Nutritional Information Calculator
body {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
background-color: #f8f9fa;
color: #333;
line-height: 1.6;
margin: 0;
padding: 20px;
}
.calculator-container {
max-width: 800px;
margin: 30px auto;
background-color: #ffffff;
padding: 30px;
border-radius: 8px;
box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
border: 1px solid #e0e0e0;
}
h1, h2 {
color: #004a99;
text-align: center;
margin-bottom: 20px;
}
.input-section, .result-section {
margin-bottom: 25px;
padding: 20px;
border: 1px solid #e0e0e0;
border-radius: 5px;
background-color: #fdfdfd;
}
.input-group {
margin-bottom: 15px;
display: flex;
align-items: center;
flex-wrap: wrap; /* Allows wrapping on smaller screens */
}
.input-group label {
flex: 1 1 150px; /* Flex properties for label */
margin-right: 10px;
font-weight: 500;
color: #004a99;
text-align: right; /* Aligns labels to the right */
}
.input-group input[type="number"] {
flex: 2 1 200px; /* Flex properties for input */
padding: 10px;
border: 1px solid #ccc;
border-radius: 4px;
font-size: 1rem;
box-sizing: border-box; /* Include padding and border in element's total width and height */
}
.input-group span.unit {
margin-left: 10px;
font-style: italic;
color: #555;
}
button {
display: block;
width: 100%;
padding: 12px 20px;
background-color: #004a99;
color: white;
border: none;
border-radius: 4px;
font-size: 1.1rem;
cursor: pointer;
transition: background-color 0.3s ease;
margin-top: 10px;
}
button:hover {
background-color: #003366;
}
#result {
background-color: #e7f3fe;
color: #004a99;
font-size: 1.5rem;
font-weight: bold;
padding: 15px;
text-align: center;
border-radius: 5px;
border: 2px dashed #004a99;
margin-top: 20px;
}
#result-details {
margin-top: 20px;
font-size: 0.9rem;
color: #555;
text-align: center;
}
.article-content {
margin-top: 40px;
padding: 25px;
background-color: #ffffff;
border-radius: 8px;
box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
border: 1px solid #e0e0e0;
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.article-content h2 {
text-align: left;
color: #004a99;
margin-bottom: 15px;
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.article-content p {
margin-bottom: 15px;
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.article-content ul {
margin-left: 20px;
margin-bottom: 15px;
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.article-content li {
margin-bottom: 8px;
}
/* Responsive adjustments */
@media (max-width: 600px) {
.input-group {
flex-direction: column; /* Stack labels and inputs */
align-items: stretch; /* Stretch to fill width */
}
.input-group label {
text-align: left; /* Align labels to the left on small screens */
margin-bottom: 5px;
flex-basis: auto; /* Reset flex-basis */
}
.input-group input[type="number"] {
flex-basis: auto; /* Reset flex-basis */
width: 100%; /* Ensure input takes full width */
}
.input-group span.unit {
margin-left: 0; /* Remove margin */
margin-top: 5px; /* Add margin top */
}
button {
font-size: 1rem;
}
.calculator-container {
padding: 20px;
}
h1 {
font-size: 1.8rem;
}
}
Nutritional Information Calculator
Your Nutritional Information
—
Understanding Nutritional Information
The Nutritional Information Calculator is a valuable tool for individuals, food businesses, and health professionals to determine the macronutrient and calorie content of food items based on standardized serving sizes and desired quantities. Accurate nutritional data is crucial for managing diets, creating food labels, and understanding the energy and nutrient balance of what we consume.
How it Works: The Math Behind the Calculator
This calculator operates on a simple principle of proportionality. It takes the nutritional values provided for a standard serving size and scales them up or down based on the 'Desired Quantity' input. The core logic involves the following calculations:
-
Scaling Factor: The calculator first determines how the 'Desired Quantity' compares to the 'Serving Size'. This is calculated as:
Scaling Factor = Desired Quantity / Serving Size
For example, if the standard serving size is 100 grams and you want to calculate for 250 grams, the scaling factor would be 250 / 100 = 2.5.
-
Nutrient Calculation: Each nutritional component (Calories, Protein, Carbohydrates, Fat, Fiber, Sugar) is then multiplied by this Scaling Factor to find the total amount in the desired quantity.
Total Nutrient = Nutrient per Serving * Scaling Factor
For instance, if a serving has 150 kcal and the scaling factor is 2.5, the total calories would be 150 * 2.5 = 375 kcal.
