Free Recipe Calorie Calculator

Free Recipe Calorie Calculator – Calculate Your Meal's Nutritional Value :root { –primary-color: #004a99; –success-color: #28a745; –background-color: #f8f9fa; –text-color: #333; –border-color: #ddd; –card-background: #fff; –shadow: 0 2px 5px rgba(0,0,0,0.1); } body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background-color: var(–background-color); color: var(–text-color); line-height: 1.6; margin: 0; padding: 0; } .container { max-width: 1000px; margin: 20px auto; padding: 20px; background-color: var(–card-background); border-radius: 8px; box-shadow: var(–shadow); } header { background-color: var(–primary-color); color: white; padding: 20px 0; text-align: center; margin-bottom: 20px; border-radius: 8px 8px 0 0; } header h1 { margin: 0; font-size: 2.5em; } .calculator-section { margin-bottom: 30px; padding: 25px; border: 1px solid var(–border-color); border-radius: 8px; background-color: var(–card-background); } .calculator-section h2 { color: var(–primary-color); 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Free Recipe Calorie Calculator

Accurately estimate the nutritional content of your homemade meals.

Recipe Nutrition Calculator

Enter the name of your recipe.
How many portions does this recipe yield?
Name of the ingredient.
Amount of the ingredient.
Grams (g) Ounces (oz) Milliliters (ml) Cups (cup) Tablespoons (tbsp) Teaspoons (tsp) Piece(s) Unit of measurement for the quantity.
Calories in one unit of the ingredient (e.g., calories per gram).
Protein in grams per unit.
Carbohydrates in grams per unit.
Fat in grams per unit.

What is a Free Recipe Calorie Calculator?

A free recipe calorie calculator is an online tool designed to help individuals estimate the total caloric content and macronutrient breakdown (protein, carbohydrates, and fat) of a homemade recipe. Users input the ingredients, their quantities, and the nutritional information per unit for each component. The calculator then aggregates this data to provide a comprehensive nutritional profile for the entire recipe and, often, a per-serving estimate.

This tool is invaluable for anyone looking to manage their dietary intake, whether for weight management, athletic performance, specific health conditions, or simply to gain a better understanding of the food they consume. It empowers users to make informed choices about their meals by demystifying the nutritional composition of their cooking.

Who Should Use It?

  • Health-Conscious Individuals: Those tracking calories for weight loss, gain, or maintenance.
  • Athletes and Fitness Enthusiasts: People needing to precisely manage macronutrient intake for performance and recovery.
  • Individuals with Dietary Restrictions: Users managing conditions like diabetes (tracking carbs) or high cholesterol (tracking fat).
  • Home Cooks and Food Bloggers: Anyone wanting to provide accurate nutritional information for their recipes.
  • Parents: To understand the nutritional value of meals prepared for children.

Common Misconceptions

  • "It's always perfectly accurate": While these calculators provide excellent estimates, they rely on the accuracy of the data entered and the standard nutritional databases used. Actual nutritional content can vary slightly due to ingredient variations (e.g., fat content in meat), cooking methods, and precise measurements.
  • "It replaces professional advice": For complex medical or dietary needs, consulting a registered dietitian or nutritionist is crucial. This calculator is a tool, not a substitute for expert guidance.
  • "All units are interchangeable": Using consistent units (e.g., grams for solids, ml for liquids) is vital for accurate calculations. The calculator helps manage this, but user input is key.

Recipe Calorie Calculator Formula and Mathematical Explanation

The core of the free recipe calorie calculator lies in a straightforward aggregation and division process. It calculates the total nutritional value of a recipe by summing up the contributions of each individual ingredient and then adjusts these totals based on the number of servings.

