Free Ideal Body Weight Calculator for Adults in kg

Use our free ideal body weight calculator for adults in kg to estimate a reference body weight based on your height and sex.

The calculator gives you a quick result in kilograms without requiring any manual calculation. It may also show your healthy weight range, body mass index, and percentage of ideal body weight when you enter your current weight.

Your ideal body weight is not one medically perfect number. It is a general estimate that can help you understand how your current weight compares with a height-based reference.

Enter your information below to begin.

Important: This calculator provides general educational information. It is not a diagnosis and should not replace advice from a doctor, registered dietitian, or another qualified healthcare professional.

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Calculate Your Ideal Body Weight

Select your sex

• Female

• Male

Enter your height

Choose your preferred unit:

• Centimetres

• Feet and inches

Enter your current weight

Choose your preferred unit:

• Kilograms

• Stones and pounds

Select the calculation button

The calculator will estimate your ideal body weight and display the result in kilograms.

What Is Ideal Body Weight?

Ideal body weight, often shortened to IBW, is an estimated reference weight calculated mainly from a person’s height and sex.

It does not represent one exact weight that every adult of the same height must achieve. Different ideal body weight formulas can give different results for the same person.

An ideal body weight calculation may be useful for:

• General health assessment

• Comparing current weight with a reference weight

• Understanding a possible healthy weight range

• Supporting weight-management discussions

• Estimating percentage of ideal body weight

• Reviewing height-to-weight relationships

• Supporting some clinical calculations

• Setting realistic questions to discuss with a health professional

The result should be treated as a guide rather than a medical goal.

How to Use the Adult Ideal Weight Calculator

The calculator is designed to be quick and easy to use.

1. Select Female or Male

Choose the option that applies to you. Some traditional ideal body weight formulas use different starting values for women and men.

2. Enter Your Height

Enter your height in centimetres or use feet and inches.

Measure your height without shoes and stand straight against a wall for a more accurate result.

3. Enter Your Current Weight

Enter your current weight if you want the calculator to estimate your BMI or percentage of ideal body weight.

You may enter weight in:

• Kilograms

• Stones

• Pounds

• Stones and pounds together

4. Select Calculate

The tool will calculate your estimated ideal body weight and display the result.

5. Review the Full Result

Do not focus only on one number. Review the estimated weight, healthy weight range, BMI, and percentage of ideal body weight together.

How Is Ideal Body Weight Calculated?

Ideal body weight is commonly estimated from height and sex. Several formulas have been developed, and they do not always produce the same answer.

Common methods include:

• Devine formula

• Robinson formula

• Miller formula

• Hamwi formula

• BMI-based weight estimation

These formulas were developed for different purposes and populations. Research comparing ideal body weight equations has found that results can vary depending on which formula is used.

Your calculator should clearly state which formula it uses. Do not describe the result as clinically validated unless the calculation method has been properly reviewed.

Common Ideal Body Weight Formulas

Different calculators may use different formulas. The following methods are commonly discussed in ideal body weight calculation.

Devine Formula

The Devine formula estimates ideal body weight using sex and the number of inches above five feet.

For men:

50 kg + 2.3 kg for each inch over 5 feet

For women:

45.5 kg + 2.3 kg for each inch over 5 feet

This formula was originally developed for medication-related calculations rather than as a universal definition of the healthiest appearance or weight.

Robinson Formula

The Robinson formula also uses sex and height above five feet.

For men:

51.65 kg + 1.85 kg for each inch over 5 feet

For women:

48.67 kg + 1.65 kg for each inch over 5 feet

BMI-Based Ideal Weight Calculation

A BMI-based estimate uses a selected BMI value and the person’s height.

The general calculation is:

Estimated weight in kg = selected BMI × height in metres²

For example, some tools use a BMI near the middle of the healthy adult BMI range to produce a single reference weight.

BMI is calculated by dividing weight in kilograms by height in metres squared.

Why Do Ideal Weight Calculators Give Different Results?

Two ideal body weight calculators may show different results even when you enter the same height and sex.

This happens because calculators may use different:

• Formulas

• Reference values

• Rounding methods

• Unit conversions

• BMI targets

• Height rules

• Healthy weight definitions

One calculator may show a single ideal weight, while another may show a healthy weight range.

A range is often more useful than one exact number because adults of the same height can have different body structures and body compositions.

Ideal Body Weight Calculator for Women

The ideal body weight calculator for women provides an estimated reference weight based mainly on height.

