BMR Calculator
Estimate basal metabolic rate with Mifflin–St Jeor and Harris–Benedict formulas.
BMI Calculator
Calculate Body Mass Index with metric or imperial units, category, and healthy weight range.
Introduction
The Body Mass Index (BMI) calculator estimates whether your weight is within a healthy range for your height. BMI is widely used in public health screening because it is simple, fast, and based on a standardized formula adopted by organizations such as the WHO. Enter height and weight in metric (cm, kg) or imperial (in, lb) units to receive your BMI value, category classification, and an estimated healthy weight band. While BMI does not measure body composition directly, it remains a useful starting point for conversations about weight, nutrition, and lifestyle.
Benefits
- Quick weight-status screening
- Supports metric and imperial
- Shows healthy weight targets
Educational wellness tool only — not medical advice. Consult a qualified healthcare professional for personal decisions.
How It Works
- Choose metric or imperial units
- Enter height and weight
- Review BMI, category, healthy range, and chart
Formula Used
BMI = weight (kg) / [height (m)]²
Examples
Example: 170 cm and 68 kg → BMI ≈ 23.5 (Normal weight). Healthy range ≈ 53.5–72.0 kg.
Frequently Asked Questions
Is BMI accurate for athletes?
BMI can overestimate body fat in muscular athletes because it does not distinguish muscle from fat. Use additional measures such as body-fat percentage.
What BMI is considered normal?
For most adults, 18.5–24.9 is classified as normal weight.
Can children use this calculator?
Child BMI needs age- and sex-specific percentiles. Prefer the Child Growth Calculator.