:root {
–primary-blue: #004a99;
–success-green: #28a745;
–light-background: #f8f9fa;
–dark-text: #333;
–border-color: #dee2e6;
}
body {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
background-color: var(–light-background);
color: var(–dark-text);
margin: 0;
padding: 20px;
display: flex;
justify-content: center;
align-items: flex-start; /* Align items to the top */
min-height: 100vh;
box-sizing: border-box;
}
.loan-calc-container {
background-color: #ffffff;
border-radius: 8px;
box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
padding: 30px;
width: 100%;
max-width: 700px;
box-sizing: border-box;
margin-bottom: 30px; /* Space between calculator and article */
}
h1 {
color: var(–primary-blue);
text-align: center;
margin-bottom: 25px;
font-weight: 600;
}
.input-group {
margin-bottom: 20px;
display: flex;
flex-direction: column;
align-items: flex-start;
}
.input-group label {
display: block;
margin-bottom: 8px;
font-weight: 500;
color: var(–dark-text);
font-size: 0.95em;
}
.input-group input[type="number"],
.input-group input[type="range"] {
width: calc(100% – 20px); /* Adjusted for padding */
padding: 12px 10px;
border: 1px solid var(–border-color);
border-radius: 4px;
font-size: 1em;
box-sizing: border-box;
margin-top: 5px;
}
.input-group input[type="range"] {
cursor: pointer;
}
button {
background-color: var(–primary-blue);
color: white;
border: none;
padding: 12px 25px;
border-radius: 5px;
font-size: 1.1em;
cursor: pointer;
width: 100%;
transition: background-color 0.3s ease;
margin-top: 10px;
}
button:hover {
background-color: #003366;
}
#result {
background-color: var(–success-green);
color: white;
padding: 20px;
border-radius: 5px;
text-align: center;
margin-top: 30px;
font-size: 1.5em;
font-weight: bold;
box-shadow: 0 2px 10px rgba(40, 167, 69, 0.4);
}
#result span {
font-size: 0.8em;
display: block;
margin-top: 5px;
}
/* Article Styling */
.article-container {
background-color: #ffffff;
border-radius: 8px;
box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
padding: 30px;
width: 100%;
max-width: 700px;
box-sizing: border-box;
margin-top: 20px; /* Space between calculator and article */
line-height: 1.6;
color: var(–dark-text);
}
.article-container h2 {
color: var(–primary-blue);
margin-bottom: 15px;
border-bottom: 2px solid var(–border-color);
padding-bottom: 5px;
font-weight: 600;
}
.article-container h3 {
color: var(–primary-blue);
margin-top: 20px;
margin-bottom: 10px;
font-weight: 500;
}
.article-container p {
margin-bottom: 15px;
}
.article-container code {
background-color: var(–light-background);
padding: 2px 5px;
border-radius: 3px;
font-family: Consolas, Monaco, 'Andale Mono', 'Ubuntu Mono', monospace;
}
/* Responsive Adjustments */
@media (max-width: 768px) {
.loan-calc-container, .article-container {
padding: 20px;
}
h1 {
font-size: 1.8em;
}
button {
font-size: 1em;
padding: 10px 20px;
}
#result {
font-size: 1.3em;
}
}
Understanding Calorie Burn During Running
Running is a highly effective cardiovascular exercise that burns a significant amount of calories. The exact number of calories burned during a run depends on several factors, including your body weight, the distance you cover, the duration of your run, and your pace. This calculator helps you estimate your calorie expenditure based on these key metrics.
The Science Behind Calorie Calculation
The most common and practical way to estimate calorie burn during running involves using formulas that account for your body weight and the intensity or distance covered. A widely accepted approximation uses the concept of Metabolic Equivalents (METs), though a simpler, effective method for running focuses on weight and distance.
A common formula to estimate calories burned per kilometer is:
Calories per km ≈ 0.75 * Weight (kg)
This formula suggests that for every kilogram of body weight, approximately 0.75 calories are burned per kilometer run.
Another approach, which also considers pace and duration, is based on the MET value of running. The MET value for running varies significantly with pace. A moderate running pace (around 8-10 minutes per mile, or 5-6 minutes per kilometer) typically has a MET value of around 8.0 to 10.0.
The general formula for calorie expenditure using METs is:
Calories per minute = (MET value * Body Weight (kg) * 3.5) / 200
This calculator uses a combined approach. It primarily leverages the distance and weight for a core estimate, and uses duration and pace to refine the understanding of intensity, which implicitly affects the MET value used in more complex models. For simplicity and practical use, we'll focus on the distance-based estimation, acknowledging that faster paces (shorter duration for same distance) generally burn slightly more calories per minute but the total might be similar or slightly different based on exact MET values. The provided calculator uses a factor that is commonly cited for running.
How the Calculator Works
Our calculator takes your weight in kilograms, the distance you've run in kilometers, and your average pace in minutes per kilometer. It then applies an established formula to estimate the total calories burned:
Total Calories Burned ≈ Weight (kg) * Distance (km) * Calorie Factor
The "Calorie Factor" used in this calculator is approximately 1.03, which is derived from common estimations and can vary slightly based on specific running efficiency and exact MET values for your pace. This factor is a practical approximation that balances accuracy with simplicity for everyday users.
The duration and pace inputs help contextualize the run, and can be used in more advanced calculations. For this simplified calculator, the primary drivers are weight and distance.
Use Cases for the Calorie Running Calculator
- Weight Management: Track your calorie deficit by accurately estimating calories burned during your runs.
- Fitness Planning: Set realistic training goals and understand the energy expenditure of different running workouts.
- Nutrition Adjustment: Use the results to inform your dietary intake, ensuring you fuel your body appropriately for your activity level.
- Motivation: Seeing the tangible results of your effort in terms of calories burned can be a powerful motivator to stay consistent with your running routine.
Important Considerations
Remember that this calculator provides an estimate. Individual metabolic rates, running efficiency, terrain, and environmental factors (like temperature and altitude) can influence the actual number of calories you burn. For the most precise measurement, consider using a heart rate monitor or a fitness tracker that incorporates your personal data.
function calculateCalories() {
var weight = parseFloat(document.getElementById("weight").value);
var distance = parseFloat(document.getElementById("distance").value);
var duration = parseFloat(document.getElementById("duration").value); // For context, not primary calculation here
var pace = parseFloat(document.getElementById("pace").value); // For context, not primary calculation here
var burnedCalories = 0;
var explanation = "";
var resultDiv = document.getElementById("result");
var burnedCaloriesSpan = document.getElementById("burnedCalories");
var explanationSpan = document.getElementById("explanation");
// Basic validation
if (isNaN(weight) || isNaN(distance) || isNaN(duration) || isNaN(pace) || weight <= 0 || distance <= 0 || duration <= 0 || pace <= 0) {
resultDiv.style.display = "none";
alert("Please enter valid positive numbers for all fields.");
return;
}
// Simplified calculation: Calories Burned ≈ Weight (kg) * Distance (km) * Calorie Factor
// A commonly cited factor for running is around 1.03 kcal/kg/km
var calorieFactor = 1.03;
burnedCalories = weight * distance * calorieFactor;
// Round to nearest whole number for display
burnedCalories = Math.round(burnedCalories);
explanation = "Estimated based on your weight, distance, and a standard calorie factor for running.";
burnedCaloriesSpan.textContent = burnedCalories;
explanationSpan.textContent = explanation;
resultDiv.style.display = "block";
}