Step-by-Step Derivation

  1. Calculate Ingredient Totals: For each ingredient, the total calories, protein, carbohydrates, and fat are determined. This is done by multiplying the quantity of the ingredient used by its corresponding nutritional value per unit.
    • Ingredient Calories = Ingredient Quantity × Calories per Unit
    • Ingredient Protein = Ingredient Quantity × Protein per Unit
    • Ingredient Carbs = Ingredient Quantity × Carbs per Unit
    • Ingredient Fat = Ingredient Quantity × Fat per Unit
  2. Sum All Ingredients: The totals calculated in step 1 for each nutrient (calories, protein, carbs, fat) are summed across all ingredients in the recipe to get the grand total for the entire recipe.
    • Total Recipe Calories = Σ (Ingredient Calories) for all ingredients
    • Total Recipe Protein = Σ (Ingredient Protein) for all ingredients
    • Total Recipe Carbs = Σ (Ingredient Carbs) for all ingredients
    • Total Recipe Fat = Σ (Ingredient Fat) for all ingredients
  3. Calculate Per-Serving Values: The total nutritional values for the recipe are then divided by the total number of servings the recipe yields.
    • Calories per Serving = Total Recipe Calories / Number of Servings
    • Protein per Serving = Total Recipe Protein / Number of Servings
    • Carbs per Serving = Total Recipe Carbs / Number of Servings
    • Fat per Serving = Total Recipe Fat / Number of Servings

Variable Explanations

The calculator uses the following variables:

Variable Meaning Unit Typical Range
Recipe Name The name given to the prepared dish. Text N/A
Number of Servings The total number of equal portions the recipe is divided into. Count 1+
Ingredient Name The name of a specific food item used in the recipe. Text N/A
Quantity The amount of the ingredient used. Grams, Ounces, Milliliters, Cups, etc. 0.1+
Unit The unit of measurement for the ingredient's quantity. Unit Type N/A
Calories per Unit The caloric content of one unit of the ingredient. kcal/Unit 0+
Protein per Unit (g) The protein content in grams for one unit of the ingredient. g/Unit 0+
Carbs per Unit (g) The carbohydrate content in grams for one unit of the ingredient. g/Unit 0+
Fat per Unit (g) The fat content in grams for one unit of the ingredient. g/Unit 0+
Total Recipe Calories Sum of calories from all ingredients. kcal Calculated
Total Recipe Protein Sum of protein from all ingredients. g Calculated
Total Recipe Carbs Sum of carbohydrates from all ingredients. g Calculated
Total Recipe Fat Sum of fat from all ingredients. g Calculated
Calories per Serving Total recipe calories divided by servings. kcal Calculated
Protein per Serving Total recipe protein divided by servings. g Calculated
Carbs per Serving Total recipe carbs divided by servings. g Calculated
Fat per Serving Total recipe fat divided by servings. g Calculated

Practical Examples (Real-World Use Cases)

Here are a couple of examples demonstrating how to use the free recipe calorie calculator:

Example 1: Simple Chicken Salad Sandwich

Recipe: Chicken Salad Sandwich

Servings: 2

Ingredients:

  • Cooked Chicken Breast: 150g (Calories: 1.65/g, Protein: 0.31/g, Carbs: 0/g, Fat: 0.03/g)
  • Mayonnaise: 30g (Calories: 6.5/g, Protein: 0.01/g, Carbs: 0.01/g, Fat: 0.72/g)
  • Celery: 20g (Calories: 0.16/g, Protein: 0.01/g, Carbs: 0.03/g, Fat: 0/g)
  • Bread (2 slices): 60g (Calories: 2.5/g, Protein: 0.09/g, Carbs: 0.47/g, Fat: 0.03/g)

Calculation Process:

  • Chicken: 150g * 1.65 kcal/g = 247.5 kcal; 150g * 0.31g/g = 46.5g P; 150g * 0g/g = 0g C; 150g * 0.03g/g = 4.5g F
  • Mayonnaise: 30g * 6.5 kcal/g = 195 kcal; 30g * 0.01g/g = 0.3g P; 30g * 0.01g/g = 0.3g C; 30g * 0.72g/g = 21.6g F
  • Celery: 20g * 0.16 kcal/g = 3.2 kcal; 20g * 0.01g/g = 0.2g P; 20g * 0.03g/g = 0.6g C; 20g * 0g/g = 0g F
  • Bread: 60g * 2.5 kcal/g = 150 kcal; 60g * 0.09g/g = 5.4g P; 60g * 0.47g/g = 28.2g C; 60g * 0.03g/g = 1.8g F

Total Recipe Nutrition:

  • Total Calories: 247.5 + 195 + 3.2 + 150 = 595.7 kcal
  • Total Protein: 46.5 + 0.3 + 0.2 + 5.4 = 52.4 g
  • Total Carbs: 0 + 0.3 + 0.6 + 28.2 = 29.1 g
  • Total Fat: 4.5 + 21.6 + 0 + 1.8 = 27.9 g

Per Serving Nutrition (divided by 2):

  • Calories per Serving: 595.7 / 2 = 297.85 kcal
  • Protein per Serving: 52.4 / 2 = 26.2 g
  • Carbs per Serving: 29.1 / 2 = 14.55 g
  • Fat per Serving: 27.9 / 2 = 13.95 g

Interpretation: Each sandwich provides approximately 298 calories, with a good balance of protein, moderate carbs, and moderate fat, largely influenced by the mayonnaise and bread.

