A healthy weight for a 22-year-old woman depends almost entirely on her height. For example, a woman who is 5’4″ generally falls in the healthy range between about 110 and 145 pounds, while a woman who is 5’7″ would be healthy between roughly 120 and 155 pounds. These ranges come from BMI guidelines, which place a “healthy weight” at a BMI of 18.5 to 24.9. But the number on the scale is only one piece of the picture.
Healthy Weight Ranges by Height
The most straightforward way to find your target range is to use BMI boundaries. A BMI between 18.5 and 24.9 is classified as healthy weight for any adult 20 or older. Below 18.5 is underweight, 25 to 29.9 is overweight, and 30 or above is classified as obesity. Here’s what those BMI cutoffs translate to in pounds at common heights:
- 5’0″: 95 to 127 lbs
- 5’2″: 104 to 136 lbs
- 5’4″: 110 to 145 lbs
- 5’6″: 118 to 155 lbs
- 5’8″: 126 to 164 lbs
- 5’10”: 132 to 174 lbs
These ranges are wide for a reason. Two women at the same height can weigh 30 pounds apart and both be perfectly healthy, because muscle mass, bone structure, and body composition vary significantly from person to person.
What “Ideal Body Weight” Formulas Say
Doctors sometimes use formulas to estimate a single target weight rather than a range. The most common one, the Hamwi formula, works like this for women: start at 100 pounds for the first 5 feet of height, then add 5 pounds for every inch above that. So a 5’5″ woman would get an estimate of 125 pounds. The Devine formula, another widely used version, produces slightly different numbers, giving that same 5’5″ woman about 127 pounds.
These formulas were originally designed for medication dosing, not as health targets, so treat them as rough midpoints rather than goals. They don’t account for muscle, frame size, or ethnicity, and they tend to underestimate healthy weight for taller women and overestimate it for shorter women. A newer universal equation developed by researchers attempts to fix some of these issues by tying the calculation directly to a target BMI, but no single formula captures the full picture.
Why BMI Doesn’t Tell the Whole Story
BMI is a useful screening tool, but it has a well-known blind spot: it can’t distinguish between fat and muscle. Research on female college athletes shows that increased muscle mass frequently pushes their BMI into the “overweight” or even “obese” category despite their having low body fat. If you strength train, play sports, or carry more muscle than average, your BMI may overstate your health risk.
The reverse is also true. A person can have a “normal” BMI while carrying a higher proportion of body fat and less muscle, a pattern sometimes called “normal weight obesity.” This combination is associated with many of the same metabolic risks as being overweight by BMI standards.
Body Fat Percentage as an Alternative
Body fat percentage gives a more direct look at composition than weight alone. There’s no universally agreed-upon “ideal” range, but a large 2025 study using national survey data defined overweight for women as a body fat percentage of 36% or higher and obesity as 42% or higher. That means staying below roughly 36% body fat places most women in a healthy range, though athletic women often sit well below that, typically between 18% and 28%.
You can estimate body fat through methods like skinfold calipers, bioelectrical impedance scales (common in gyms and home scales), or more precise tools like DEXA scans. Home scales that measure body fat aren’t perfectly accurate, but tracking trends over time can still be useful.
Waist-to-Height Ratio
One of the simplest measures you can do at home with a tape measure is the waist-to-height ratio. Divide your waist circumference by your height (both in the same unit). Research published in PLOS One found this ratio was more predictive of years of life lost than BMI alone. For women, the optimal ratio is around 0.46, with minimal added health risk anywhere between 0.4 and 0.5. Above 0.5, cardiovascular and metabolic risks start climbing, and above 0.6, the risk is substantially elevated.
For a 5’4″ woman (64 inches), that means a waist measurement under 32 inches keeps you in the low-risk zone. This measurement captures something BMI misses: where your body stores fat. Fat around the midsection is more metabolically active and more strongly linked to heart disease and diabetes than fat stored in the hips or thighs.
What’s Happening in Your Body at 22
Age 22 is a meaningful moment for your skeleton. Research tracking bone development found that women reach peak bone mineral density right around age 22, with a median age of 22.3 years. Your bones are at their densest and heaviest, which is a good thing. Adequate weight, calcium intake, and physical activity during this window help lock in bone strength that protects you for decades. Being significantly underweight at this age can compromise that peak, increasing the risk of osteoporosis later in life.
This is also the age when many women transition from the structured activity of school years to more sedentary routines, whether through desk jobs, graduate school, or lifestyle changes. Weight gained during this transition tends to be fat rather than muscle, so staying active matters more than the number on the scale.
What Actually Matters More Than a Number
Your weight is one data point, not a verdict. A 22-year-old woman at 160 pounds who strength trains three times a week, walks daily, and eats a varied diet is in a very different health position than someone at 130 pounds who is sedentary and skipping meals. The metrics that correlate most strongly with long-term health include waist circumference, blood pressure, blood sugar, and cardiorespiratory fitness, not body weight alone.
If you’re looking for a starting point, find your height on the BMI chart above, note the healthy range, then consider whether your body composition, activity level, and energy throughout the day feel right. A stable weight where you feel strong, sleep well, and have consistent energy is a better target than any formula can provide.