-
Unit Adjustment: The units for the 'Desired Quantity' (e.g., servings) are also adjusted. If the 'Desired Quantity' is specified in grams and the 'Serving Size' is in grams, the final output for those nutrients will be in grams. If the 'Desired Quantity' is in servings and the 'Serving Size' is in grams, the calculation usually assumes the user wants the nutrient breakdown for a quantity equivalent to X servings, where each serving is the specified size. In this calculator, 'Desired Quantity' is directly interpreted in "servings", so the scaling factor is simply the number of servings desired.
Key Nutritional Components:
- Calories (kcal): The energy provided by the food.
- Protein (g): Essential for building and repairing tissues.
- Carbohydrates (g): The body's primary source of energy.
- Fat (g): Important for energy, hormone production, and nutrient absorption.
- Fiber (g): Aids digestion and helps regulate blood sugar.
- Sugar (g): A type of carbohydrate; excessive intake can be detrimental to health.
Use Cases:
- Dietary Planning: Helps individuals track their intake of macronutrients and calories to meet specific health or fitness goals.
- Food Labeling: Assists food manufacturers in calculating and displaying accurate nutritional information on product packaging.
- Recipe Analysis: Allows chefs and home cooks to understand the nutritional profile of their creations.
- Health Education: Provides a clear way to explain the nutritional impact of different food portions.
- Portion Control: Empowers users to make informed decisions about how much of a particular food item they consume.
By providing precise calculations based on user-inputted data, this tool demystifies nutritional content, making healthy eating and informed dietary choices more accessible.
function calculateNutrition() {
var servingSize = parseFloat(document.getElementById("servingSize").value);
var caloriesPerServing = parseFloat(document.getElementById("caloriesPerServing").value);
var proteinPerServing = parseFloat(document.getElementById("proteinPerServing").value);
var carbsPerServing = parseFloat(document.getElementById("carbsPerServing").value);
var fatPerServing = parseFloat(document.getElementById("fatPerServing").value);
var fiberPerServing = parseFloat(document.getElementById("fiberPerServing").value);
var sugarPerServing = parseFloat(document.getElementById("sugarPerServing").value);
var desiredQuantity = parseFloat(document.getElementById("desiredQuantity").value);
var resultDiv = document.getElementById("result");
var resultDetailsDiv = document.getElementById("result-details");
// Input validation
if (isNaN(servingSize) || servingSize <= 0 ||
isNaN(caloriesPerServing) || caloriesPerServing < 0 ||
isNaN(proteinPerServing) || proteinPerServing < 0 ||
isNaN(carbsPerServing) || carbsPerServing < 0 ||
isNaN(fatPerServing) || fatPerServing < 0 ||
isNaN(fiberPerServing) || fiberPerServing < 0 ||
isNaN(sugarPerServing) || sugarPerServing < 0 ||
isNaN(desiredQuantity) || desiredQuantity <= 0) {
resultDiv.innerHTML = "Error: Please enter valid positive numbers for all fields.";
resultDetailsDiv.innerHTML = "";
return;
}
var scalingFactor = desiredQuantity; // Since desiredQuantity is in "servings"
var totalCalories = caloriesPerServing * scalingFactor;
var totalProtein = proteinPerServing * scalingFactor;
var totalCarbs = carbsPerServing * scalingFactor;
var totalFat = fatPerServing * scalingFactor;
var totalFiber = fiberPerServing * scalingFactor;
var totalSugar = sugarPerServing * scalingFactor;
// Format the output to one decimal place for nutrients, or whole number for calories
var formattedCalories = totalCalories.toFixed(0);
var formattedProtein = totalProtein.toFixed(1);
var formattedCarbs = totalCarbs.toFixed(1);
var formattedFat = totalFat.toFixed(1);
var formattedFiber = totalFiber.toFixed(1);
var formattedSugar = totalSugar.toFixed(1);
resultDiv.innerHTML =
formattedCalories + " kcal";
resultDetailsDiv.innerHTML =
"
Breakdown for " + desiredQuantity + " servings (approx. " + (servingSize * desiredQuantity).toFixed(1) + "g):" +
"Protein: " + formattedProtein + " g" +
"Carbohydrates: " + formattedCarbs + " g" +
"Fat: " + formattedFat + " g" +
"Fiber: " + formattedFiber + " g" +
"Sugar: " + formattedSugar + " g";
}