Ideal Weight Calculator

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Compare four classic ideal-body-weight formulas (Devine, Robinson, Miller, Hamwi) for your height.

Inputs

Sex

Height (cm)

How to use this calculator: Ideal Weight Calculator

Compare four classic ideal-body-weight formulas (Devine, Robinson, Miller, Hamwi) for your height. The example below is calculated by this page's real engine from the displayed inputs.

1Confirm that the Ideal Weight Calculator matches the quantity or design check you need.
2Enter Height using the units printed beside each field.
3Select the applicable Sex options; these choices change the calculation method or factors.
4Calculate, then follow the substituted equations in the worked example and compare the result with any stated limit.
5Read the assumptions, warnings and cited references before using the result for a financial, medical or engineering decision.

Input guide and example values

Use values from the same measurement basis and time period. Conditional fields appear only when the related option is selected.

Input	Example value	Why it matters
Sex	Male	Select the option that matches the real installation or scenario.
Height	172 cm	Measured or known height used by the calculation engine.

Formula inputs & variables for Ideal Weight Calculator

These are the named quantities used by this calculator. When the source formula does not define a mathematical symbol, OneCalcApp keeps the real input label instead of inventing one.

Variable / input	Unit	Meaning in this calculation
Sex	—	Select the option that matches the real installation or scenario.
Height	cm	Measured or known height used by the calculation engine.

How the Ideal Weight Calculator works

The Ideal Weight Calculator uses Sex and Height to calculate Average ideal weight, Devine, Robinson, Miller, and Hamwi. Its engine applies Devine: 50 / 45.5 kg + 2.3 kg per inch over 5 ft; the worked values below come from that same live calculation rather than a separately typed example.

With Sex Male and Height 172 cm, the main worked-example result is Average ideal weight = 67.6 kg.

How each Ideal Weight Calculator input is used

Sex

The Ideal Weight Calculator worked example selects “Male”. Available choices include Male and Female. This selection may change the method or factor used by the engine, so choose the option that matches the real case.

Height

The Ideal Weight Calculator worked example uses Height = 172 cm. This value is passed directly into the calculation, with an allowed minimum 0.

Ideal Weight Calculator formulas and result interpretation

Formula 1: relationship used

In the Ideal Weight Calculator, Devine: 50 / 45.5 kg + 2.3 kg per inch over 5 ft. The quantities in this relationship come from the named inputs or from an earlier calculation step shown in the worked example.

Formula 2: relationship used

In the Ideal Weight Calculator, Robinson, Miller and Hamwi use the same shape with different constants. The quantities in this relationship come from the named inputs or from an earlier calculation step shown in the worked example.

Average ideal weight

For the displayed Ideal Weight Calculator worked example, Average ideal weight is 67.6 kg. Verify Sex and Height and their units before relying on this output.

Devine

For the displayed Ideal Weight Calculator worked example, Devine is 67.7 kg. Verify Sex and Height and their units before relying on this output.

Robinson

For the displayed Ideal Weight Calculator worked example, Robinson is 66.7 kg. Verify Sex and Height and their units before relying on this output.

Miller

For the displayed Ideal Weight Calculator worked example, Miller is 67.1 kg. Verify Sex and Height and their units before relying on this output.

Hamwi

For the displayed Ideal Weight Calculator worked example, Hamwi is 68.8 kg. Verify Sex and Height and their units before relying on this output.

Ideal Weight Calculator accuracy, checks and limitations

Ideal Weight Calculator units check: confirm Sex and Height (cm) before calculating.
Ideal Weight Calculator result check: compare Average ideal weight, Devine, Robinson, Miller, and Hamwi with the substituted formula steps and the displayed rounding precision.
Ideal Weight Calculator: This is a general estimate, not a diagnosis or personal medical advice. Discuss health decisions with a qualified clinician.

Formula, derivation and worked example

There is no single ideal weight — these four medical formulas, still used for drug dosing, give a range. Treat the spread as a healthy target zone rather than an exact number, because they ignore muscle mass and frame size.

