.calorie-calculator-food-container {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
max-width: 700px;
margin: 20px auto;
padding: 25px;
border: 1px solid #e0e0e0;
border-radius: 10px;
background-color: #ffffff;
box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
color: #333;
}
.calorie-calculator-food-container h2 {
color: #2c3e50;
text-align: center;
margin-bottom: 25px;
font-size: 28px;
font-weight: 600;
}
.calorie-calculator-food-container .input-group {
margin-bottom: 18px;
display: flex;
flex-direction: column;
}
.calorie-calculator-food-container label {
margin-bottom: 8px;
font-weight: 500;
color: #555;
font-size: 16px;
}
.calorie-calculator-food-container input[type="number"] {
width: 100%;
padding: 12px;
border: 1px solid #ccc;
border-radius: 6px;
box-sizing: border-box;
font-size: 16px;
color: #333;
transition: border-color 0.3s ease;
}
.calorie-calculator-food-container input[type="number"]:focus {
border-color: #007bff;
outline: none;
box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.25);
}
.calorie-calculator-food-container button {
background-color: #28a745;
color: white;
padding: 14px 25px;
border: none;
border-radius: 6px;
cursor: pointer;
font-size: 18px;
font-weight: 600;
width: 100%;
transition: background-color 0.3s ease, transform 0.2s ease;
margin-top: 20px;
}
.calorie-calculator-food-container button:hover {
background-color: #218838;
transform: translateY(-2px);
}
.calorie-calculator-food-container .result {
margin-top: 30px;
padding: 18px;
border: 1px solid #d4edda;
background-color: #e9f7ef;
border-radius: 8px;
text-align: center;
font-size: 20px;
color: #155724;
font-weight: 600;
}
.calorie-calculator-food-container .result strong {
color: #0f5132;
}
.calorie-calculator-food-container p {
line-height: 1.6;
margin-bottom: 15px;
color: #444;
}
.calorie-calculator-food-container h3 {
color: #2c3e50;
margin-top: 30px;
margin-bottom: 15px;
font-size: 22px;
font-weight: 600;
}
.calorie-calculator-food-container ul {
list-style-type: disc;
margin-left: 20px;
margin-bottom: 15px;
color: #444;
}
.calorie-calculator-food-container ul li {
margin-bottom: 8px;
}
Food Calorie Calculator
function calculateCalories() {
var protein = parseFloat(document.getElementById('proteinGrams').value);
var carbs = parseFloat(document.getElementById('carbGrams').value);
var fat = parseFloat(document.getElementById('fatGrams').value);
var alcohol = parseFloat(document.getElementById('alcoholGrams').value);
// Handle NaN or empty inputs by treating them as 0
protein = isNaN(protein) ? 0 : protein;
carbs = isNaN(carbs) ? 0 : carbs;
fat = isNaN(fat) ? 0 : fat;
alcohol = isNaN(alcohol) ? 0 : alcohol;
// Ensure values are non-negative
protein = Math.max(0, protein);
carbs = Math.max(0, carbs);
fat = Math.max(0, fat);
alcohol = Math.max(0, alcohol);
// Caloric values per gram:
// Protein: 4 kcal/g
// Carbohydrates: 4 kcal/g
// Fat: 9 kcal/g
// Alcohol: 7 kcal/g
var totalCalories = (protein * 4) + (carbs * 4) + (fat * 9) + (alcohol * 7);
document.getElementById('calorieResult').innerHTML = "
Total Calories: " + totalCalories.toFixed(2) + " kcal";
}
Understanding Food Calories
Calories are a unit of energy. In the context of nutrition, they represent the amount of energy your body gets from food and drinks. This energy is essential for all bodily functions, from breathing and thinking to exercising and maintaining body temperature.
The total caloric content of a food item is determined by its macronutrient composition. Macronutrients are the nutrients your body needs in large amounts, namely protein, carbohydrates, and fats. Alcohol also contributes significantly to caloric intake.
How Macronutrients Contribute to Calories:
- Protein: Provides approximately 4 calories per gram. Proteins are crucial for building and repairing tissues, making enzymes and hormones, and supporting immune function.
- Carbohydrates: Also provide about 4 calories per gram. Carbohydrates are the body's primary source of energy, fueling your brain, muscles, and other organs.
- Fat: The most calorie-dense macronutrient, providing about 9 calories per gram. Fats are vital for hormone production, nutrient absorption, and protecting organs.
- Alcohol: Contributes approximately 7 calories per gram. While not a macronutrient, alcohol provides significant energy but offers minimal nutritional value.
Using This Calculator
This Food Calorie Calculator allows you to determine the total caloric content of a specific food item or meal based on its macronutrient breakdown. You can find these values on nutrition labels of packaged foods or through reliable food composition databases for whole foods.
Simply enter the grams of protein, carbohydrates, fat, and (if applicable) alcohol into the respective fields. The calculator will then apply the standard caloric conversion factors to give you the total calories (kcal) for that food portion.
Example Calculation:
Let's say you have a snack with the following nutritional information:
- Protein: 10 grams
- Carbohydrates: 25 grams
- Fat: 8 grams
- Alcohol: 0 grams
Using the calculator:
- Protein calories: 10g * 4 kcal/g = 40 kcal
- Carbohydrate calories: 25g * 4 kcal/g = 100 kcal
- Fat calories: 8g * 9 kcal/g = 72 kcal
- Alcohol calories: 0g * 7 kcal/g = 0 kcal
Total Calories: 40 + 100 + 72 + 0 = 212 kcal
This tool is useful for tracking your intake, understanding food labels, and making informed dietary choices.