Feet to lbs Calculator
A direct conversion from feet to pounds does not exist because height and weight measure different things. This calculator estimates a reasonable body weight in pounds from height using established ideal body weight formulas and a healthy BMI range. It is useful for educational planning, fitness goal setting, and quick screening.
Enter your height and profile
Choose a formula, then calculate your estimated weight in pounds based on height.
The result panel will show ideal body weight by formula, a healthy weight range from BMI 18.5 to 24.9, and a custom BMI target estimate.
How a feet to lbs calculator really works
Many people search for a feet to lbs calculator expecting a simple conversion, but height in feet and weight in pounds are not directly interchangeable. Feet measure length, while pounds measure mass or body weight. Because of that, no legitimate formula can convert a height like 5 feet 10 inches straight into one exact body weight. Instead, calculators like this one estimate a reasonable body weight range from height using health screening formulas, such as ideal body weight equations or body mass index ranges.
That distinction matters. Two people with the same height can have different healthy body weights depending on age, body composition, muscle mass, frame size, and medical context. A very muscular athlete and a sedentary adult might both be 6 feet tall but differ by many pounds while still appearing healthy in different ways. For this reason, a good feet to lbs calculator should be understood as an estimating tool, not a diagnostic tool.
This calculator uses four of the most widely cited ideal body weight methods: Devine, Hamwi, Robinson, and Miller. It also provides a healthy BMI range and an optional custom BMI target estimate. That gives you a more complete answer than a single number because body weight recommendations are usually best viewed as a range rather than one fixed value.
What formulas are used to estimate pounds from height?
The formulas below are commonly used in clinical, fitness, and educational settings. They start with a baseline at 5 feet of height and then add a set amount of weight for each inch above 5 feet.
1. Devine formula
The Devine formula is one of the best known ideal body weight equations and is often referenced in medical dosing contexts. In kilograms, the classic form is:
- Male: 50 kg + 2.3 kg for each inch over 5 feet
- Female: 45.5 kg + 2.3 kg for each inch over 5 feet
After calculating kilograms, the result is converted to pounds using 1 kg = 2.20462 lbs.
2. Hamwi formula
The Hamwi formula is another common estimate that produces slightly different results:
- Male: 48.0 kg + 2.7 kg for each inch over 5 feet
- Female: 45.5 kg + 2.2 kg for each inch over 5 feet
3. Robinson formula
The Robinson formula tends to produce a somewhat lower estimate than Hamwi for many heights:
- Male: 52.0 kg + 1.9 kg for each inch over 5 feet
- Female: 49.0 kg + 1.7 kg for each inch over 5 feet
4. Miller formula
The Miller formula is another ideal body weight equation used for comparison:
- Male: 56.2 kg + 1.41 kg for each inch over 5 feet
- Female: 53.1 kg + 1.36 kg for each inch over 5 feet
Healthy BMI range and why it is included
Alongside ideal body weight formulas, this page also calculates a healthy BMI weight range. BMI stands for body mass index, which is calculated from height and weight. For most adults, a BMI of 18.5 to 24.9 is commonly considered within the healthy weight category. While BMI has limitations, it remains one of the most widely used population screening tools because it is simple and reasonably correlated with health risk at the group level.
When you enter your height, the calculator converts that height into meters and uses the BMI equation to determine the pounds associated with BMI 18.5 and BMI 24.9. It also lets you enter a custom BMI target, such as 22.0, so you can see what that would mean in pounds at your height.
Why BMI can be helpful
- It offers a quick weight screening method based on height.
- It is widely used in public health research.
- It can help identify when a weight is significantly below or above typical ranges.
Why BMI has limitations
- It does not distinguish fat mass from muscle mass.
- It does not directly measure body composition or fat distribution.
- It may overestimate risk in very muscular people and underestimate risk in some others.
Example healthy weight ranges by height
The table below shows approximate healthy body weight ranges in pounds using BMI 18.5 to 24.9 for adults. Values are rounded to the nearest pound.
| Height | Height in inches | BMI 18.5 weight | BMI 24.9 weight | Approximate healthy range |
|---|---|---|---|---|
| 5 ft 0 in | 60 | 95 lbs | 128 lbs | 95 to 128 lbs |
| 5 ft 4 in | 64 | 108 lbs | 145 lbs | 108 to 145 lbs |
| 5 ft 8 in | 68 | 122 lbs | 164 lbs | 122 to 164 lbs |
| 5 ft 10 in | 70 | 129 lbs | 174 lbs | 129 to 174 lbs |
| 6 ft 0 in | 72 | 136 lbs | 184 lbs | 136 to 184 lbs |
| 6 ft 2 in | 74 | 144 lbs | 194 lbs | 144 to 194 lbs |
Comparison of common ideal body weight formulas
For the same height, ideal body weight formulas can produce different outputs. That is normal because they were developed from different assumptions and use different increments per inch over 5 feet. The next table shows estimated values for a 5 ft 10 in adult.
