Ideal Body Weight Calculator: Find Your Healthy Weight

Use our Ideal Body Weight (IBW) calculator to discover a healthy weight range based on your height and gender, helping you set realistic and attainable fitness goals.

Find Your Healthy Weight Range

What is Ideal Body Weight (IBW)?

Ideal Body Weight (IBW) is not a single, perfect number, but rather a healthy weight range for your specific height and gender. It's a valuable reference point for setting realistic weight management goals and is often used in clinical settings to help guide nutritional therapy and medication dosages. Instead of focusing on one number, think of IBW as a guideline for promoting long-term health and well-being.

How is Ideal Weight Calculated?

To provide a balanced and comprehensive estimate, our calculator uses an average of several widely recognized formulas developed by medical professionals:

G.J. Hamwi Formula (1964)
  • Men: 48.0 kg + 2.7 kg for each inch over 5 feet.
  • Women: 45.5 kg + 2.2 kg for each inch over 5 feet.
B.J. Devine Formula (1974)
  • Men: 50.0 kg + 2.3 kg for each inch over 5 feet.
  • Women: 45.5 kg + 2.3 kg for each inch over 5 feet.

Disclaimer: These formulas are based on averages and do not account for individual differences like body composition (muscle vs. fat) or frame size. Use this range as a helpful starting point and consult a healthcare professional for personalized advice.

Maintained by Live Fitness Check. Last updated: August 9, 2026. How we test our calculators .

About This Calculator

Ideal Weight Calculator provides formula-based reference-weight estimates from height. It is designed to give a quick, understandable estimate from height so the result can be used as a starting point for learning, tracking or a more informed discussion.

Sources

CDC — About BMI and healthy-weight screening: https://www.cdc.gov/bmi/about/index.html
NIDDK — Weight Management information: https://www.niddk.nih.gov/health-information/weight-management

Frequently Asked Questions

What does the Ideal Weight Calculator estimate?

Provides formula-based reference-weight estimates from height.

How is this result calculated?

The calculator applies the reference-weight formula or formulas configured in the live tool to the entered height. The calculation uses height.

How should I use the result?

There is no single medically perfect “ideal weight”; body composition, age, sex, health history and personal goals all matter. Use the number as an estimate and consider professional advice when the result may affect health, treatment, pregnancy, nutrition, exercise safety or another important decision.