The formulas give slightly different values, so think of them as a range rather than one figure, and use that band to consider a goal weight that suits your build and aims.

Formula & Definition

The tool uses classic formulas anchored at a height of 152.4 cm (5 feet), adding weight for each inch above that: Devine (men) = 50 kg + 2.3 kg x (height in inches - 60) Devine (women) = 45.5 kg + 2.3 kg x (height in inches - 60) The Robinson and Miller formulas share the same form with different coefficients. For example, a man who is 170 cm tall gets about 65.9 kg by the Devine formula. A healthy weight range can also be derived from BMI: convert the 18.5-25 band (with 22 as standard) using your height to get a wider target range.

Interpreting Results

The three formulas differ by a few kilograms, which itself shows there is no single 'correct' answer. Real healthy weight depends on frame size, muscle mass, and body fat. A muscular person can be healthy above their 'ideal' weight, while someone within range can still carry excess fat - so-called normal-weight obesity. Because these formulas use only height, they ignore age and body composition. When choosing a goal weight, use the formula values as a central band, and judge alongside several measures such as BMI, body-fat percentage, and waist circumference. Avoid rapid weight loss or setting an unrealistically low target, which can harm your health.

Frequently Asked Questions

Why do the three formulas give different results? ▾

Devine, Robinson, and Miller were derived from different data with different coefficients. There is no single right answer, so treat them as a range spanning a few kilograms.

Which is right, this or the BMI standard weight? ▾

Both are guides. BMI gives a healthy band from your height (BMI 18.5-25, with 22 as standard), while these formulas give single estimates. Combining them as a range is best.

Does it apply to muscular people? ▾

These formulas use height only and ignore body composition, so they can read low for muscular athletes. Judge alongside body-fat percentage.

Can I use it for children? ▾

No. These are adult formulas. Children should be assessed with age- and sex-specific growth charts (percentiles).

The ideal weight shown is a general guide, not a medical diagnosis or individual advice. A suitable target depends on body composition and health. Consult a doctor or dietitian when planning to lose or gain weight.