.nutrition-calculator-container {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
max-width: 600px;
margin: 20px auto;
padding: 25px;
border: 1px solid #e0e0e0;
border-radius: 10px;
background-color: #f9f9f9;
box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}
.nutrition-calculator-container h2 {
text-align: center;
color: #333;
margin-bottom: 25px;
font-size: 26px;
}
.nutrition-calculator-container .input-group {
margin-bottom: 18px;
}
.nutrition-calculator-container label {
display: block;
margin-bottom: 8px;
color: #555;
font-weight: bold;
font-size: 15px;
}
.nutrition-calculator-container input[type="text"],
.nutrition-calculator-container input[type="number"] {
width: calc(100% – 22px);
padding: 12px;
border: 1px solid #ccc;
border-radius: 6px;
font-size: 16px;
box-sizing: border-box;
transition: border-color 0.3s ease;
}
.nutrition-calculator-container input[type="text"]:focus,
.nutrition-calculator-container input[type="number"]:focus {
border-color: #007bff;
outline: none;
box-shadow: 0 0 5px rgba(0, 123, 255, 0.3);
}
.nutrition-calculator-container button {
display: block;
width: 100%;
padding: 14px 20px;
background-color: #28a745;
color: white;
border: none;
border-radius: 6px;
font-size: 18px;
cursor: pointer;
transition: background-color 0.3s ease, transform 0.2s ease;
margin-top: 25px;
}
.nutrition-calculator-container button:hover {
background-color: #218838;
transform: translateY(-2px);
}
.nutrition-calculator-container .result-section {
margin-top: 30px;
padding: 20px;
background-color: #e9f7ef;
border: 1px solid #d4edda;
border-radius: 8px;
text-align: center;
font-size: 17px;
color: #155724;
}
.nutrition-calculator-container .result-section p {
margin: 8px 0;
line-height: 1.6;
}
.nutrition-calculator-container .result-section strong {
color: #0f3d1a;
}
.nutrition-calculator-container .error-message {
color: #dc3545;
margin-top: 10px;
text-align: center;
font-weight: bold;
}
function calculateNutrition() {
var foodName = document.getElementById("foodName").value;
var quantityGrams = parseFloat(document.getElementById("quantityGrams").value);
var caloriesPer100g = parseFloat(document.getElementById("caloriesPer100g").value);
var proteinPer100g = parseFloat(document.getElementById("proteinPer100g").value);
var carbsPer100g = parseFloat(document.getElementById("carbsPer100g").value);
var fatPer100g = parseFloat(document.getElementById("fatPer100g").value);
var nutritionResultDiv = document.getElementById("nutritionResult");
var errorMessageDiv = document.getElementById("errorMessage");
// Reset previous results and errors
nutritionResultDiv.style.display = "none";
errorMessageDiv.style.display = "none";
errorMessageDiv.innerHTML = "";
if (isNaN(quantityGrams) || quantityGrams <= 0 ||
isNaN(caloriesPer100g) || caloriesPer100g < 0 ||
isNaN(proteinPer100g) || proteinPer100g < 0 ||
isNaN(carbsPer100g) || carbsPer100g < 0 ||
isNaN(fatPer100g) || fatPer100g < 0) {
errorMessageDiv.innerHTML = "Please enter valid positive numbers for all nutritional values and quantity.";
errorMessageDiv.style.display = "block";
return;
}
var factor = quantityGrams / 100;
var totalCalories = (caloriesPer100g * factor).toFixed(1);
var totalProtein = (proteinPer100g * factor).toFixed(1);
var totalCarbs = (carbsPer100g * factor).toFixed(1);
var totalFat = (fatPer100g * factor).toFixed(1);
document.getElementById("displayFoodName").innerText = foodName ? foodName : "Food Item";
document.getElementById("displayQuantity").innerText = quantityGrams;
document.getElementById("totalCalories").innerText = totalCalories;
document.getElementById("totalProtein").innerText = totalProtein;
document.getElementById("totalCarbs").innerText = totalCarbs;
document.getElementById("totalFat").innerText = totalFat;
nutritionResultDiv.style.display = "block";
}
Food Nutrition Calculator
Nutrition Summary
For (g):
Total Calories: kcal
Total Protein: g
Total Carbohydrates: g
Total Fat: g
Understanding Your Food: A Guide to Nutrition Calculation
In today's health-conscious world, understanding what you eat is more important than ever. Whether you're tracking macros for fitness, managing dietary restrictions, or simply aiming for a balanced diet, knowing the nutritional breakdown of your food is a powerful tool. Our Food Nutrition Calculator helps you quickly determine the calorie, protein, carbohydrate, and fat content of any food item based on its per-100g values and the quantity you consume.
Why Track Nutrition?
Tracking your nutrition, often referred to as macro tracking (macronutrients: protein, carbohydrates, and fats), offers several benefits:
- Weight Management: By knowing your calorie intake, you can better manage weight loss, gain, or maintenance goals.
- Muscle Growth & Repair: Adequate protein intake is crucial for muscle synthesis, especially for athletes and those engaged in strength training.
- Energy Levels: Carbohydrates are your body's primary energy source. Tracking them helps ensure you have enough fuel for daily activities.
- Overall Health: Understanding your fat intake, particularly the types of fats, contributes to heart health and overall well-being.
- Dietary Goals: Essential for specific diets like ketogenic, low-carb, high-protein, or for managing conditions like diabetes.
How to Use This Calculator
Our calculator is designed for simplicity and accuracy. Here's a step-by-step guide:
- Find Nutritional Information: Look for the nutritional label on your food packaging. Most labels provide values per 100g or per serving. If you're eating fresh produce or unpackaged items, you can find reliable data from online databases like the USDA FoodData Central or by searching for "[Food Item Name] nutrition per 100g".
- Enter Food Item Name (Optional): This field is for your reference, helping you keep track of what you're calculating.
- Input Quantity Consumed (grams): Accurately weigh the portion of food you are eating in grams. This is crucial for precise calculations.
- Enter Per 100g Values: Input the Calories (kcal), Protein (g), Carbohydrates (g), and Fat (g) as listed per 100g on the nutritional label or database.
- Click "Calculate Nutrition": The calculator will instantly display the total calories, protein, carbohydrates, and fat for the exact quantity you entered.
Example Calculation:
Let's say you're eating 150 grams of cooked chicken breast (skinless). You look up its nutritional information and find:
- Calories per 100g: 165 kcal
- Protein per 100g: 31 g
- Carbohydrates per 100g: 0 g
- Fat per 100g: 3.6 g
You would input these values into the calculator along with "150" for Quantity Consumed. The calculator would then show:
- Total Calories: 247.5 kcal
- Total Protein: 46.5 g
- Total Carbohydrates: 0 g
- Total Fat: 5.4 g
This allows you to see the exact contribution of that portion to your daily intake goals.
Important Considerations
- Accuracy is Key: The results are only as accurate as the data you input. Always strive for precise measurements and reliable nutritional sources.
- Cooking Methods: The way food is prepared can affect its nutritional content. For example, frying adds fat and calories compared to baking or steaming.
- Individual Needs: Nutritional requirements vary greatly based on age, sex, activity level, and health goals. This calculator is a tool to help you track, but it does not provide personalized dietary advice.
- Consult a Professional: For specific dietary plans or health concerns, always consult with a registered dietitian or healthcare professional.
Empower yourself with knowledge about your food. Use this calculator to make informed choices and achieve your health and wellness objectives!