Free BMI Chart — Find Your BMI Category

A BMI chart is a visual reference that maps height and weight combinations to Body Mass Index categories. Traditional printed BMI charts use a grid: heights run along one axis (typically the left side or top), weights along the other, and each cell in the grid shows the corresponding BMI value or is color-coded to indicate a weight category.

The interactive version above goes further. Instead of scanning a static grid, you enter your exact measurements and immediately see your precise BMI on a color-coded scale. The visual bar shows your position relative to all six standard categories — from underweight through the three classes of obesity. This is more useful than a printed chart because it handles any height/weight combination, not just the rounded values that fit in a grid.

The color coding follows a widely recognized pattern. Blue marks the underweight zone (BMI below 18.5), where health risks include nutrient deficiency and bone loss. Green represents the normal range (18.5 to 24.9), which is associated with the lowest health risks for most adults. As the scale moves through yellow, orange, and into reds, it signals progressively higher BMI categories and statistically greater risks for conditions like type 2 diabetes, cardiovascular disease, and joint problems.

The World Health Organization defines six BMI categories for adults. Underweight (below 18.5) can indicate malnutrition, eating disorders, or underlying medical conditions. It carries real health risks including weakened immune function, anemia, and osteoporosis. Normal weight (18.5 to 24.9) is the target range where population-level data shows the lowest overall health risks.

Overweight (25 to 29.9) indicates weight above the normal range. Not everyone in this category faces health problems — someone at BMI 25.5 who exercises regularly may be perfectly healthy — but the statistical risk of weight-related conditions begins to increase. Obese Class I (30 to 34.9), Class II (35 to 39.9), and Class III (40+) represent progressively higher risk levels.

It is important to remember that these categories are population-level guidelines, not individual diagnoses. A BMI chart tells you where you fall relative to statistical norms. It does not tell you your body fat percentage, your cardiovascular fitness, or your metabolic health. Use it as a starting point — if your BMI falls outside the normal range, it is worth discussing with a healthcare provider who can assess your individual situation.

For athletes, elderly adults, and certain ethnic groups, standard BMI cutoffs may not apply. Some countries in Asia, for example, use lower thresholds because health risks emerge at lower BMI values in those populations. A healthcare professional can help determine which standards are most appropriate for you.