Ideal Weight Calculator

Ideal weight is an estimated reference weight related to height, sex, age, morphology and sometimes a healthy BMI range. It should be read as an indicative zone, not as one strict number to reach.

Formula used

Reference range = comparison of Lorentz, Devine, Creff and healthy BMI range

The page compares Lorentz, Devine, Creff, BMI 22 and the healthy BMI range. It recommends a median and a range to avoid the trap of one isolated number.

Worked example and result reading

Situation

Example: a 35-year-old man, 178 cm and 92 kg gives Lorentz about 71.0 kg, Devine about 73.2 kg, Creff about 73.4 kg and a healthy BMI range around 58.6 to 78.9 kg.

Interpretation

The correct reading is: here is an indicative range, here is why it varies, and here are the limits. The result should be compared with BMI, waist, body composition, activity and health context.

Detailed calculation guide

Why show a range?

A range is more honest than one weight because two people of the same height can have different muscle mass, frame size, fat distribution and goals.

How is healthy BMI used?

The formula weight = BMI × height² converts an adult BMI range into an indicative weight range.

Why compare Lorentz, Devine and Creff?

Each formula uses different assumptions. Comparing them helps explain the gap between results.

Why does waist matter?

Abdominal distribution can change risk interpretation even when weight and BMI look similar.

How do you set a realistic goal?

The best goal is sustainable: stabilization, gradual reduction, waist improvement or renewed activity.

When should you be cautious?

Pregnancy, postpartum, chronic disease, eating disorder, older age, adolescence or intense sport require personalized interpretation.

Key takeaways

One ideal weight can be misleading.
The healthy BMI range gives a broader and more careful interval.
Lorentz, Devine and Creff do not measure muscle or fat.
The result does not replace medical or nutrition advice.

Decision checklist

Check height, current weight and units.
Compare several methods instead of one number.
Show a reference range.
Explain BMI and formula limits.
Add a clear health disclaimer.
Link to BMI, calories, body fat and protein calculators.

Result checks before use

Read the result as a marker

A health or wellness calculator gives an order of magnitude based on general formulas. It does not replace diagnosis, medical follow-up or individual assessment, especially during pregnancy, illness, treatment or unusual symptoms. Use the number as preparation for a better-informed discussion, not as a standalone verdict.

Check personal inputs

Age, height, weight, sex, activity, cycle data or heart rate should be entered carefully. A simple input error can strongly change interpretation for energy needs, heart-rate zones or body markers.

Watch the trend

Use the result to follow a trend rather than judge a single day. Sleep, hydration, activity and energy expenditure naturally vary; a consistent average is more useful than a conclusion from one calculation. Recheck the inputs when your routine, weight, training or objective changes.

Get advice when needed

If the result affects an important medical, nutrition or training decision, confirm it with a qualified professional. Personal context, history and goals can completely change the correct interpretation.

Compare ideal weight methods

Methods do not give the same result. A reliable page should explain these differences rather than hide uncertainty.

Method	Inputs	Advantage	Limit
Healthy BMI	Height	Gives a broad range	Does not measure body composition
BMI 22	Height	Simple midpoint	Over-simplified
Lorentz	Height + sex	Easy to understand	Does not include age or morphology
Devine	Height + sex	Known clinical reference	Designed for specific uses
Creff	Height + age + morphology	More personalized	Subjective morphology

Scenarios to compare

Healthy BMI range

For 1.78 m, BMI 18.5 to 24.9 gives about 58.6 to 78.9 kg.

Lorentz

For a 178 cm man, Lorentz gives about 71 kg.

Devine

For a 178 cm man, Devine gives about 73.2 kg.

Creff

With age 35 and normal morphology, Creff gives about 73.4 kg.

Realistic goal

A gap with current weight should be read progressively, not as an immediate obligation.

Common mistakes to avoid

Believing there is one perfect weight.
Automatically aiming for the lowest number.
Ignoring muscle mass or sports activity.
Confusing estimation with diagnosis.
Forgetting waist measurement.
Applying adult thresholds to children.

What to know before using the result

Ideal Weight Calculator is an educational tool. It does not replace medical advice, diagnosis or personalized care, especially for children, pregnancy, athletes or specific clinical situations.

Frequently asked questions

How do you calculate ideal weight?

The most careful method compares Lorentz, Devine, Creff and the healthy BMI range, then shows an indicative range rather than one number.

What is the ideal weight for my height?

A range can be estimated with weight = BMI × height², using an indicative adult healthy BMI range.

What is the best formula?

There is no universal formula. Methods provide different references and should be explained together.

What is the difference between ideal weight and BMI?

Ideal weight is an estimate. BMI is a weight-to-height ratio that does not directly measure fat or muscle mass.

Is the result reliable for athletes?

Not always. A very muscular person may weigh more while being in good physical condition.

Does this replace medical advice?

No. It is an estimation tool and does not replace a health professional.

Related calculators

View all