A 5’8″ male falls within a healthy weight range at 125 to 164 pounds, based on a BMI of 18.5 to 24.9. The middle of that range, around 140 to 155 pounds, is where most clinical formulas place the “ideal” weight for this height. But the number that’s right for you depends on your build, muscle mass, and where your body carries fat.
The Standard Weight Range for 5’8″
The CDC defines a healthy BMI as 18.5 to just under 25. For someone who stands 5’8″, that translates to a weight window of about 125 to 164 pounds. At 164 pounds you’d sit right at the border of the overweight category, and at 197 pounds you’d cross into the obese range.
Here’s how the full breakdown looks at this height:
- Underweight: below 125 lbs (BMI under 18.5)
- Healthy weight: 125 to 163 lbs (BMI 18.5 to 24.9)
- Overweight: 164 to 196 lbs (BMI 25 to 29.9)
- Class 1 obesity: 197 to 229 lbs (BMI 30 to 34.9)
- Class 2 obesity: 230 to 262 lbs (BMI 35 to 39.9)
- Class 3 obesity: 263 lbs and above (BMI 40+)
These categories apply to all adults 20 and older regardless of age or race, though BMI is a screening tool, not a diagnosis. It doesn’t distinguish between muscle and fat, which matters quite a bit in practice.
What Clinical Formulas Suggest
Doctors and researchers have developed several formulas to estimate an “ideal” body weight for a given height. Three of the most commonly referenced ones give slightly different numbers for a 5’8″ male:
- Devine formula (1974): approximately 154 lbs (70 kg)
- Robinson formula (1983): approximately 149 lbs (67.2 kg)
- Miller formula (1983): approximately 161 lbs (72.5 kg)
These formulas were originally created for clinical purposes like calculating medication doses and ventilator settings, not for telling people what they should weigh. Still, they offer a useful reference point. The clustering of all three between 149 and 161 pounds suggests that the low-to-mid 150s is a reasonable ballpark for an average-framed 5’8″ man.
Why BMI Doesn’t Tell the Whole Story
A 5’8″ man who weighs 180 pounds could be carrying a noticeable amount of excess body fat, or he could be a recreational lifter with dense muscle and relatively little fat. BMI treats both identically, placing them in the overweight category at a BMI of about 27.4. That’s the biggest limitation of using weight alone as a health marker.
Body fat percentage fills in some of the gap. A 2025 study using national survey data defined overweight in men as having at least 25% body fat, and obesity as at least 30% body fat. There’s no universally agreed-upon “ideal” body fat range, but these thresholds give a practical reference. Body fat also tends to increase naturally with age, so a healthy percentage for a 30-year-old may look different from a healthy percentage for a 65-year-old.
Waist Size as a Quick Health Check
If you don’t have access to a body fat measurement, your waist circumference is one of the simplest ways to assess whether your weight is in a healthy zone. The NHS recommends keeping your waist size to less than half your height. For a 5’8″ man (68 inches tall), that means a waist under 34 inches.
This ratio matters because fat stored around the midsection, the visceral fat surrounding your organs, is more strongly linked to metabolic problems than fat carried in the limbs. Two men at the same height and weight can have very different health profiles depending on where that weight sits. A tape measure around the waist, taken at the navel, gives you a fast and surprisingly useful snapshot.
Health Risks at Higher Weights
Crossing from the healthy range into overweight or obese territory at this height doesn’t guarantee health problems, but it does shift the odds. Nearly 9 in 10 people with type 2 diabetes have overweight or obesity. Excess weight also raises the likelihood of heart disease, sleep apnea, joint problems, and certain cancers. These risks climb further as BMI moves into the Class 2 and Class 3 obesity ranges (230 pounds and above for a 5’8″ male).
On the other end, weighing under 125 pounds at this height puts you in the underweight category, which carries its own risks: weakened immunity, bone loss, and nutrient deficiencies among them. The healthy range exists as a window, not a single number, for good reason.
Finding Your Personal Target
The “right” weight for a 5’8″ man depends on factors no chart can capture: your frame size, how much muscle you carry, your age, and your overall metabolic health. A practical approach is to use multiple signals together rather than fixating on the scale alone. Check whether your BMI falls roughly within the 18.5 to 25 range, whether your waist stays under 34 inches, and whether markers like blood pressure, blood sugar, and energy levels are where they should be.
If you’re within 125 to 164 pounds with a waist under 34 inches and normal lab work, your weight is likely in a healthy place. If you’re above that range but active, muscular, and metabolically healthy, the number on the scale may be less meaningful than what’s happening inside your body. Weight is one data point. It’s most useful when you read it alongside the others.