Healthy Weight Calculator
Find your healthy weight range based on height, age, gender, and frame size. Enter values for instant results with step-by-step formulas.
Reviewed by Rahul Singh, Health & Wellness Specialist
Formula
Average of Devine, Robinson, Miller, and Hamwi formulas adjusted for frame size
Devine (male): 110 + 5.06 x (height in inches - 60). Robinson (male): 115.2 + 4.19 x (height - 60). Miller (male): 123.8 + 3.08 x (height - 60). Hamwi (male): 106 + 6 x (height - 60). Female formulas use different base weights and increments. Frame size adjusts the result by plus or minus 10 percent.
Worked Examples
Example 1: Average Male - Medium Frame
Problem:A 30-year-old male, 5 feet 9 inches tall, with a medium body frame wants to know his healthy weight range.
Solution:Height: 69 inches (175.3 cm)\nDevine: 110 + 5.06 x (69-60) = 155.5 lbs\nRobinson: 115.2 + 4.19 x (69-60) = 152.9 lbs\nMiller: 123.8 + 3.08 x (69-60) = 151.5 lbs\nHamwi: 106 + 6 x (69-60) = 160 lbs\nAverage: (155.5 + 152.9 + 151.5 + 160) / 4 = 155.0 lbs\nFrame adjustment (medium): x 1.0 = 155.0 lbs\nHealthy range: 139.5 - 170.5 lbs\nBMI range: 128.9 - 173.7 lbs
Result:Ideal Weight: 155 lbs | Healthy Range: 139 - 171 lbs | BMI at ideal: 22.9
Example 2: Female - Small Frame
Problem:A 45-year-old female, 5 feet 4 inches tall, with a small body frame.
Solution:Height: 64 inches (162.6 cm)\nDevine: 100 + 5.06 x (64-60) = 120.2 lbs\nRobinson: 108.2 + 3.62 x (64-60) = 122.7 lbs\nMiller: 115.7 + 2.86 x (64-60) = 127.1 lbs\nHamwi: 100 + 5 x (64-60) = 120 lbs\nAverage: (120.2 + 122.7 + 127.1 + 120) / 4 = 122.5 lbs\nFrame adjustment (small): x 0.9 = 110.3 lbs\nHealthy range: 107.8 - 121.3 lbs
Result:Ideal Weight: 110 lbs | Healthy Range: 108 - 121 lbs | BMI at ideal: 18.9
Frequently Asked Questions
What is a healthy weight and how is it determined?
A healthy weight is a range rather than a single number, determined by multiple factors including height, gender, age, body frame size, and body composition. Medical professionals use several established formulas and the BMI scale to estimate ideal weight ranges, but these are guidelines rather than absolute rules. The most commonly referenced standard is a BMI between 18.5 and 24.9, which correlates with lower risks of heart disease, diabetes, hypertension, and certain cancers in population studies. However, individual health depends on much more than weight alone, including muscle mass, waist circumference, fitness level, blood pressure, cholesterol, and blood sugar levels. Healthy Weight Calculator combines four peer-reviewed formulas to provide a comprehensive range.
How does body frame size affect ideal weight?
Body frame size accounts for skeletal structure differences that meaningfully impact what constitutes a healthy weight for individuals of the same height. People with larger bone structures naturally weigh more even at the same body fat percentage because bones, joints, and the supporting musculature are heavier. A small-framed person might be perfectly healthy at 130 pounds while a large-framed person of the same height would be underweight at that same weight. To determine your frame size, wrap your thumb and middle finger around your wrist. If they overlap you have a small frame, if they just touch you have a medium frame, and if they do not meet you have a large frame. Healthy Weight Calculator adjusts the ideal weight by 10 percent up or down based on frame size.
How does age affect what constitutes a healthy weight?
Age significantly influences healthy weight ranges because body composition changes throughout life even when total weight remains stable. Starting around age 30, adults typically lose approximately 3 to 5 percent of muscle mass per decade through a process called sarcopenia, while simultaneously gaining fat tissue. This means that maintaining the same weight as you age may actually represent an increase in body fat percentage. Research suggests that older adults with slightly higher BMIs in the 25 to 27 range may actually have better health outcomes than those with BMIs in the traditional normal range, a phenomenon known as the obesity paradox. This is partly because extra weight provides reserves during illness and protects against frailty-related falls and fractures.
What is the difference between ideal weight and healthy weight range?
Ideal weight refers to a single target number estimated by mathematical formulas based on your height and gender, while healthy weight range encompasses a broader span of weights within which your health risks remain low. The ideal weight from formulas like Devine or Robinson represents a statistical average and does not account for individual variation in muscle mass, bone density, or body composition. The healthy weight range is more practical because it acknowledges that equally healthy people of the same height can differ by 20 to 30 pounds depending on their build and fitness level. Healthy Weight Calculator shows both the formula-based ideal weight and the broader healthy range to give you a realistic target zone rather than an overly specific number.
References
Reviewed by Rahul Singh, Health & Wellness Specialist · Editorial policy