A healthy weight for a 5’9 male falls between 128 and 168 pounds based on standard BMI charts. That range corresponds to a BMI of 18.5 to 24.9, which is the category associated with lower risk of chronic disease. But your actual ideal weight within that range (or slightly outside it) depends on your build, muscle mass, age, and how you carry your weight.
The Standard Weight Range for 5’9
Using BMI as a starting point, the weight categories for someone 5’9 break down like this:
- Normal weight: 128 to 168 pounds
- Overweight: 169 to 202 pounds
- Obese: 203 to 263 pounds
That’s a 40-pound spread just within the “normal” category, which tells you there’s no single number you should aim for. A lean, smaller-framed man at 5’9 might be perfectly healthy at 140 pounds, while someone with a stocky, muscular build could be healthy closer to 170 or even above.
What the Ideal Weight Formulas Say
Doctors and researchers have created several formulas to estimate ideal body weight. Each one gives a slightly different answer for a 5’9 male because they were developed from different populations and time periods:
- Hamwi formula: 160 pounds
- Devine formula: 171 pounds
- Robinson formula: 148 pounds
- Miller formula: 152 pounds
The range across these formulas spans from 148 to 171 pounds. Most clinicians treat 160 pounds as a rough midpoint for a 5’9 male with a medium frame. These formulas were originally designed for drug dosing calculations, not as fitness goals, so treat them as ballpark estimates rather than targets.
How Your Frame Size Shifts the Number
Your bone structure meaningfully affects what you should weigh. A quick way to estimate your frame size is to measure around your wrist with a tape measure. For men over 5’5:
- Small frame: wrist circumference between 5.5 and 6.5 inches
- Medium frame: 6.5 to 7.5 inches
- Large frame: over 7.5 inches
If you have a small frame, your ideal weight sits closer to the lower end of the healthy range, around 135 to 150 pounds. A large-framed man can comfortably sit 10 to 15 pounds above the midpoint and still be at a healthy composition. This is one reason two men at the same height can look and feel completely different at the same weight.
Why BMI Doesn’t Tell the Whole Story
The American Medical Association now formally recognizes that BMI is an imperfect measure. It doesn’t distinguish between fat and muscle, doesn’t account for differences across racial and ethnic groups, and loses accuracy when applied to individuals rather than populations. The AMA recommends using BMI alongside other measures like waist circumference, body composition, and metabolic factors.
Here’s one example of where BMI breaks down: a large meta-analysis found that the lowest risk of death from all causes actually fell in the BMI range of 25 to 30, which is technically the “overweight” category. For a 5’9 male, that translates to 169 to 203 pounds. This doesn’t mean being overweight is protective. It likely reflects that people carrying more lean muscle mass end up classified as overweight by BMI even when their body fat is perfectly healthy. It also suggests the standard “normal” cutoff of 168 pounds may be too restrictive for many men.
If you’re someone who lifts weights or plays sports, BMI can be especially misleading. Research on college football players found that their fat-free mass index (a measure of how much muscle you carry relative to your height) regularly exceeded what was previously considered the natural upper limit for men. About 26% of the players in one study surpassed that threshold without steroid use. A muscular 5’9 man at 190 pounds with visible abdominal definition is in a very different health situation than a sedentary man at the same weight.
Two Better Ways to Check Your Health
Waist-to-Height Ratio
A simpler and often more useful number than BMI is your waist-to-height ratio. The guideline is straightforward: keep your waist circumference below half your height. At 5’9 (69 inches), that means your waist should stay under 34.5 inches. This ratio works across different ethnicities and body types and is a strong predictor of heart disease, diabetes, and other metabolic problems. All you need is a tape measure around your waist at navel level.
Body Fat Percentage
Body fat percentage gives you far more useful information than scale weight. A 2025 study defined “overweight” for men as having at least 25% body fat, with “obesity” starting at 30%. There’s no universally agreed-upon ideal range, but most health guidelines consider somewhere between 10% and 20% body fat healthy for adult men, with the number naturally creeping higher after age 60 as muscle mass decreases. You can get a rough estimate from a body composition scale at home, or a more accurate reading from a DEXA scan, which many clinics now offer for under $100.
Finding Your Personal Target
If you’re starting from scratch, 155 to 165 pounds is a reasonable initial target for most 5’9 men with a medium frame and moderate activity level. But the number on the scale matters less than what makes up that weight. Two practical steps give you a clearer picture than any formula: measure your waist (aim for under 34.5 inches) and get a body fat estimate (aim for under 25%, ideally closer to 15 to 20% if you’re under 60).
If you strength train regularly and carry noticeable muscle, you can weigh 175, 185, or even more and be metabolically healthier than someone at 155 who never exercises. Your energy levels, bloodwork, waist measurement, and how your clothes fit are all more honest indicators than a number on a scale calibrated to population averages.