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Ideal Weight Calculator

Estimate your ideal healthy body weight using popular medical formulas.

How Much Should I Weigh?

Almost everyone has wondered at some point what their “ideal” body weight should be. This curiosity is often shaped by what we see in movies, social media, magazines, and fitness trends.

Ideal Body Weight (IBW) was originally developed for medical and dosage calculations, not for appearance or aesthetics.

What Is Ideal Body Weight (IBW)?

IBW is an estimated weight range based on height and gender. It is commonly used in medicine, sports classifications, and health screenings.

Is IBW a Perfect Measure?

No single formula can define how much someone “should” weigh. IBW does not account for muscle mass, body fat percentage, or overall body composition.

Key Factors That Influence Ideal Weight

Understanding Body Frame Size

Body frame size is typically estimated using wrist circumference relative to height. A large-framed person will naturally weigh more than a small-framed person at the same height.

Popular Ideal Weight Formulas

Devine Formula (Most Common)

Men: 50.0 kg + 2.3 kg per inch over 5 feet
Women: 45.5 kg + 2.3 kg per inch over 5 feet
Hamwi Formula

Men: 48.0 kg + 2.7 kg per inch over 5 feet
Women: 45.5 kg + 2.2 kg per inch over 5 feet
Robinson Formula

Men: 52 kg + 1.9 kg per inch over 5 feet
Women: 49 kg + 1.7 kg per inch over 5 feet
Miller Formula

Men: 56.2 kg + 1.41 kg per inch over 5 feet
Women: 53.1 kg + 1.36 kg per inch over 5 feet

Healthy BMI Weight Range

According to the World Health Organization (WHO), a healthy BMI range for adults is 18.5 to 25. This range can be used to estimate a healthy weight for any height.

While BMI is widely used in healthcare, it should be viewed as a screening tool, not a diagnosis of health.

Ideal Weight for Children & Teens

IBW formulas apply only to adults. For children and teens ages 2–20, the CDC recommends BMI percentiles between the 5th and 85th percentile based on age and gender.

Limitations of Ideal Weight Calculators

Ideal weight formulas are designed for broad populations. They do not consider muscle-to-fat ratio, physical disabilities, athletic training, or individual metabolism.

Use IBW as a general reference, not a strict goal. Long-term health depends far more on lifestyle than hitting a specific number on the scale.

Frequently Asked Questions

Is ideal weight the same for everyone?

No. Ideal weight varies widely based on body composition, genetics, lifestyle, and overall health.

Can I be healthy outside my IBW range?

Absolutely. Many athletes and fit individuals fall outside IBW ranges and are still very healthy.

Should I try to reach my IBW?

IBW is a guideline, not a requirement. Focus on healthy habits rather than a specific weight.

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