Example 2: Lentil Soup

Recipe: Hearty Lentil Soup

Servings: 6

Ingredients:

  • Dried Lentils: 2 cups (approx. 350g) (Calories: 3.43/g, Protein: 0.24/g, Carbs: 0.63/g, Fat: 0.01/g)
  • Vegetable Broth: 8 cups (approx. 1920ml) (Calories: 5/cup, Protein: 0.5/cup, Carbs: 1/cup, Fat: 0/cup)
  • Carrots: 2 medium (approx. 120g) (Calories: 0.41/g, Protein: 0.01/g, Carbs: 0.1/g, Fat: 0/g)
  • Onion: 1 medium (approx. 110g) (Calories: 0.4/g, Protein: 0.01/g, Carbs: 0.09/g, Fat: 0/g)
  • Olive Oil: 2 tbsp (approx. 30ml) (Calories: 120/tbsp, Protein: 0/tbsp, Carbs: 0/tbsp, Fat: 14/tbsp)

Calculation Process:

  • Lentils: 350g * 3.43 kcal/g = 1200.5 kcal; 350g * 0.24g/g = 84g P; 350g * 0.63g/g = 220.5g C; 350g * 0.01g/g = 3.5g F
  • Broth: 8 cups * 5 kcal/cup = 40 kcal; 8 cups * 0.5g/cup = 4g P; 8 cups * 1g/cup = 8g C; 8 cups * 0g/cup = 0g F
  • Carrots: 120g * 0.41 kcal/g = 49.2 kcal; 120g * 0.01g/g = 1.2g P; 120g * 0.1g/g = 12g C; 120g * 0g/g = 0g F
  • Onion: 110g * 0.4 kcal/g = 44 kcal; 110g * 0.01g/g = 1.1g P; 110g * 0.09g/g = 9.9g C; 110g * 0g/g = 0g F
  • Olive Oil: 2 tbsp * 120 kcal/tbsp = 240 kcal; 2 tbsp * 0g/tbsp = 0g P; 2 tbsp * 0g/tbsp = 0g C; 2 tbsp * 14g/tbsp = 28g F

Total Recipe Nutrition:

  • Total Calories: 1200.5 + 40 + 49.2 + 44 + 240 = 1573.7 kcal
  • Total Protein: 84 + 4 + 1.2 + 1.1 + 0 = 90.3 g
  • Total Carbs: 220.5 + 8 + 12 + 9.9 + 0 = 250.4 g
  • Total Fat: 3.5 + 0 + 0 + 0 + 28 = 31.5 g

Per Serving Nutrition (divided by 6):

  • Calories per Serving: 1573.7 / 6 = 262.28 kcal
  • Protein per Serving: 90.3 / 6 = 15.05 g
  • Carbs per Serving: 250.4 / 6 = 41.73 g
  • Fat per Serving: 31.5 / 6 = 5.25 g

Interpretation: This lentil soup is a nutrient-dense meal, providing a substantial amount of protein and fiber (from lentils and vegetables) with moderate carbohydrates and relatively low fat, making it a healthy and filling option.

How to Use This Free Recipe Calorie Calculator

Using the free recipe calorie calculator is simple and intuitive. Follow these steps to get an accurate nutritional breakdown of your recipes:

