Ideal Weight Calculator - Calculate Healthy Weight by Height | HealthCalc
Calculate your ideal weight using multiple recognized medical formulas. Discover your healthy weight range with Robinson, Miller, Devine, and Hamwi formulas.
Ideal Weight Calculator
Calculate your ideal weight using multiple recognized medical formulas
Formulas Used
We use Robinson, Miller, Devine, and Hamwi formulas to calculate your average ideal weight.
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What is Ideal Weight?
Ideal weight is a weight range that is considered healthy for a person according to their height, gender, and, in some formulas, age and body structure. Unlike BMI, which only considers weight and height, these formulas provide more specific estimates.
However, it's important to understand that "ideal weight" is a theoretical concept and there is no single perfect weight for each person. Factors such as body composition, muscle mass, bone density, and genetics significantly influence it.
Important note: This calculator averages multiple recognized medical formulas to give you a more accurate and balanced ideal weight range.
Medical Formulas Used
This calculator uses four internationally recognized medical formulas and calculates the average to give you a more accurate range:
1. Robinson Formula (1983)
Developed by researchers at Metropolitan Life Insurance Company. Considered one of the most accurate for the general population.
Men: 52 kg + 1.9 kg per every 2.54 cm over 152.4 cm
Women: 49 kg + 1.7 kg per every 2.54 cm over 152.4 cm
2. Miller Formula (1983)
Similar to Robinson but with slightly different coefficients. Widely used in clinical practice.
Men: 56.2 kg + 1.41 kg per every 2.54 cm over 152.4 cm
Women: 53.1 kg + 1.36 kg per every 2.54 cm over 152.4 cm
3. Devine Formula (1974)
Originally developed to calculate medication doses, adapted to estimate ideal weight. Very commonly used in clinical pharmacology.
Men: 50 kg + 2.3 kg per every 2.54 cm over 152.4 cm
Women: 45.5 kg + 2.3 kg per every 2.54 cm over 152.4 cm
4. Hamwi Formula (1964)
One of the oldest formulas and still widely referenced. Considers different base values for men and women.
Men: 48 kg + 2.7 kg per every 2.54 cm over 152.4 cm
Women: 45.5 kg + 2.2 kg per every 2.54 cm over 152.4 cm
Factors that Affect Your Ideal Weight
- • Body composition: The ratio of muscle vs. fat is more important than total weight. An athletic person may weigh more but be healthier.
- • Bone structure: People with naturally larger or smaller bone structure will have different weights within the healthy range.
- • Age: With age, muscle mass tends to decrease and fat may increase, which can change ideal weight.
- • Genetics: Genetic factors influence body type, fat distribution, and metabolic rate.
- • Activity level: Athletes and very active people may have higher weights due to greater muscle mass.
- • Medical conditions: Some conditions can affect recommended ideal weight (e.g., fluid retention, metabolic conditions).
What is the Difference between Ideal Weight and BMI?
Body Mass Index (BMI)
- • Considers only weight and height
- • Doesn't differentiate between muscle and fat
- • May incorrectly classify athletes
- • Single formula: weight/height²
- • Broad categories (underweight, normal, overweight, obesity)
Ideal Weight
- • Considers height, gender, and age
- • Provides a specific weight or narrow range
- • Multiple recognized medical formulas
- • More personalized by gender
- • Useful as an initial reference point
Recommendation: Use both metrics complementarily. BMI gives you a general category, while ideal weight gives you a more specific target. However, also consider factors such as body composition and activity level.
Limitations of Ideal Weight Formulas
It's important to understand the limitations of these formulas:
- ⚠ They don't consider body composition (muscle vs. fat)
- ⚠ May not be appropriate for athletes with high muscle mass
- ⚠ Don't consider specific medical conditions
- ⚠ Values can vary significantly between formulas (up to 5-10 kg)
- ⚠ They are estimates based on population averages, not personalized
How to Use Ideal Weight in a Healthy Way
✅ Use it as a guide
Ideal weight is a reference, not an absolute goal. A range of ±5% is generally acceptable.
✅ Consider your body composition
If you're athletic or have a lot of muscle mass, a slightly higher weight may be healthy.
✅ Focus on health, not just weight
Cardiovascular health, strength, flexibility, and overall well-being are more important than reaching a specific number.
✅ Consult with professionals
A nutritionist or doctor can help you establish a healthy target weight based on your individual situation.
Medical Disclaimer
This ideal weight calculator is for informational and educational purposes only. It should not be considered medical advice or replace consultation with a nutritionist, doctor, or health professional. Results are approximations based on statistical formulas and may vary according to individual factors such as body composition, muscle mass, bone structure, medical conditions, and genetics. If you have medical conditions, are pregnant, breastfeeding, or following a special diet, consult with a health professional before making significant changes to your weight.