Women of the same height do not always have the same most suitable body weight. Individual differences may include:

• Bone structure

• Muscle mass

• Body fat distribution

• Age

• Genetics

• Pregnancy history

• Menopause

• Health conditions

• Medication

• Physical activity

The result from an ideal body weight calculator for women should therefore be viewed as a general reference.

It should not be used to judge appearance, fitness, fertility, or overall health.

Ideal Body Weight Calculator for Females in kg

An ideal body weight calculator for females may use a sex-specific equation to produce an estimated weight in kilograms.

The calculator may also provide:

• Healthy weight range

• BMI result

• Percentage of ideal body weight

• Difference between current and estimated weight

• Metric and imperial conversions

A result above or below the estimate does not automatically mean that a woman is unhealthy.

People with more muscle may weigh more than a height-based formula suggests. Other people may fall within a calculated range while still having health concerns that require professional assessment.

Ideal Body Weight Chart for Women

People often search for an ideal body weight chart for women to find one correct weight for each height.

However, a healthy adult weight is better understood as a range rather than one fixed number. The same height-based BMI range is generally used for most adult women and men.

The chart below shows an approximate healthy weight range calculated from a BMI of 18.5 to 24.9.

Height	Approximate healthy weight range
150 cm	41.6 kg to 56.0 kg
155 cm	44.4 kg to 59.8 kg
160 cm	47.4 kg to 63.7 kg
165 cm	50.4 kg to 67.8 kg
170 cm	53.5 kg to 72.0 kg
175 cm	56.7 kg to 76.3 kg
180 cm	59.9 kg to 80.7 kg
185 cm	63.3 kg to 85.2 kg
190 cm	66.8 kg to 89.9 kg
195 cm	70.3 kg to 94.7 kg
200 cm	74.0 kg to 99.6 kg

These figures are mathematical estimates, not personalised medical recommendations.

Ideal Body Weight Calculator for Men

An ideal body weight calculator for men estimates a reference weight from height and a male-specific formula.

Men of the same height may have different healthy weights because of differences in:

• Frame size

• Muscle mass

• Body fat percentage

• Age

• Genetics

• Physical activity

• Medical history

A muscular person may weigh more than the estimated ideal weight without having excess body fat.

The result should be considered alongside BMI, waist measurement, body composition, general fitness, and professional health advice.

Ideal Body Weight Chart for Men in kg

The following height and weight chart can be used as a general reference for adult men.

It is based on the healthy adult BMI range rather than one sex-specific ideal body weight formula.

Height	Approximate healthy weight range
150 cm	41.6 kg to 56.0 kg
155 cm	44.4 kg to 59.8 kg
160 cm	47.4 kg to 63.7 kg
165 cm	50.4 kg to 67.8 kg
170 cm	53.5 kg to 72.0 kg
175 cm	56.7 kg to 76.3 kg
180 cm	59.9 kg to 80.7 kg
185 cm	63.3 kg to 85.2 kg
190 cm	66.8 kg to 89.9 kg
195 cm	70.3 kg to 94.7 kg
200 cm	74.0 kg to 99.6 kg

The chart does not account for muscle mass, body fat distribution, medical conditions, or individual health goals.

Ideal Height and Weight Chart With Age

Many people look for an ideal height and weight chart with age. However, most traditional adult ideal body weight formulas do not directly use age.

They usually calculate a reference weight from:

• Height

• Sex

• A selected formula

Age can still affect body composition, muscle mass, bone health, calorie needs, physical ability, and medical risk.

For this reason, an adult’s age may be important during a complete health assessment even when it is not part of the basic ideal body weight formula.

Older adults, pregnant women, athletes, and people with certain medical conditions may need a more individual assessment.

Percentage of Ideal Body Weight Calculator

A percentage of ideal body weight calculator compares your current weight with your estimated ideal body weight.

The calculation is:

Percentage of ideal body weight = current weight ÷ ideal body weight × 100

For example, when a person’s current weight and estimated ideal body weight are the same, the result is 100%.

A result above 100% means the current weight is higher than the selected ideal body weight estimate. A result below 100% means the current weight is lower.

This percentage should not be used alone to diagnose undernutrition, overweight, obesity, or any health condition.

Different ideal body weight formulas can change the percentage result.

Ideal Weight and BMI Calculator

An ideal weight and BMI calculator can provide more information than a tool that shows only one weight estimate.

Ideal body weight estimates a reference weight from height and sex.

BMI compares your current weight with your height.

