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Calculate your BMI, WHO category, and healthy weight range
The BMI Calculator computes your Body Mass Index from your height and weight. Get an instant assessment of whether your weight falls within a healthy range.
You enter your weight and height in metric or imperial units. The tool calculates your BMI value and places it into the standard WHO categories: underweight, normal, overweight, or obese. It provides a clear, immediate health reference point.
BMI is a widely used screening tool for weight-related health risks. While it is not a complete health picture, it gives you a quick data point to discuss with a healthcare provider or use as a baseline for fitness goals.
Track BMI alongside diet and exercise routines to monitor progress.
Use BMI as one metric among several when evaluating body composition changes.
Check whether a child's growth is tracking within normal ranges using age-appropriate charts.
Perform quick BMI assessments during routine check-ins or triage.
After the holidays, someone weighing 78 kg at 175 cm tall calculates a BMI of 25.5, placing them just into the overweight category, prompting a conversation with their doctor about adjustments.
A person starting a training program records their BMI monthly. A drop from 28.1 to 26.3 over four months confirms meaningful progress even when the scale does not feel like it is moving.
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Calculate your Body Mass Index