The Calorie Burn Rate Calculator helps you estimate the number of calories you burn during a specific physical activity. This calculation is based on several factors: your body weight, the duration of the activity, and its intensity. The intensity is represented by the Metabolic Equivalent of Task (MET) value.
Weight: The heavier you are, the more energy (calories) your body expends to perform any given activity. This calculator uses weight in kilograms (kg).
Duration: The longer you engage in an activity, the more calories you will burn. This is measured in minutes.
MET Value: The MET value is a measure of the energy expenditure of a physical activity compared to resting metabolism. A MET value of 1 is equivalent to sitting quietly. Activities with higher MET values are more intense and burn more calories. For example, walking at a moderate pace might have a MET value of around 3.5, while running vigorously could have a MET value of 10 or more. You can find MET values for a wide range of activities online or in fitness resources.
The Formula: The most common formula used to estimate calorie burn is:
Calories Burned = (MET value × Body Weight in kg × 3.5) / 200 × Duration in minutes
This calculator applies this formula to give you an approximate calorie expenditure. Remember that this is an estimate, and individual results can vary based on factors like fitness level, age, sex, and environmental conditions.
function calculateCalorieBurn() {
var weight = parseFloat(document.getElementById("weight").value);
var duration = parseFloat(document.getElementById("duration").value);
var metValue = parseFloat(document.getElementById("metValue").value);
var resultElement = document.getElementById("result");
resultElement.innerHTML = ""; // Clear previous results
if (isNaN(weight) || weight <= 0) {
resultElement.innerHTML = "Please enter a valid weight greater than 0.";
return;
}
if (isNaN(duration) || duration <= 0) {
resultElement.innerHTML = "Please enter a valid duration greater than 0 minutes.";
return;
}
if (isNaN(metValue) || metValue <= 0) {
resultElement.innerHTML = "Please enter a valid MET value greater than 0.";
return;
}
// Formula: Calories Burned = (MET value × Body Weight in kg × 3.5) / 200 × Duration in minutes
var caloriesBurned = (metValue * weight * 3.5) / 200 * duration;
resultElement.innerHTML = "Estimated Calories Burned: " + caloriesBurned.toFixed(2) + " kcal";
}