BMI Calculator
About this BMI & Calorie Calculator
Our BMI & Calorie Calculator is a precise, minimalist utility designed to help you better understand your body composition and daily energy requirements. By combining the Body Mass Index (BMI) formula with the Mifflin-St Jeor equation for Basal Metabolic Rate (BMR), this tool provides a comprehensive health overview tailored to your gender, age, and activity level.
The tool is designed for clarity and efficiency. Simply enter your physical stats, and the calculator will instantly determine your BMI category and the daily calories needed to maintain your weight. It is fully responsive and operates entirely on your device, ensuring that your sensitive health data is never stored, tracked, or sent to a remote server.
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Frequently Asked Questions
What is the BMI formula used?
We use the standard WHO (World Health Organization) formula: BMI = weight (kg) / (height (m) * height (m)). It categorizes your result into underweight, normal weight, overweight, or obesity to give you a quick health benchmark.
How are daily calories calculated?
Your daily energy requirement is calculated by determining your BMR and multiplying it by your chosen activity level. This provides an estimate of your TDEE (Total Daily Energy Expenditure), helping you understand your nutritional needs for weight maintenance.
Is my data private?
Absolutely. All calculations are performed locally in your browser. We do not store your age, weight, or height data, and no cookies are used to track your health metrics. Your inputs remain private to your machine.
Is BMI an accurate measure for everyone?
BMI is a useful screening tool but does not account for muscle mass, bone density, or body fat distribution. It is intended for general guidance; for specific health concerns, we always recommend consulting with a medical professional.