| Formula | Male estimate at 5 ft 10 in | Female estimate at 5 ft 10 in | Notes |
|---|---|---|---|
| Devine | 166.4 lbs | 156.5 lbs | Widely cited and often used for medication dosing estimates |
| Hamwi | 165.3 lbs | 152.1 lbs | Traditional clinical estimate with larger male increment per inch |
| Robinson | 156.5 lbs | 145.5 lbs | Often yields somewhat lower values than Hamwi |
| Miller | 154.6 lbs | 147.0 lbs | Alternative estimate that may track lower than Devine in some heights |
How to use this calculator accurately
- Enter your height in feet and additional inches.
- Select your sex, because the formulas use different baseline values.
- Choose your preferred method, such as Devine or Hamwi.
- Optionally enter a target BMI if you want a custom goal estimate.
- Click Calculate to view your ideal body weight, healthy BMI range, and chart comparison.
The chart compares the four formula outputs side by side, making it easy to see whether your selected method is near the low, middle, or high end of the common estimates. This is useful because many people do better thinking in terms of a practical range rather than a single exact body weight target.
What is a realistic use for a feet to lbs calculator?
A feet to lbs calculator is best used when you need a starting estimate. Common use cases include:
- Setting an initial fitness or body recomposition goal
- Comparing current body weight to a healthy range
- Creating educational content or wellness plans
- Understanding ideal body weight formulas used in healthcare settings
- Evaluating a reasonable target before consulting a clinician or registered dietitian
Factors that can shift your ideal weight above or below the estimate
Even the best height based calculator cannot account for every personal variable. Several factors can make a healthy body weight different from the estimate shown on the page:
Body composition
Muscle is denser than fat. Someone with higher lean mass may be healthy at a body weight above the estimated ideal formula number.
Age and life stage
Older adults may have different body composition patterns, and younger people may still be developing. Pregnancy and postpartum recovery also change body weight needs.
Bone structure and frame size
People with larger frames may naturally sit near the top of a healthy range, while those with smaller frames may sit near the bottom.
Medical history and medications
Certain diseases, treatments, endocrine conditions, or fluid retention can significantly affect body weight. In these cases, medical guidance is more important than formula based estimates.
Important public health statistics
Weight status is often discussed in the context of population trends. According to the Centers for Disease Control and Prevention, BMI remains a major screening tool in adult public health surveillance. The CDC also reports that average adult heights in the United States differ by sex and age group, which is one reason height based weight estimates should be interpreted with context. Meanwhile, the National Heart, Lung, and Blood Institute provides standard adult BMI category cut points used by clinicians and health educators across the country.
These public health resources are valuable because they explain how screening categories are defined and where common weight guidance originates. For more background, review these authoritative sources:
- CDC adult BMI guidance
- National Heart, Lung, and Blood Institute BMI information
- Harvard T.H. Chan School of Public Health BMI overview
Frequently asked questions
Can you really convert feet to pounds?
No. Height and weight are different types of measurements. What calculators actually do is estimate weight from height using formulas or BMI ranges.
Which formula is best?
There is no perfect formula for every person. Devine is very common, Hamwi is traditional, Robinson often gives lower values, and Miller offers another useful comparison point. Looking at all of them together is often more informative than choosing only one.
Should I use the ideal body weight number or the healthy BMI range?
Use both. The ideal body weight formulas give a quick reference point, while the healthy BMI range provides a broader screening window. If the numbers are relatively close, that can reinforce confidence in the estimate.
Does this apply to athletes?
Athletes may have more lean mass than average, so a formula based estimate may be lower than their healthy performance weight. In that case, body composition and sport specific goals matter more.
What if I am below 5 feet tall?
The calculator still works by extending the inch adjustment below the 5 foot baseline. However, formula based estimates become less reliable at more extreme heights, so use the result cautiously and discuss it with a clinician if it will guide a health decision.
Bottom line
A feet to lbs calculator should be understood as a height based weight estimator, not a direct unit converter. Its value comes from translating height into a practical weight estimate using formulas like Devine, Hamwi, Robinson, and Miller, plus a healthy BMI range. For most adults, this is a helpful first step when setting goals or learning where current weight fits relative to common standards. The most accurate interpretation comes from combining these estimates with waist measurement, body composition, physical performance, medical history, and professional guidance.