Looking for a quick way to understand whether your current body weight is in a healthy range for your height? Use the calculator below to estimate your BMI (Body Mass Index), see your BMI category, and view a healthy target weight range based on standard BMI guidelines.
Body Weight & Height Calculator
Enter your weight and height to calculate BMI and healthy weight range.
What this calculator tells you
This tool uses your body weight and height to estimate BMI, one of the most common health screening metrics in medicine, fitness, and public health. It can help you quickly understand whether your current weight is below, within, or above a standard healthy range for your height.
In addition to BMI, the calculator estimates a healthy weight range by applying BMI values from 18.5 to 24.9. This gives you a practical target zone you can use for planning nutrition, exercise, and long-term wellness goals.
How BMI is calculated
The formula
BMI is calculated by dividing weight in kilograms by height in meters squared: BMI = kg / (m²).
If you enter values in pounds, feet, inches, or centimeters, this calculator converts those units automatically to keep calculations accurate.
Standard BMI categories
- Underweight: BMI below 18.5
- Healthy weight: BMI 18.5 to 24.9
- Overweight: BMI 25.0 to 29.9
- Obesity Class I: BMI 30.0 to 34.9
- Obesity Class II: BMI 35.0 to 39.9
- Obesity Class III: BMI 40.0 and above
How to use your results in real life
1) Set realistic goals
If your result is outside the healthy range, focus on gradual progress. For many adults, even a modest change in body weight can improve blood pressure, blood sugar, mobility, and daily energy.
2) Track trends, not single numbers
Weight naturally fluctuates from day to day due to hydration, meals, and hormones. Weigh yourself under similar conditions and look for a trend over weeks, not daily ups and downs.
3) Pair with healthy habits
- Prioritize whole foods and adequate protein.
- Build a weekly routine with strength training and cardio.
- Sleep 7-9 hours when possible.
- Stay hydrated and limit ultra-processed snacks.
- Use step goals to increase daily movement.
Important limitations to understand
BMI is useful, but it is not a perfect measure of health for every person. It does not directly measure body fat, muscle mass, bone density, or fat distribution.
- A very muscular person may have a high BMI but low body fat.
- Older adults may have normal BMI but lower muscle mass than ideal.
- Waist circumference and metabolic markers can add important context.
- Medical history, medications, and lifestyle should always be considered.
For personalized advice, especially if you have diabetes, heart disease, thyroid conditions, or other chronic concerns, consult a qualified healthcare professional.
Example
Suppose someone is 170 cm tall and weighs 75 kg. Their BMI is approximately 26.0, which falls in the overweight category by standard criteria. A healthy BMI-based weight range for 170 cm is roughly 53.5 kg to 71.9 kg. This does not diagnose disease, but it provides a practical benchmark.
Frequently asked questions
Is BMI the same as body fat percentage?
No. BMI estimates weight relative to height, while body fat percentage estimates how much of your body is fat tissue.
Can I use this calculator if I use imperial units?
Yes. Enter pounds and inches or feet, and the tool will convert everything automatically before calculating.
How often should I check my BMI?
Monthly or every few weeks is usually enough for most people. Daily checks are often unnecessary and can be misleading.