The BMI calculation is:

BMI = weight in kilograms ÷ height in metres²

For most adults, the commonly used BMI categories are:

BMI	General category
Below 18.5	Underweight
18.5 to 24.9	Healthy weight
25.0 to 29.9	Overweight
30.0 or above	Obesity

BMI is a screening measure and should be considered with other health information. It does not directly measure body fat or diagnose an individual’s health.

Ideal Body Weight and Healthy Weight Range

Ideal body weight and healthy weight range are not exactly the same.

An ideal body weight formula usually gives one estimated number.

A healthy weight range provides a lower and upper reference based on height and a selected BMI range.

For example, two adults may both fall within a healthy weight range while having different:

• Body compositions

• Waist measurements

• Muscle mass

• Fitness levels

• Medical risks

• Nutritional needs

It is usually better to view your ideal weight result as one reference point within a wider health assessment.

Ideal Weight Calculator in kg for Pakistan

This ideal weight calculator in kg for Pakistan displays weight using the metric system, which is widely understood and convenient for health calculations.

People in Pakistan can enter height in centimetres and receive an estimated ideal weight in kilograms.

The basic ideal body weight calculation is not country-specific. However, ethnicity and personal health history can affect how measurements such as BMI are interpreted.

Some health guidance recognises that people from South Asian backgrounds may develop certain weight-related health risks at lower BMI values than some other populations.

People in Pakistan should use the result as a general estimate and discuss individual health risks with a qualified doctor or dietitian.

Ideal Weight Calculator Pakistan

An ideal weight calculator for users in Pakistan may be useful for:

• Converting height into a weight estimate

• Displaying results in kilograms

• Checking a possible healthy weight range

• Calculating BMI

• Comparing current and estimated weight

• Supporting general weight-management planning

The calculator should not be used to prescribe medication, diagnose disease, or create a restrictive eating plan.

Ideal Weight Calculator in Stones and Pounds

The calculator can also support users who prefer stones and pounds.

Useful weight conversions include:

• 1 kilogram is approximately 2.205 pounds

• 1 stone equals 14 pounds

• 1 stone is approximately 6.35 kilograms

When a result is calculated in kilograms, the tool may automatically convert it into stones and pounds.

Suggested imperial result format:

Your estimated ideal body weight is:

[result] kg

This is approximately:

[stone result] stone [pound result] pounds

Minor differences may appear because of rounding.

Ideal Weight Calculator and Lean Body Mass

Ideal body weight and lean body mass are different measurements.

Ideal body weight is a height-based reference estimate.

Lean body mass is the weight of the body excluding body fat. It includes:

• Muscle

• Bone

• Organs

• Body water

• Other non-fat tissue

An ideal weight calculator for lean body mass should not present ideal body weight and lean body mass as the same result.

Lean body mass calculations usually require information such as current weight, height, sex, and sometimes body fat percentage.

A person’s lean body mass can change through muscle gain, muscle loss, ageing, illness, and changes in activity.

Ideal Body Weight and Body Fat Percentage

Body fat percentage estimates how much of a person’s total weight is fat tissue.

It provides different information from ideal body weight and BMI.

Two people with the same height and weight can have different body fat percentages because one may have more muscle and the other may have more body fat.

Body fat percentage can be estimated using:

• Skinfold measurements

• Bioelectrical impedance scales

• Waist and body measurements

• Air-displacement testing

• Medical imaging methods

Home body fat scales may produce different results depending on hydration, food intake, exercise, and device quality.

No single body composition measurement should be treated as a complete health diagnosis.

Ideal Body Weight and Metabolic Rate

Metabolic rate describes how much energy your body uses.

Basal metabolic rate, commonly called BMR, estimates the energy required to support basic functions while at rest.

These functions include:

• Breathing

• Circulation

• Temperature regulation

• Brain activity

• Organ function

• Cell repair

BMR is not the same as ideal body weight.

A metabolic rate calculation may use:

• Age

• Sex

• Height

• Current weight

Your total daily energy requirement also depends on physical activity and other personal factors.

Ideal Body Weight and Calorie Needs

Calorie needs cannot be calculated accurately from ideal body weight alone.

Daily energy needs may depend on:

• Age

• Sex

• Height

• Current weight

• Physical activity

• Body composition

• Pregnancy

• Breastfeeding

• Health conditions

• Weight-management goals

A person trying to reach or maintain a healthy weight may need a personalised calorie and activity plan.

The National Institute of Diabetes and Digestive and Kidney Diseases provides a Body Weight Planner that combines calorie intake and physical activity when estimating changes in body weight over time.

