How Much Should I Weigh? Healthy Weight by Height and Age

There is no single number that answers "how much should I weigh." A healthy weight is a range determined mainly by your height, and for most adults that range is defined by a Body Mass Index (BMI) of 18.5 to 24.9, the standard used by the CDC and the World Health Organization. For a person who is 5 ft 4 in tall, that range runs from about 108 to 145 lb (49 to 66 kg). This guide gives you the full table for every common height, explains what the range means for men and women, addresses how age fits in, and describes what BMI does not capture.

This article is general health information and is not a substitute for professional medical advice. If you have concerns about your weight or health, consult a doctor or registered dietitian.

The CDC defines BMI as a person's weight in kilograms divided by the square of their height in meters. It is not a direct measure of body fat, but it is a widely used screening tool because it correlates reasonably well with body fatness in large populations. The NIH National Heart, Lung, and Blood Institute (NHLBI) and the WHO both endorse the same four-category system: underweight, healthy, overweight, and obese. Understanding which category you fall into is a starting point, not a verdict.

BMI categories at a glance

The table below shows the standard BMI categories used by the CDC, WHO, and the NIH/NHLBI. These thresholds apply to adults aged 20 and older, regardless of sex.

The "healthy weight" row is the one this article focuses on. For every height in the table further below, the lb and kg figures shown are exactly the weights that produce a BMI between 18.5 and 24.9. If your weight falls anywhere within that span for your height, you are in the healthy range by this measure.

Healthy weight by height: the full table

The ranges below are derived from the WHO healthy BMI band of 18.5 to 24.9 and are the same figures used in the NHLBI's classic healthy-weight guidelines. They apply to adult men and women equally. For a more detailed chart covering additional heights and showing both men and women side by side, see our height and weight chart.

Each row spans about 30 to 53 lb, which is a substantial range. Landing anywhere within it for your height is considered healthy by this measure. The width of the range reflects the natural variation in lean mass, bone density, and body frame that exists among healthy adults of the same height.

Is the range different for men and women?

No. The healthy BMI band of 18.5 to 24.9 is identical for adult men and women at every height. A man and a woman who are both 5 ft 8 in tall share the same healthy weight range of 122 to 164 lb (55 to 74 kg). This is the standard used by the CDC, WHO, and the NIH/NHLBI.

Where men and women typically differ is in where within the range they naturally sit. Men, on average, carry more lean muscle mass than women of the same height, which means men often fall in the upper portion of the range. Women, whose bodies carry a higher percentage of essential fat, often sit in the lower to middle portion. Both positions are healthy. The biology of body composition explains the pattern, but neither end of the range is reserved for one sex. For an in-depth look at the numbers by sex, see our height and weight chart.

What about healthy weight by age?

This is one of the most commonly misunderstood questions. The short answer from the CDC is that for adults aged 20 and older, the healthy BMI range does not change with age. A 25-year-old and a 65-year-old of the same height use exactly the same table.

The longer answer is that body composition does shift across a lifetime, even when BMI stays constant. As people age, lean muscle mass tends to decrease and body fat tends to increase, a process called sarcopenia. This means that two people with identical BMIs at age 30 and age 65 will have different body compositions. Some researchers and certain clinical guidelines (including those referenced by the Better Health Channel, an Australian government resource) suggest that a BMI slightly toward the upper end of the healthy range, around 22 to 26, may be acceptable for adults over about 74, partly because lower BMI in older adults has been associated with frailty and bone-density loss. These are nuances worth discussing with a doctor, not reasons to ignore the standard range entirely.

Children and teenagers are a genuinely different case. The CDC and WHO do not apply fixed BMI cutoffs to people aged 2 to 19. Instead, children's BMI is plotted on age- and sex-specific growth charts, and the healthy range is defined as the 5th to 85th percentile. A number that would be healthy for an adult can mean something completely different for a 10-year-old, which is why a pediatrician interprets these figures rather than a chart.

What BMI does not tell you

BMI is a practical tool with known limits. Understanding them helps you interpret your result honestly rather than over- or under-reacting to a single number.

• Muscle mass. BMI cannot separate muscle from fat. A person with high lean mass will weigh more for the same height, producing a higher BMI even if their body fat percentage is low. This is a well-documented issue for athletes and very active people, and it is why the American Medical Association advised in 2023 that BMI should be used alongside other measures rather than as a standalone metric.
• Fat distribution. Where fat is stored matters as much as how much there is. Abdominal (visceral) fat carries higher cardiovascular and metabolic risk than fat stored in the hips and thighs. Waist circumference and waist-to-height ratio capture this risk; BMI alone does not. The NIH/NHLBI considers a waist circumference above 35 inches in women and above 40 inches in men to be a risk indicator even within a healthy BMI range.
• Body frame size. People with larger bone structures carry more skeletal mass and often sit naturally toward the higher end of the healthy range. Small-framed individuals may be healthy at the lower end. The chart applies the same range to everyone of a given height regardless of frame.
• Ethnicity. The WHO recognises that people of Asian descent may face higher health risks at lower BMI values. Alternative cutoffs of 23 for overweight and 27.5 for obesity are used in some Asian-Pacific clinical settings.

For a deeper look at what BMI measures and where it falls short, see our article on what is a healthy BMI.

How to use this table and the converter

Find your height in the table above and read across to the healthy weight range in pounds or kilograms. If your current weight falls within that span, your BMI is in the healthy range by the standard definition. If it sits above or below, that is a starting point for a conversation with a healthcare provider, not a cause for alarm on its own.

The kg to lb converter embedded above is useful if your scale or your doctor's chart uses a different unit than you normally think in. Most clinical scales in the United States display pounds, while WHO and NIH reference charts run in kilograms. Enter any value and the converter translates it instantly so you can read your result straight from either column in the table. Quick values of 50, 60, 70, and 80 kg cover the most common adult weight range and let you check where each figure sits relative to the healthy band for your height.

A few practical notes when reading the table:

• Weigh yourself at the same time of day, ideally in the morning before eating, for the most consistent readings. Weight can shift by 2 to 5 lb across a single day due to food, fluid, and activity.
• A single weigh-in is less informative than an average over several days or a week. Body weight fluctuates naturally, and trend matters more than any one data point.
• If you are close to the edge of a range (a few pounds above or below), context matters more than precision. The table is a guide, not a diagnostic tool.