Ideal Weight Calculator

How It Works

The ideal weight calculator relies on height-based equations, and, as a result, it stays simple to use. You select sex, choose the unit format that feels natural, and enter your height. The calculator then converts your input into the units required by each formula and returns the ideal weight in kilograms.

Every method has its own logic. Peterson works from a BMI target, while Miller and Robinson use statistical observations for men and women. Devine and Hamwi are classic equations created for clinical needs. In addition, Broca is an older European rule that still appears in many ideal weight charts. By placing all of them in one ideal weight by height calculator, the tool shows a realistic range rather than a single fixed value. 

The results are estimates. A healthy weight value should be considered with other factors, such as age, activity levels, body composition, etc. For this reason, it is preferable to consider the tool as a structured starting point rather than a strict final answer. 

Formula

Below are the formulas that the ideal weight range calculator uses. In several cases, the tool applies the inch-based versions to stay consistent with traditional clinical practice. 

Peterson (2016)

Where, BMItarget = 22 and hm is the height in meters. 

Miller (1983)

Men:

Women:

Robinson (1983)

Men:

Women:

Devine (1974)

Men:

Women:

Hamwi (1964)

Men:

Women:

Broca (1871)

Standard version:

Female variant:

Lorentz (1979)

Single version used in the calculator:

Example

Below is a sample calculation for a person with a height of 170 centimetres. 

First, here are the conversions the ideal weight by height calculator uses:

hm = 1.70, hin = 66.929

For a female with a height of 170 cm, the formulas return the following values: 

Peterson → 2.2 × 22 + 3.5 × 22 × (1.7 – 1.5) = 63.7 kg

Miller → 53.1 + 1.36 × (66.929 – 60) = 62.52 kg

Robinson → 49 + 1.7 × (66.929 – 60) = 60.78 kg 

Devine → 45.5 + 2.3 × (66.929 – 60) = 61.44 kg

Hamwi → 45.5 + 2.2 × (66.929 – 60) = 60.74 kg 

Broca → 170  – 105 = 65 kg

Lorentz  → 170 – 100 – ((170 – 150) ÷ 4) = 65 kg 

For a male at the same height, the calculator produces these results:

Peterson → 2.2 × 22 + 3.5 × 22 × (1.7 – 1.5) = 63.7 kg

Miller → 56.2 + 1.41 × (66.929 – 60) = 65.97 kg

Robinson → 52 + 1.9 × (66.929 – 60) = 65.17 kg

Devine → 50 + 2.3 × (66.929 – 60) = 65.94 kg

Hamwi → 48 + 2.7 × (66.929 – 60) = 66.71 kg

Broca → 170  – 100 = 70 kg

Lorentz → 170- 100 – ((170 – 150) ÷ 4) = 65 kg

How to Interpret Your Results

The values reflect different ways of linking height and weight, and in practice, this spread can help you see meaningful patterns. Some formulas place more emphasis on lean body mass, while others provide a conservative reference point based on early clinical practice. These differences create a range of possible weights instead of a single recommended value.

A useful way to read the results is to look at how consistent the formulas are with one another. When several methods return similar values, that part of the range often is a balanced target. When results vary, try to choose a point near the middle.

Personal factors matter as well, because your body can respond to weight in ways formulas don’t measure directly. Muscle distribution, daily routines, training experience, and other details all influence what feels sustainable for you in practice. Because of this, the calculator is just a set of benchmarks rather than a final target. You can combine these estimates with professional feedback to decide on a goal that supports your long-term routine and well-being. 

FAQ

1. How much should a 5’7’’ male weigh?
   For a height of 5’7’’ (or 170 cm), most formulas place the ideal weight for a male between 63.8 kg and 70 kg. The lower values come from formulas like Robinson and Devine, while Broca gives the highest estimate. Try entering your height into the calculator to see the full range, so you can choose a point that better fits your goals. 
2. How much should a 5’4’’ female weigh?
   For 5’4’’ (162.6 cm), the ideal weight for a female typically falls between 54 and 60 kg, depending on the formula. Some methods lean lighter and others slightly heavier, but this range represents the most common results. 
3. Is the ideal weight the same as the healthy weight?
   Not necessarily. Ideal weight formulas focus only on height, and as a result, they don’t account for muscle mass or specific medical needs. A healthy weight depends on your full body composition and routine. The calculator provides a structured estimate. You can then discuss a specific target with a medical professional. 
4. Does age matter for ideal weight?
   These formulas don’t include age. If you need a value tailored to a specific age group, you should use a normal weight calculator designed for population averages.
5. Can I use this tool for weight planning?
   Yes, as long as you treat the ideal weight calculator results as guidelines. The suggested range can help shape your goals, but you should adjust your target after considering personal factors. 

The ideal weight calculator gathers many trusted formulas in one place and shows how each interprets height. Because it supports several unit formats and provides calculations for both sexes, it presents the information in a practical format. Try entering your height and explore the suggested range to find a practical reference point for your health and fitness plans.