Most articles bury the answer under confusing formulas. We’ll give you the numbers upfront, then explain the context so you can use them wisely.
What Is BMI and Why Does It Matter?
Body Mass Index (BMI) is a number calculated from your height and weight. It’s the most widely used screening tool to assess whether you’re underweight, at a healthy weight, overweight, or obese — and it’s the basis for every healthy-weight chart you’ll find.
BMI Formula
Or in metric: BMI = Weight in kg ÷ Height in m²
BMI Categories for Adults (Age 20+)
| BMI Range | Category | What It Means |
|---|---|---|
| Below 18.5 | ⚠️ Underweight | May signal nutritional deficiencies |
| 18.5 – 24.9 | ✅ Healthy Weight | Lowest risk of weight-related disease |
| 25.0 – 29.9 | 🟡 Overweight | Elevated risk of some conditions |
| 30.0+ | 🔴 Obese | Higher risk of diabetes, heart disease |
The CDC considers a BMI between 18.5 and 24.9 the healthy range for all adults over 20.
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Calculate My BMI Free →Healthy Weight Chart for Women by Height
The table below shows the healthy weight range for women at common heights, based on a BMI of 18.5–24.9.
| Height | Underweight (<18.5 BMI) | ✅ Healthy Weight Range | Overweight (>25 BMI) |
|---|---|---|---|
| 5’0″ | Below 94 lbs | 94 – 123 lbs | 128+ lbs |
| 5’1″ | Below 97 lbs | 97 – 127 lbs | 132+ lbs |
| 5’2″ | Below 101 lbs | 101 – 131 lbs | 136+ lbs |
| 5’3″ | Below 104 lbs | 104 – 135 lbs | 141+ lbs |
| 5’4″ | Below 108 lbs | 108 – 145 lbs | 145+ lbs |
| 5’5″ | Below 111 lbs | 111 – 149 lbs | 150+ lbs |
| 5’6″ ⭐ | Below 115 lbs | 115 – 154 lbs | 155+ lbs |
| 5’7″ | Below 118 lbs | 118 – 159 lbs | 160+ lbs |
| 5’8″ | Below 122 lbs | 122 – 164 lbs | 165+ lbs |
| 5’9″ | Below 125 lbs | 125 – 169 lbs | 170+ lbs |
| 5’10” | Below 129 lbs | 129 – 174 lbs | 175+ lbs |
| 5’11” | Below 133 lbs | 133 – 179 lbs | 180+ lbs |
| 6’0″ | Below 137 lbs | 137 – 183 lbs | 184+ lbs |
Ideal Weight for 5’6″ Female: A Closer Look
For a woman who is 5 feet 6 inches tall, here’s the full breakdown:
| Metric | Value |
|---|---|
| ✅ Healthy weight range | 115 – 154 lbs |
| 🎯 Average midpoint target | ~132 lbs (BMI 21.3) |
| ⚠️ Underweight threshold | Below 115 lbs |
| 🔴 Overweight threshold | Above 154 lbs |
Two women both at 5’6″ and 132 lbs can look completely different depending on their muscle-to-fat ratio. BMI is a starting point — not the final word on your health.
Ideal Weight for 5’4″, 5’7″, and 5’8″ Women
Ideal Weight for 5’4″ Female
The healthy weight range for a 5’4″ woman is 108 – 145 lbs (BMI 18.5–24.9). The midpoint is approximately 126 lbs.
Ideal Weight for 5’7″ Female
A healthy weight for a 5’7″ woman falls between 118 – 159 lbs. The typical target for most is around 138 lbs.
Ideal Weight for 5’8″ Female
For women at 5’8″, the healthy range is 122 – 164 lbs, with an average healthy midpoint of about 143 lbs.
BMI Has Limits — Here’s What Else to Consider
BMI is useful, but it’s not the full picture. Here’s why:
1. It Doesn’t Measure Body Fat Directly
An athletic woman with significant muscle may show a BMI in the “overweight” range but carry very little fat. Muscle is denser and heavier than fat — so BMI can misclassify fit people.
2. Body Fat Percentage Matters More
The American Council on Exercise (ACE) classifies body fat for women as:
| Category | Body Fat % |
|---|---|
| Essential Fat | 10 – 13% |
| Athlete | 14 – 20% |
| Fitness | 21 – 24% |
| Average / Healthy | 25 – 31% |
| Obese | 32%+ |
3. Where You Carry Fat Matters
Excess fat around the abdomen (waist above 35 inches for women) is linked to higher health risks regardless of BMI — including heart disease and type 2 diabetes.
4. Ethnicity Can Shift the Thresholds
The World Health Organization notes that people of South Asian descent may face metabolic health risks at a BMI of 23 or higher — lower than the standard threshold of 25.
4 Medical Formulas for Ideal Body Weight
Beyond BMI, doctors use these validated formulas to estimate ideal weight. Here’s how each one calculates for a 5’6″ woman:
| Formula | Calculation for 5’6″ | Result |
|---|---|---|
| Devine (1974) 45.5 kg + 2.3 kg per inch over 5′ | 45.5 + (2.3 × 6) | ~131 lbs |
| Robinson (1983) 49 kg + 1.7 kg per inch over 5′ | 49 + (1.7 × 6) | ~130 lbs |
| Miller (1983) 53.1 kg + 1.36 kg per inch over 5′ | 53.1 + (1.36 × 6) | ~135 lbs |
| BMI Midpoint | BMI 21.3 | ~132 lbs |
Tips for Reaching or Maintaining a Healthy Weight
If You’re Above the Healthy Range:
- Aim for a moderate calorie deficit of 300–500 cal/day — about 0.5–1 lb/week loss
- Prioritize protein (0.7–1g per pound of body weight) to preserve muscle
- Combine resistance training with cardio for best body composition
- Track progress with body measurements, not just the scale
If You’re Below the Healthy Range:
- Add a calorie surplus of 300–500 cal/day from nutrient-dense foods
- Focus on strength training to build lean muscle mass
- Eat frequent meals with protein, healthy fats, and complex carbs
For Everyone:
- Prioritize sleep (7–9 hours) — poor sleep disrupts hunger hormones
- Manage stress — cortisol can drive weight gain, especially around the belly
- Drink enough water — thirst is frequently mistaken for hunger
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The Bottom Line
BMI and weight charts are a helpful starting point — but your healthiest weight is the one where your body functions well, your energy is high, and your key health markers (blood pressure, blood sugar, cholesterol) are in a good range.
For a 5’6″ female, that’s typically between 115–154 lbs, with most healthy women naturally falling in the 125–145 lbs range. For other heights, use the chart above as your guide.
And remember: the number on the scale is just one data point. How you feel, move, and live matters just as much.
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Use the Free Decimaly BMI Calculator →⚕️ This article is for informational purposes only and does not constitute medical advice. Consult a qualified healthcare professional before making significant changes to your diet or exercise routine.
