Free BMI Calculator 2026 to calculate your Body Mass Index and check your healthy weight range with accurate BMI categories and chart.
Calculate your Body Mass Index (BMI) to see if you're at a healthy weight for your height.
Ready to Calculate
Enter your weight and height to see your BMI
| Category | BMI Range |
|---|---|
| Underweight | Less than 18.5 |
| Normal Weight | 18.5 – 24.9 |
| Overweight | 25 – 29.9 |
| Obese | 30 or greater |
Body Mass Index is calculated using your weight and height.
BMI = weight (kg) / height² (m²)
Or: BMI = (weight (lbs) / height² (inches²)) × 703
A healthy BMI typically falls between 18.5 and 24.9. However, BMI is just one indicator of health and should be considered alongside other factors.
BMI is a useful screening tool but may not be accurate for athletes, pregnant women, elderly individuals, or those with high muscle mass.
For general health monitoring, checking your BMI monthly or quarterly is sufficient. Consult with healthcare providers for personalized advice.
This calculator is designed for adults. Children and teens require age and gender-specific BMI percentile calculations.