Know your body by the numbers.
From body fat to calorie needs, from macro splits to hydration goals — calculate your full body composition in a few steps.
What is BMI?
BMI, or Body Mass Index, is a value calculated from your weight relative to your height. It is a screening measure widely used to classify underweight, normal range, overweight or obesity. However, since it does not distinguish between fat, muscle and bone mass, it cannot on its own precisely indicate your body fat percentage or overall health.
Looks simple, calculates deep.
Questions on your mind
No. BMI uses only height and weight; it does not separate fat, muscle and bone. Body fat percentage, on the other hand, estimates the percentage of fat in your body from circumference measurements.
Calxin evaluates your measurements with widely used methods such as Mifflin–St Jeor and US Navy. When you enter your information correctly, you get a clear reference for your body composition, daily energy needs and goal. Results may vary depending on the measurement method and individual differences.
The Mifflin-St Jeor equation is used for calories and metabolism, and the U.S. Navy circumference method is used for body fat percentage.
No. No information is sent to a server or saved; all calculations are performed only in your browser.