Healthy Weight Calculator
Healthy Weight Calculator
The Healthy Weight Calculator helps you determine your healthy weight range based on your height, using the Body Mass Index (BMI) classification system established by the World Health Organization (WHO). The healthy weight range is defined as the weight range corresponding to a BMI between 18.5 and 25, which is associated with the lowest risk of weight-related health problems and the highest life expectancy. A person 150 cm tall has a healthy range of 41.6 to 56.3 kg, while a person 190 cm tall has a range of 66.8 to 90.3 kg, demonstrating the significant impact of height on healthy weight.
Maintaining a healthy weight is one of the most important factors for overall health and longevity. People within the healthy weight range have lower risks of developing cardiovascular disease, type 2 diabetes, certain cancers, and joint problems. Being at a healthy weight supports better energy levels, improved sleep quality, and enhanced mental wellbeing. The healthy weight range varies significantly based on height because taller individuals have naturally larger body frames. For example, a person who is 150 cm tall has a healthy range of 41.6 to 56.3 kg, while a person who is 190 cm tall has a range of 66.8 to 90.3 kg, demonstrating how dramatically height affects healthy weight targets.
The BMI-based healthy weight range provides a useful starting point for weight management goals. However, BMI does not distinguish between muscle and fat mass. Athletes with significant muscle mass may fall above the range while having low body fat. Older adults with low muscle mass may have normal BMI but carry excess body fat, a condition called normal weight obesity. The calculator provides a general guideline based on population data, not a definitive health assessment.
The healthy weight concept is particularly important for public health screening. Healthcare providers use BMI ranges as an initial assessment tool to identify individuals who may benefit from further evaluation. Research has shown that the relationship between BMI and health outcomes varies across populations, with some ethnic groups experiencing higher health risks at lower BMI levels. Pregnant women, growing children, and certain ethnic groups may have different healthy weight ranges not captured by standard BMI thresholds.
For more information, see the BMI Calculator.
For more information, see the Body Fat Calculator.
The Healthy Weight Calculator is straightforward to use. Enter your height and the calculator instantly shows the corresponding healthy weight range based on WHO guidelines. Results appear in both kilograms and pounds for your convenience regardless of which unit system you select.
Follow these simple steps to find your target healthy weight range.
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Select Your Unit System -- Choose between Metric (centimeters) or US Customary (feet and inches). The calculator accepts both systems and displays results in both kilograms and pounds for your convenience.
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Enter Your Height -- Input your height. In metric mode, enter centimeters. In US mode, enter feet and inches separately. For example, a person 5 feet 7 inches tall would enter 5 in the feet field and 7 in the inches field. The calculator handles the conversion automatically.
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Review Your Range -- The calculator displays your healthy weight range in both kilograms and pounds. This represents the weight range that corresponds to a BMI between 18.5 and 25, which is considered the healthiest range for most adults according to WHO guidelines. Use this range as a target for weight management goals.
Calculation Formula
The healthy weight range is derived from the BMI formula: BMI = Weight (kg) / Height (m)². By rearranging this formula and using the healthy BMI range of 18.5 to 25, we calculate the corresponding weight range for any given height. For pounds, the result is converted using the factor 1 kg = 2.20462 lbs.
Example Calculations
For a person 170 cm tall (1.7 meters):
- Minimum healthy weight: 18.5 × 1.7² = 53.5 kg (117.9 lbs)
- Maximum healthy weight: 25 × 1.7² = 72.3 kg (159.4 lbs)
BMI Weight Classification
| BMI Range | Classification | Health Risk |
|---|---|---|
| Below 18.5 | Underweight | Nutritional deficiencies |
| 18.5 - 25 | Normal weight | Lowest risk |
| 25 - 30 | Overweight | Moderate risk |
| 30 - 35 | Obese Class I | High risk |
| Above 40 | Obese Class III | Extremely high risk |
Healthy Weight Range by Height
The following table provides healthy weight ranges for common heights, calculated using the BMI 18.5-25 formula. Use this as a quick reference to understand how your weight compares to the healthy range.
| Height (cm) | Min (kg) | Max (kg) | Min (lbs) | Max (lbs) |
|---|---|---|---|---|
| 150 | 41.6 | 56.3 | 91.7 | 124.1 |
| 160 | 47.4 | 64.0 | 104.5 | 141.1 |
| 170 | 53.5 | 72.3 | 117.9 | 159.4 |
| 180 | 59.9 | 81.0 | 132.1 | 178.6 |
| 190 | 66.8 | 90.3 | 147.3 | 199.1 |
BMI Limitations -- BMI is a population-level screening tool that does not account for individual differences in body composition. Athletes, bodybuilders, and individuals with high muscle mass may be misclassified as overweight or obese despite having very low body fat percentage. Elderly individuals may have normal BMI but low muscle mass and high body fat. Research has shown that the relationship between BMI and health outcomes varies across populations.
Individual Variation -- The range does not account for frame size, bone density, or fat distribution. Waist circumference and body fat percentage provide additional context beyond weight alone.
Age and Gender Differences -- Body composition changes naturally with age, with muscle mass declining after middle age. Women naturally have higher body fat percentages than men at the same BMI, but the range does not differentiate. Pregnant women, growing children, and certain ethnic groups have different healthy weight considerations not captured by standard BMI thresholds. The calculator should be used as an educational tool rather than a definitive diagnostic instrument.
Focus on Body Composition -- Rather than fixating solely on weight, track changes in how clothing fits, energy levels, and overall wellbeing. Strength training improves body composition by increasing muscle mass, which may increase weight while improving health. Tracking non-scale victories like improved endurance, better sleep, and increased strength provides meaningful feedback.
Combine with Other Metrics -- Use the healthy weight range alongside other health indicators such as waist circumference, body fat percentage, and blood pressure. A holistic view of health provides better guidance than weight alone. Waist circumference, in particular, provides insight into abdominal fat which is a strong predictor of health risk independent of total body weight.
Set Realistic Goals -- If outside the healthy range, aim for gradual changes of 1-2 pounds per week. Even modest weight loss of 5-10% of body weight can significantly improve health outcomes. Sustainable lifestyle changes focused on balanced nutrition, regular activity, adequate sleep, and stress management produce lasting results beyond just weight.
- What is a healthy weight range and how is it calculated?
- It is typically derived from BMI (18.5-24.9 is healthy). For example, at 5ft9in the healthy range is roughly 125-168 lbs. The calculator also factors in age and gender.
- How does age affect healthy weight recommendations?
- For older adults (65+), a slightly higher BMI (up to 27) may be healthy since extra weight can provide nutritional reserves and protection against bone loss.
- Does gender matter for determining healthy weight?
- Yes. Men and women have different body compositions. Methods like Devine and Robinson use separate calculations for each gender.
- What other metrics besides BMI are used?
- The calculator may incorporate waist-to-height ratio, body fat percentage estimates, and alternative formulas such as Devine, Robinson, Miller, and Hamwi.
- Is the healthy weight range accurate for athletes?
- Less accurate for muscular individuals since muscle weighs more than fat. Athletes may have elevated BMI despite low body fat. Body fat percentage is more reliable for them.
- World Health Organization. (2000). Obesity: preventing and managing the global epidemic. Technical Report No. 894.
- National Institutes of Health. (1998). Clinical Guidelines on Overweight and Obesity in Adults.
- Romero-Corral, A., et al. (2008). Accuracy of BMI in diagnosing obesity. International Journal of Obesity, 32(6), 959-966.
- Flegal, K.M., et al. (2013). Association of all-cause mortality with overweight and obesity. JAMA, 309(1), 71-82.
Last updated: May 12, 2026