A Basal Metabolic Rate (BMR) calculator is an online tool that helps estimate an individual's BMR based on various factors, including their age, sex, weight, and height. BMR is the amount of energy expended while at rest in a neutrally temperate environment, in the post-absorptive state (meaning that the digestive system is empty).
Here's how a BMR calculator typically works:
1. Input: The user enters their age, sex, weight in kilograms, and height in meters using the calculator's input fields.
2. Calculation: The calculator then calculates the user's BMR using the Harris-Benedict equation, which takes into account the factors mentioned above. The equation is as follows:
* For men: BMR = 88.362 + (13.397 × weight in kg) + (4.799 × height in cm) - (5.677 × age in years)
* For women: BMR = 447.593 + (9.247 × weight in kg) + (3.098 × height in cm) - (4.330 × age in years)
3. Result: The calculator displays the user's BMR, which represents the number of calories they would burn if they were at rest in a neutrally temperate environment, in the post-absorptive state.
4. Interpretation: The calculator may also provide additional information or recommendations based on the user's BMR, such as the number of calories they would need to consume to maintain their current weight or to lose weight. It's important to note that BMR is just an estimate and does not take into account factors such as physical activity, metabolism, or individual variations. It is always recommended to consult with a healthcare professional or a registered dietitian for a more accurate assessment of your metabolism and caloric needs.