Health & Fitness Calculators
Ideal Weight Calculator
Estimate ideal weight range from height and the Devine formula.
US height units are selected by default. Switch to metric if needed.
Calculation assumptions
- *This page uses the Devine formula plus a healthy-BMI comparison range.
- *Ideal-weight formulas are rough benchmarks and do not account for body composition.
- *Use the result as planning context, not as a medical target by itself.
Enter your values and press Calculate.
Results and breakdowns will appear here after a valid calculation.
How is Ideal Weight Calculated?
There are several formulas for ideal weight. This page uses the Devine formula and also shows a comparison range based on BMI 18.5 to 24.9.
Devine formula 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.
Worked example
Example: for a 5 ft 10 in male, the Devine estimate is 50 + 2.3 x 10 = 73.0 kg, or about 160.9 lb. This is a rough benchmark, not one correct target weight.
Safety notes and common mistakes
Ideal-weight formulas are rough estimates, not medical advice, diagnosis, or treatment guidance.
- Do not treat one formula result as the only healthy weight.
- Do not ignore body frame, muscle mass, body composition, age, or health status.
- Do not use the result to diagnose or manage a medical condition.
- People who are pregnant, under 18, older adults, athletes, or anyone with a medical condition should use professional guidance.
Transparency note
Accuracy and limitations
Calzivo tools are built for practical estimates, conversions, and checks. Some tools use standard formulas or simplified assumptions, and results can be affected by input accuracy, rounding, units, local rules, or changing official requirements.
Health and fitness results are estimates, not medical advice. Formulas simplify real bodies and cycles, so important health decisions should be checked with a qualified clinician.
How to Use This Tool
Use these steps to enter the right inputs and interpret the result correctly.
Select your gender.
Choose US or Metric units.
Enter your height in the matching unit system.
The calculator will show your ideal weight based on the Devine formula and a healthy BMI range.
Related Tools
Other helpful tools in the Health & Fitness Calculators category.
BMI Calculator
Check BMI using height and weight in US or metric units.
Calorie Calculator
Estimate how many calories you need daily.
BMR Calculator
Calculate your Basal Metabolic Rate.
Body Fat Calculator
Estimate body fat percentage from body measurements or a rough BMI-based method with general category guidance.
Lean Body Mass
Estimate your lean body mass and body composition.
Related Guides
Background reading and explanations related to Ideal Weight Calculator.
BMI Explained (What It Means and When It Misleads You)
What your BMI score really means.
BMI Limits: What BMI Can and Cannot Tell You
Understand BMI as a screening estimate and where body composition context matters.
Ideal Weight Is an Estimate, Not a Diagnosis
Read ideal-weight formula results as rough context, not medical conclusions.
Frequently Asked Questions
Common questions about Ideal Weight Calculator and how to read the result.
Is this weight perfect for everyone?
No, 'ideal' weight is a statistical average. Factors like muscle mass, bone density, and body composition are not accounted for.
Which formula does this calculator use?
It uses the Devine formula and also shows a BMI-based comparison range.
Is ideal weight the same as a medical goal?
No. It is a rough estimate and should not be treated as medical advice, diagnosis, or treatment guidance.
Why does body composition matter?
Muscle, bone density, body frame, and fat distribution can make the same weight mean different things for different people.
Can athletes use this?
Athletes can use it as rough context, but formula estimates may not fit high muscle mass or unusual body composition well.
Who should use professional guidance?
People who are pregnant, under 18, older adults, athletes, or anyone with a medical condition should use professional guidance.