The healthy weight range for the height is
0 - 0.
severely
underweight
underweight
healthy
overweight
obese
class I
obese
class II
obese class III
Weight Range by BMI Category
Enter your height and click Calculate to view your healthy weight range
Complete Healthy Weight Calculator Guide, Formulas & Definitions
1. What Is Healthy Body Weight?
Healthy weight is the body weight range associated with the lowest risk of weight-related health problems including heart disease, diabetes, hypertension and certain cancers. This calculator uses the World Health Organization (WHO) standard Body Mass Index (BMI) classification system to determine healthy weight range for a given height.
2. Core Calculation Formula
Healthy weight range is derived by rearranging the standard BMI formula to solve for weight at the upper and lower boundaries of the normal BMI range (18.5 – 24.9).
BMI = Weight (kg) ÷ Height (m)²
Healthy Weight = BMI × Height²
Lower healthy weight = 18.5 × height²
Upper healthy weight = 24.9 × height²
3. WHO Standard BMI Classification System
| Category |
BMI Range (kg/m²) |
General Health Risk Level |
| Severely Underweight |
< 16.0 |
Very high health risk, nutritional deficiency concerns |
| Underweight |
16.0 – 18.4 |
Elevated risk of immune system weakness |
| Normal / Healthy Weight |
18.5 – 24.9 |
Lowest risk of weight-related diseases |
| Overweight |
25.0 – 29.9 |
Moderately elevated metabolic disease risk |
| Obese Class I |
30.0 – 34.9 |
High risk of type 2 diabetes and hypertension |
| Obese Class II |
35.0 – 39.9 |
Very high risk of multiple comorbidities |
| Obese Class III (Morbid) |
≥ 40.0 |
Extremely high health risk, significantly reduced life expectancy |
4. Input Field Explanations
- Height (US): Total body height measured in feet and inches, barefoot standing straight.
- Height (Metric): Total body height measured in centimeters, barefoot standing straight.
- Unit Tabs: Switch between US customary and metric measurement systems.
5. Result Output Definitions
- Healthy Weight Range: The weight range corresponding to BMI 18.5 through 24.9 for your height.
- Color Gradient Bar: Visual scale showing all weight categories from severely underweight to morbidly obese, with numerical markers at each category boundary.
- Category Markers: Exact weight values at each BMI classification threshold positioned proportionally along the scale.
- Weight Range Chart: Bar chart visualizing the weight span of each BMI category for your specific height.
6. Button & Control Function Reference
- US Units / Metric Units Tabs: Switch input measurement system, automatically recalculates results in matching units.
- Calculate Button: Validates height input, computes all BMI category weight boundaries, positions markers on the gradient bar, populates result text and renders the category weight chart.
- Clear Button: Resets height inputs to default sample values, hides result panel and clears chart data.
7. Practical Applications
- Set realistic initial weight loss or weight gain targets
- Understand where your current weight falls on the official BMI scale
- Plan fitness and nutrition goals around evidence-based healthy ranges
- Quick reference for healthcare screening and wellness assessments
8. Important Limitations
BMI is a population-level screening tool and does not directly measure body fat or body composition. Athletes with high muscle mass may fall in the overweight category despite low body fat and excellent health. Older adults, pregnant women, children and people with very large or small bone structure should interpret BMI results with additional context. This calculator provides general guidance and is not a substitute for professional medical advice.