Devine: 50 / 45.5 kg + 2.3 kg per inch over 5 ft

Robinson, Miller and Hamwi use the same shape with different constants

Substitution steps

1. Inches over 5 ft
height/2.54 − 60
= 7.7

Computed example results

Average ideal weight: 67.6 kg
Devine: 67.7 kg
Robinson: 66.7 kg
Miller: 67.1 kg
Hamwi: 68.8 kg

Understanding the result

Read the main result together with supporting checks, assumptions, limits and intermediate values.

For a manual check, repeat the first equation, confirm the units and change one input at a time.

Assumptions and calculation scope

Height is assumed to be entered in cm; converting from another unit before entry avoids changing the numerical meaning of the calculation.
Sex is assumed to match the real case. Choosing a different available option can change the method, factor or interpretation used by this calculator.
Ideal Weight Calculator applies the displayed Devine: 50 / 45.5 kg + 2.3 kg per inch over 5 ft relationship to the entered health inputs. Factors that are not exposed as inputs or stated assumptions are outside this calculator's calculation scope.

Common mistakes when using Ideal Weight Calculator

Do not mix units for Height (cm). A unit mismatch changes the input magnitude even when the typed number looks reasonable.
Do not leave Sex on the default choice unless that choice matches the real scenario; the selected option can change the calculation path or factor.
Do not replace the displayed Devine: 50 / 45.5 kg + 2.3 kg per inch over 5 ft relationship with a different convention without also changing the underlying assumptions; compare like-for-like methods when checking the result.
Do not treat Average ideal weight = 67.6 kg from the worked example as a universal answer. It belongs to the displayed example inputs and must be recalculated for the actual case.

When the Ideal Weight Calculator is useful

Ideal Weight Calculator is designed for cases where Sex, Height are known and you need Average ideal weight, Devine, Robinson. The page keeps the live calculator, calculation method and worked example together so the result can be checked instead of treated as a black-box number.

Use the calculator for the scope described by its inputs and notes. The displayed method is Devine: 50 / 45.5 kg + 2.3 kg per inch over 5 ft. If the real project or decision needs factors that are not represented here, treat the result as an estimate and add the missing checks separately.

Sex and Height: what changes the answer

The worked example uses Sex = Male, Height = 172 cm. With those values, Average ideal weight is 67.6 kg. Changing an input should be interpreted according to that field's unit, range, option and hint rather than by the number alone.

For this calculator, the main input roles are: Sex: Select the option that matches the real installation or scenario. Available choices include Male, Female. Height (cm): Measured or known height used by the calculation engine.

How to sanity-check a Ideal Weight Calculator result

Start by confirming the entered values and units, then compare the substituted working with the displayed formula or calculation steps. Pay particular attention to Average ideal weight, because it is the first worked-example output shown by the live engine.

Finally, compare the result with the assumptions, warnings and related calculators on this page. A nearby calculator can be useful as a cross-check when it measures the same workflow from a different input or output direction.

Next logical calculator

Continue with BMI Calculator

Useful next check because both tools use Height, while BMI Calculator answers a different part of the same workflow.

Open BMI Calculator

Formula

Devine: 50 / 45.5 kg + 2.3 kg per inch over 5 ft
Robinson, Miller and Hamwi use the same shape with different constants

Frequently asked questions

What inputs does the Ideal Weight Calculator use?

It uses Sex and Height. Follow the unit printed for each field and choose any selectable option to match the real scenario.

What does the Ideal Weight Calculator calculate?

It calculates Average ideal weight, Devine, Robinson, Miller, and Hamwi. With the displayed default inputs, Average ideal weight is 67.6 kg.

Which formula does the Ideal Weight Calculator use?

The primary relationship is Devine: 50 / 45.5 kg + 2.3 kg per inch over 5 ft. The page also shows substituted values and calculation steps so the result can be checked independently.

How can I verify a Ideal Weight Calculator result?

First verify the units for Sex and Height. Then compare the substituted formula steps with Average ideal weight and its displayed precision.

What are the limitations of the Ideal Weight Calculator?

Ideal Weight Calculator: This is a general estimate, not a diagnosis or personal medical advice. Discuss health decisions with a qualified clinician.

Where can I find related Health tools?

Use the related-tools section on this page to compare another method, change units or continue the same health calculation.

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