A healthy weight for someone 5’6″ falls between 118 and 148 pounds, based on a BMI of 18.5 to 24.9. That’s a 30-pound range, which means there’s no single “ideal” number. Your frame size, muscle mass, sex, and how your body distributes fat all shift where you’ll feel and function best within that window.
Healthy Weight Range at 5’6″
The CDC defines a healthy BMI as 18.5 to just under 25. For someone at 5’6″, that translates to roughly 115 to 154 pounds. The National Heart, Lung, and Blood Institute narrows the practical range slightly, listing 118 to 148 pounds as the span covering BMI 19 through 24. Below 115 pounds puts you in the underweight category. At 155 to 179 pounds, you’re in the overweight range. At 186 pounds or above, the BMI classification shifts to obese.
These cutoffs apply to adults 20 and older regardless of age, sex, or race. They’re a screening tool, not a diagnosis. Two people at 5’6″ and 145 pounds can have very different health profiles depending on where they carry their weight and how much of it is muscle versus fat.
What the “Ideal Weight” Formulas Say
Doctors have used clinical formulas for decades to estimate a target weight. The most common one, the Hamwi formula, starts with a baseline for the first five feet of height, then adds weight per additional inch. For someone 5’6″, the numbers come out to:
- Men: 106 pounds for the first 5 feet, plus 6 pounds per inch beyond that = 142 pounds
- Women: 100 pounds for the first 5 feet, plus 5 pounds per inch = 130 pounds
These formulas were originally designed for medication dosing, not as fitness goals. They give you a midpoint estimate, but they don’t account for bone density, muscle, or body type. A 5’6″ woman with a naturally broad frame might be perfectly healthy at 145 pounds, well above the Hamwi estimate. Think of these numbers as rough center points within the broader healthy range, not as targets you need to hit exactly.
Why BMI Doesn’t Tell the Whole Story
BMI divides your weight by the square of your height. It’s a useful population-level tool, but it can’t distinguish between fat and muscle. A strength-trained person at 5’6″ and 160 pounds might have less body fat than a sedentary person at 140 pounds.
That said, the idea that BMI is completely unreliable for fit people is overstated. Research on both strength-trained and endurance-trained adults found a moderately positive correlation between BMI and body fat percentage, meaning that even among active people, a higher BMI generally did correspond to more body fat. The correlation wasn’t perfect, but it was consistent for both men and women. So while BMI can misclassify some muscular individuals, it’s not as wildly off-base for most people as gym culture sometimes suggests.
Waist Size as a Better Health Indicator
Where you carry fat matters as much as how much you weigh. Fat stored around your midsection, the visceral fat surrounding your organs, drives metabolic risk more than fat stored in your hips or thighs. A simple guideline from the NHS: keep your waist circumference to less than half your height. At 5’6″ (66 inches), that means a waist measurement under 33 inches.
You can measure this yourself with a flexible tape measure placed around your bare waist, just above your hip bones, at the end of a normal exhale. If your weight falls in the healthy BMI range but your waist exceeds 33 inches, you may still carry excess abdominal fat. If your weight is slightly above the “ideal” range but your waist is well under 33 inches, that’s a reassuring sign.
Health Risks Outside the Healthy Range
The reason these ranges exist is that carrying excess weight, particularly around the waist, raises the risk of several serious conditions. Nearly 9 in 10 people with type 2 diabetes have overweight or obesity. Excess body fat can damage the kidneys and force the heart to pump harder to reach all your cells, both of which drive up blood pressure. High blood pressure is the leading cause of strokes.
These risks cluster together in what’s called metabolic syndrome, a combination of a large waist size, high blood sugar, high blood pressure, elevated triglycerides, and low HDL (the protective type of cholesterol). Having any three of these five markers qualifies as metabolic syndrome, which significantly raises your risk for heart disease, diabetes, and stroke. Staying within or moving toward the healthy weight range is one of the most effective ways to reduce all five markers simultaneously.
Finding Your Personal Target
Rather than fixating on one number, think of your target as a zone. Start with the 118 to 148 pound healthy BMI range for 5’6″. Then adjust based on what you know about your body. If you carry more muscle than average from regular resistance training, the upper end of that range or slightly above it may be appropriate. If you have a smaller frame and limited muscle mass, the lower end is more realistic.
Pay attention to trends rather than daily fluctuations. Your weight can swing 2 to 5 pounds in a single day from water retention, food volume, and hormonal shifts. Weekly averages over time tell you far more than any single morning weigh-in. And pair the scale with your waist measurement. If your waist stays under 33 inches and your weight falls somewhere in the healthy range, you’re in a strong position regardless of where you land within it.