Enter your details below to find your medically recommended weight range.
Male
Female
Biological sex affects formula calculations.
Please enter a valid height in feet.
Enter inches (0-11).
Please enter valid inches (0-11).
Used for BMI comparison.
Please enter a valid weight.
Please enter a valid age.
Estimated Right Weight (Devine Formula)
166.3 lbs
Formula used: Devine (1974) – Standard Medical Baseline
Healthy BMI Range
128 – 173 lbs
Current BMI
23.6
BMI Category
Normal
Formula Comparison
Different medical researchers have proposed slightly different formulas for "my right weight".
Formula
Calculated Weight (lbs)
Methodology Focus
Weight Analysis Chart
Comparison of your current weight vs. various ideal weight formulas.
My Right Weight Calculator: Comprehensive Guide to Ideal Body Weight
Finding "my right weight calculator" is one of the most common first steps for individuals looking to improve their health, fitness, or manage a medical condition. Unlike a simple scale reading, determining your ideal body weight (IBW) involves understanding the biological relationship between your height, gender, and frame size. This guide and tool provide medically standard estimations to help you set realistic health goals.
What is My Right Weight Calculator?
The "my right weight calculator" is a digital tool designed to estimate the Ideal Body Weight (IBW) for an individual based on anthropometric data. It uses established pharmacological equations—such as the Devine, Robinson, and Miller formulas—to provide a target weight range associated with statistical longevity and lower risk of chronic disease.
This tool is essential for:
Medical Baselines: Doctors use IBW to dose medications effectively.
Fitness Goals: Athletes use it to determine target weight classes or composition goals.
Health Monitoring: Individuals use it to gauge if they are deviating significantly from a healthy norm.
Common Misconceptions
It is important to note that "right weight" is not a single perfect number. Muscle mass, bone density, and age play significant roles. A bodybuilder may weigh far more than the calculator suggests but still be healthy. Conversely, an elderly person might weigh the "right" amount but lack necessary muscle mass. Use these numbers as a guideline, not a strict rule.
My Right Weight Calculator Formula and Explanation
There is no single universal formula for "my right weight calculator" results. Instead, several formulas have been developed over decades. Our calculator primarily highlights the Devine Formula, as it is the most widely accepted standard in medical practice.
Variable
Meaning
Unit
Typical Range
H
Height in inches over 5 feet
Inches
0 – 36
Base Weight
Starting calculation constant
kg / lbs
50kg (M) / 45.5kg (F)
Rate
Weight added per inch
kg / lbs
2.3kg per inch
The Devine Formula (1974)
Originally developed to calculate drug dosages (like gentamicin), this formula has become the de facto standard for IBW.
Men: 50.0 kg + 2.3 kg per inch over 5 feet
Women: 45.5 kg + 2.3 kg per inch over 5 feet
The Robinson Formula (1983)
A modification of the Devine formula using slightly different empirical data.
Men: 52 kg + 1.9 kg per inch over 5 feet
Women: 49 kg + 1.7 kg per inch over 5 feet
Practical Examples
Example 1: The Average Male
John is a 30-year-old male, 5 feet 10 inches tall. He wants to know his result from the "my right weight calculator".
Input: Male, 5′ 10″ (10 inches over 5 ft).
Calculation (Devine): 50 kg + (2.3 kg * 10) = 73 kg.
Conversion: 73 kg * 2.20462 = 161 lbs.
Interpretation: John's medical ideal weight is approximately 161 lbs. If he weighs 200 lbs, he might aim to reduce his weight closer to this figure, depending on muscle mass.
Example 2: The Petite Female
Sarah is 5 feet 2 inches tall. She consults the tool.
Input: Female, 5′ 2″ (2 inches over 5 ft).
Calculation (Devine): 45.5 kg + (2.3 kg * 2) = 50.1 kg.
Conversion: 50.1 kg * 2.20462 = 110.5 lbs.
Interpretation: A weight around 110-115 lbs is considered ideal for her frame according to the Devine formula.
How to Use This My Right Weight Calculator
Select Gender: Choose biological sex. This changes the base constant in the algorithm.
Enter Height: Input your height accurately in feet and inches. This is the most critical variable.
Enter Current Weight: Providing your current weight allows the calculator to compute your BMI and compare it against the ideal.
Review Results: Look at the "Estimated Right Weight" box for your primary target. Check the "Healthy BMI Range" for a broader, more flexible goal window.
Key Factors That Affect My Right Weight Results
When analyzing the output of any "my right weight calculator", consider these six financial and physical factors:
Muscle Mass vs. Body Fat: Muscle is denser than fat. A high-performing athlete may register as "overweight" on simple charts while having a low body fat percentage and excellent health.
Frame Size: People with larger bone structures (wrist circumference > 7 inches) naturally carry more weight. The Hamwi formula often accounts for frame size adjustments of ±10%.
Age and Metabolism: As we age, muscle mass tends to decrease and metabolism slows. The "right weight" for a 60-year-old might be slightly higher than for a 20-year-old to provide nutritional reserves.
Fluid Retention: Daily weight fluctuates by 1-4 lbs due to sodium intake and hydration. Never take a single reading as absolute truth; look for trends over time.
Health Conditions: Conditions like thyroid issues or diabetes can impact what constitutes a healthy maintainable weight.
Pregnancy and Lactation: These formulas are NOT valid for pregnant or breastfeeding women, who have distinct nutritional and weight gain requirements.
Frequently Asked Questions (FAQ)
1. Is the "my right weight calculator" 100% accurate?
No calculator is perfect. It provides a statistical average based on population data. Your specific "right weight" depends on your unique body composition and health history.
2. Which formula is the best?
The Devine formula is the most commonly used in hospitals. However, the Miller formula is often preferred for shorter individuals, while Robinson is sometimes used for taller populations.
3. Does this calculate Body Fat Percentage?
No. This tool calculates Ideal Body Weight based on height. To measure body fat, you would need calipers or a DEXA scan.
4. Why is the BMI range so wide?
The BMI "Normal" range (18.5-24.9) is designed to accommodate different body types (ectomorph, mesomorph, endomorph). As long as you are within this range, you are generally considered statistically healthy.
5. What if I am an athlete?
If you are an athlete, disregard the strict IBW number. Focus on performance metrics and body fat percentage instead. You will likely weigh more than the calculator suggests.
6. How often should I check my weight?
Checking once a week is usually sufficient to track trends without becoming obsessed with daily fluctuations.
7. Can I use this for children?
No. Children and teenagers require specialized growth charts (CDC growth percentiles) because their bodies are still developing.
8. What constitutes a dangerous weight?
Generally, a BMI below 18.5 (Underweight) or above 30 (Obese) is associated with higher health risks. Consult a doctor if your numbers fall in these ranges.
Related Tools and Internal Resources
Explore more of our health and fitness calculators to get a complete picture of your wellness:
BMI Calculator – Calculate your Body Mass Index specifically.