Avoid extreme calorie restriction without professional guidance.

Height-to-Weight Ratio

A height-to-weight relationship compares body weight with height.

BMI is one common way to express this relationship. However, it does not distinguish between muscle, body fat, bone, and other body tissues.

A height-to-weight ratio may be useful for general screening, but it should be considered with:

• Waist measurement

• Body composition

• Blood pressure

• Blood test results

• Medical history

• Fitness

• Nutrition

• Lifestyle

An ideal body weight result is only one part of a wider health assessment.

Ideal Weight and Waist Measurement

Waist measurement can provide additional information about fat stored around the abdomen.

A person can have a BMI within a general healthy range while still carrying a higher amount of abdominal fat.

Likewise, a person with a higher BMI may have a larger amount of muscle rather than excess body fat.

For a fuller assessment, a healthcare professional may consider both BMI and waist size.

Ideal Body Weight for Athletes

Athletes and highly active adults may have more muscle than the average person.

Because muscle contributes to total body weight, an athlete may weigh more than an ideal body weight formula suggests.

This does not automatically mean the athlete has an unhealthy level of body fat.

Athletes may benefit from measurements such as:

• Body fat percentage

• Lean body mass

• Waist measurement

• Performance

• Strength

• Recovery

• Nutrition quality

• Medical assessment

A standard ideal weight calculation may be less useful when muscle mass is significantly above average.

Ideal Body Weight During Pregnancy

A standard ideal body weight calculator is not designed to assess healthy weight gain during pregnancy.

Pregnancy changes:

• Body weight

• Blood volume

• Fluid levels

• Nutritional requirements

• Calorie needs

• Body composition

Pregnant users should follow guidance from a doctor, midwife, or qualified maternity professional.

Do not use a standard adult ideal weight result as a pregnancy weight-loss target.

Healthy Weight Management

Healthy weight management is usually based on sustainable habits rather than reaching one exact number.

Helpful habits may include:

• Eating regular and balanced meals

• Choosing a variety of nutritious foods

• Including suitable sources of protein

• Eating fruit and vegetables

• Choosing fibre-rich foods

• Drinking enough water

• Limiting highly processed foods

• Being physically active

• Getting enough sleep

• Managing stress

• Monitoring progress without becoming obsessive

Healthy eating and regular physical activity can support long-term weight management.

Speak with a qualified professional before making major dietary changes, especially when you have a medical condition or take medication.

Nutrition Guidelines for a Healthy Weight

A balanced eating pattern may include:

• Vegetables

• Fruit

• Whole grains

• Pulses and beans

• Suitable protein sources

• Dairy or appropriate alternatives

• Healthy sources of fat

• Water and other suitable drinks

Portion needs vary from person to person.

Your ideal body weight result should not be used to create a strict meal plan without considering your current health, calorie needs, food preferences, culture, and activity level.

Avoid labelling individual foods as entirely good or bad. The overall eating pattern is more important than one meal.

Exercise Plan for Weight Management

A suitable exercise plan may combine:

• Walking or other aerobic activity

• Strength training

• Mobility exercises

• Flexibility work

• Balance exercises

• Active daily movement

The best plan depends on your health, fitness, age, ability, and goals.

Begin gradually when you are new to exercise. Stop and seek medical advice if activity causes chest pain, fainting, severe breathing difficulty, or another worrying symptom.

People with health conditions, injuries, pregnancy, or long periods of inactivity should ask a qualified professional for personalised guidance.

Benefits of This Free Ideal Body Weight Calculator

This free ideal body weight calculator provides:

• Instant ideal weight estimation

• Results in kilograms

• Female and male calculation options

• Height entry in centimetres

• Height entry in feet and inches

• Weight entry in kilograms

• Weight entry in stones and pounds

• Healthy weight range estimation

• BMI calculation

• Percentage of ideal body weight

• Easy-to-read results

• Mobile-friendly use

• No manual calculation

The calculator is designed for education and general awareness.

Who Should Not Rely on This Calculator Alone?

A standard ideal body weight calculator may not be suitable as the main form of assessment for:

• Pregnant women

• Children and teenagers

• Competitive athletes

• People with very high muscle mass

• Frail older adults

• People with eating disorders

• People with fluid retention

• People with limb loss

• People with serious medical conditions

• People taking medicines that affect body weight

• Anyone needing a medication dose calculation

Seek professional advice when a result may affect medical treatment, nutrition support, or medication.

When Should You Speak to a Healthcare Professional?