  1. Enter Recipe Name and Servings: Start by giving your recipe a name and specifying the total number of servings it yields. This is crucial for calculating per-serving nutrition.
  2. Add Ingredients One by One: For each ingredient in your recipe:
    • Type the ingredient's name.
    • Enter the exact quantity you used.
    • Select the correct unit of measurement from the dropdown.
    • Find and input the nutritional information (calories, protein, carbs, fat) per unit for that ingredient. You can often find this information on food packaging, online nutritional databases (like the USDA FoodData Central), or by using standard values for common ingredients.
  3. Click "Add Ingredient": After entering the details for an ingredient, click the "Add Ingredient" button. The calculator will process this ingredient and update the running totals. Repeat this step for all ingredients.
  4. Review the Results: Once all ingredients are added, the calculator will display:
    • Total Recipe Calories: The overall caloric content of the entire recipe.
    • Total Macronutrients: The total grams of protein, carbohydrates, and fat for the whole recipe.
    • Per Serving Breakdown: The estimated calories and macronutrients for a single serving.
    • Ingredient Table: A detailed list of each ingredient added, its quantity, and its nutritional contribution.
    • Chart: A visual representation of the macronutrient distribution per serving.
  5. Use the "Copy Results" Button: If you want to save or share the nutritional information, click "Copy Results". This will copy the main result, intermediate values, and key assumptions to your clipboard.
  6. Use the "Reset" Button: If you need to start over or clear the current recipe data, click the "Reset" button.

How to Read Results

The results provide a clear picture of your recipe's nutritional profile. The primary result shows the total calories per serving. The intermediate values give you the grams of protein, carbohydrates, and fat per serving, which are essential for understanding the macronutrient balance. The table offers a granular view, and the chart visually summarizes the macronutrient ratios.

Decision-Making Guidance

Use these results to:

  • Adjust Portions: If a serving is higher in calories than desired, consider increasing the number of servings or reducing ingredient quantities.
  • Modify Ingredients: Swap high-fat ingredients for leaner options or reduce sugar/carb-heavy components to meet specific dietary goals.
  • Plan Meals: Integrate the recipe's nutritional information into your daily intake tracking for better overall diet management.
  • Ensure Balance: Check if the macronutrient ratios align with your fitness or health objectives (e.g., higher protein for muscle building).

Key Factors That Affect Recipe Calorie Calculator Results

While the free recipe calorie calculator provides estimates, several factors can influence the accuracy of the results:

  1. Accuracy of Input Data: The most significant factor. If the nutritional values entered for ingredients (calories, protein, carbs, fat per unit) are incorrect or based on generic data that doesn't match your specific product, the final calculation will be skewed. Always strive for the most precise data available.
  2. Measurement Precision: How accurately you measure ingredients matters. Using a kitchen scale for grams or milliliters is generally more precise than using volume measurements like cups or spoons, especially for dense or irregularly shaped items.
  3. Ingredient Variations: Nutritional content can vary even within the same food type. For example, the fat content of chicken breast can differ slightly, and the sugar content of fruits can vary based on ripeness and variety. Using average values is common, but actual content might differ.
  4. Cooking Methods: How a recipe is cooked can alter its nutritional profile. Frying adds fat, boiling can lead to nutrient loss in the cooking water (though often minimal for calories), and roasting can cause some moisture and fat to render out. The calculator typically assumes raw or standard cooked values unless specified.
  5. "Hidden" Ingredients: Don't forget small additions like cooking oils, butter used for greasing pans, sauces, dressings, or garnishes. These can add significant calories and macronutrients if omitted from the calculation.
  6. Serving Size Consistency: Ensuring that each serving is truly equal is vital. If one serving has significantly more ingredients than another, the per-serving calculation becomes less accurate for the larger portions.
  7. Database Specificity: The calculator relies on nutritional databases. The quality and specificity of these databases impact accuracy. Generic entries might not reflect specialized or branded products accurately.
  8. Water Content Changes: During cooking, water evaporates, concentrating nutrients in the remaining mass. If you weigh ingredients raw and calculate based on cooked weight, or vice versa, without accounting for this, results can be off. It's best to use consistent units and data (e.g., raw data for raw ingredients).

Frequently Asked Questions (FAQ)

Q1: How accurate is a free recipe calorie calculator?

A: It provides a very good estimate, but accuracy depends heavily on the precision of the data you input. Using exact measurements and reliable nutritional information for each ingredient yields the best results. It's not a laboratory analysis but a practical tool for dietary planning.

Q2: Can I use this calculator for baking recipes?

A: Yes, absolutely. Baking recipes involve precise measurements of ingredients, making them ideal for this calculator. Just ensure you input all components, including flour, sugar, butter, eggs, etc., with their correct nutritional values.

Q3: What if I can't find the exact nutritional info for an ingredient?

A: Use the closest available match from a reputable source (like a government food database or the product's packaging if available). For common items like basic vegetables or fruits, standard values are usually sufficient. For processed foods, try to find data for the specific brand or a very similar product.