Consider speaking with a doctor or registered dietitian when:

• You are losing weight without trying

• Your weight changes rapidly

• You have persistent tiredness or weakness

• You have difficulty eating

• You regularly binge, purge, or restrict food

• You are worried about an eating disorder

• You have diabetes, heart disease, or kidney disease

• You are pregnant or breastfeeding

• You need help setting a safe weight goal

• Your result causes distress or anxiety

• You need a personalised nutrition or exercise plan

• You want to use ideal body weight for medication dosing

An online calculator cannot review symptoms, examine your health, or understand your full medical history.

Frequently Asked Questions

What is my ideal body weight?

Your ideal body weight is an estimated reference based mainly on your height and sex. It is not one perfect or required number.

Is this ideal body weight calculator free?

Yes. The calculator is free to use and provides an estimated result in kilograms.

Is the ideal body weight result exact?

No. Different formulas may produce different results. Your actual healthy weight can also be affected by body composition, health, age, and lifestyle.

What information do I need to use the calculator?

You normally need to enter your sex and height. Entering your current weight may also allow the calculator to calculate BMI and percentage of ideal body weight.

Does the calculator work for women?

Yes. Select the female option to receive an estimate using the calculator’s female calculation method.

Does the calculator work for men?

Yes. Select the male option to receive an estimate using the calculator’s male calculation method.

Can I calculate ideal body weight in kilograms?

Yes. The calculator displays the main result in kilograms.

Can I enter my weight in stones and pounds?

Yes, when the calculator supports imperial units. The result can then be converted into kilograms or displayed in both formats.

Does age affect ideal body weight?

Most common adult ideal body weight formulas do not directly use age. However, age can affect muscle mass, body composition, calorie needs, health risks, and the interpretation of your result.

Is ideal body weight the same as BMI?

No. Ideal body weight estimates a reference weight. BMI compares your current weight with your height.

What is a healthy adult BMI?

For most adults, a BMI from 18.5 to 24.9 is commonly described as the healthy-weight category. BMI is only a screening measurement and may need different interpretation for some people.

Is ideal body weight the same as lean body mass?

No. Ideal body weight is a height-based estimate. Lean body mass is your body weight excluding fat mass.

Is ideal body weight the same as healthy weight?

Not always. Ideal body weight is usually one estimated number. Healthy weight is a broader concept that may include BMI, waist size, body composition, medical history, and lifestyle.

Can the calculator measure body fat percentage?

An ideal body weight calculator does not directly measure body fat. A separate body fat calculation requires additional measurements or equipment.

Can the calculator tell me how many calories I need?

Not from ideal body weight alone. Calorie needs also depend on age, current weight, height, sex, activity, and personal goals.

Can I use this calculator to create an exercise plan?

The result may help you think about general goals, but it cannot create a personalised or medically suitable exercise plan.

Can I use ideal body weight for medication dosage?

Do not calculate or change medication doses using this page. Some medicines require specialised weight calculations performed by a doctor or pharmacist.

Can I use this calculator during pregnancy?

A general adult ideal body weight calculator is not suitable for assessing pregnancy weight gain. Seek guidance from a doctor or maternity professional.

Can athletes use this calculator?

Athletes can view the estimate, but it may not reflect a suitable weight for someone with high muscle mass.

Why is my ideal weight different on another website?

The other website may use a different formula, target BMI, conversion method, or rounding rule.

Should I try to reach the exact result?

Not necessarily. The result is a reference estimate, not a compulsory target. Speak with a qualified professional before making major changes to your weight, diet, or exercise routine.

Calculate Your Ideal Body Weight Now

Enter your sex, height, and current weight to estimate your ideal body weight in kilograms.

You can also review your:

• Healthy weight range

• Body mass index

• Percentage of ideal body weight

• Weight in stones and pounds

Use the result as a general guide and not as a diagnosis.

Calculate Ideal Body Weight

Medical Disclaimer

This ideal body weight calculator and all information on this page are provided for general educational purposes only.

The calculator does not provide medical advice and is not intended to diagnose, prevent, or treat any disease, nutritional condition, or weight-related disorder.

Results are mathematical estimates and may not be suitable for every person. The calculator does not account for every difference in age, body composition, pregnancy, disability, ethnicity, medical history, medication, or physical condition.

Do not use this calculator to calculate medication doses or make changes to prescribed treatment.

Always consult a qualified doctor, registered dietitian, pharmacist, or another appropriate healthcare professional when you have questions about your weight, diet, exercise, medication, or health.