Q4: Does the calculator account for calories burned during cooking?

A: No, the calculator estimates the caloric content of the ingredients used. It does not account for energy expended during the cooking process itself.

Q5: How do I handle ingredients measured in volume (like cups) versus weight (like grams)?

A: The calculator allows you to select units. For best accuracy, especially with ingredients like flour or liquids, using weight (grams/ml) is often preferred. If you must use volume, ensure the "per unit" nutritional data corresponds to that volume measurement (e.g., calories per cup).

Q6: What are macronutrients?

A: Macronutrients are the nutrients your body needs in large amounts: protein, carbohydrates, and fats. They provide energy (calories) and are essential for bodily functions. Fiber is often considered alongside carbohydrates.

Q7: Can this calculator help me lose weight?

A: It can be a valuable tool. By understanding the calorie content of your homemade meals, you can better manage your overall daily intake to achieve a calorie deficit necessary for weight loss. It helps you make more informed food choices.

Q8: Should I include water in my calculations?

A: Pure water contains zero calories and negligible macronutrients. It's generally not necessary to include water in the calculation unless it's part of a pre-made beverage like broth or juice.

Q9: What if my recipe includes spices or herbs?

A: Spices and herbs are typically used in very small quantities and have negligible caloric or macronutrient impact. You can usually omit them from the calculation unless you are using them in unusually large amounts.

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var carbsPerServing = totalRecipeCarbs / servings; var fatPerServing = totalRecipeFat / servings; document.getElementById('totalCalories').textContent = totalRecipeCalories.toFixed(1) + ' kcal'; document.getElementById('totalProtein').textContent = totalRecipeProtein.toFixed(1); document.getElementById('totalCarbs').textContent = totalRecipeCarbs.toFixed(1); document.getElementById('totalFat').textContent = totalRecipeFat.toFixed(1); document.getElementById('caloriesPerServing').textContent = caloriesPerServing.toFixed(1); document.getElementById('proteinPerServing').textContent = proteinPerServing.toFixed(1); document.getElementById('carbsPerServing').textContent = carbsPerServing.toFixed(1); document.getElementById('fatPerServing').textContent = fatPerServing.toFixed(1); updateTable(); updateChart(proteinPerServing, carbsPerServing, fatPerServing); } function updateTable() { var tableBody = document.querySelector('#ingredientTable tbody'); tableBody.innerHTML = ''; // Clear existing rows for (var i = 0; i < ingredients.length; i++) { var row = tableBody.insertRow(); row.insertCell(0).textContent = ingredients[i].name; row.insertCell(1).textContent = ingredients[i].quantity.toFixed(1); row.insertCell(2).textContent = ingredients[i].unit; row.insertCell(3).textContent = ingredients[i].calories.toFixed(1) + ' kcal'; row.insertCell(4).textContent = ingredients[i].protein.toFixed(1) + ' g'; row.insertCell(5).textContent = ingredients[i].carbs.toFixed(1) + ' g'; row.insertCell(6).textContent = ingredients[i].fat.toFixed(1) + ' g'; } } function updateChart(protein, carbs, fat) { var ctx = document.getElementById('nutritionChart').getContext('2d'); if (chartInstance) { chartInstance.destroy(); } chartInstance = new Chart(ctx, { type: 'bar', data: { labels: ['Protein', 'Carbohydrates', 'Fat'], datasets: [{ label: 'Grams per Serving', data: [protein, carbs, fat], backgroundColor: [ 'rgba(54, 162, 235, 0.6)', // Blue for Protein 'rgba(255, 206, 86, 0.6)', // Yellow for Carbs 'rgba(255, 99, 132, 0.6)' // Red for Fat ], borderColor: [ 'rgba(54, 162, 235, 1)', 'rgba(255, 206, 86, 1)', 'rgba(255, 99, 132, 1)' ], borderWidth: 1 }] }, options: { responsive: true, maintainAspectRatio: false, scales: { y: { beginAtZero: true, title: { display: true, text: 'Grams' } } }, plugins: { legend: { display: false // Hide legend as labels are clear }, title: { display: true, text: 'Macronutrient Distribution Per Serving' } } } }); } function clearIngredientForm() { document.getElementById('ingredientName').value = ''; document.getElementById('quantity').value = ''; document.getElementById('unit').value = 'g'; document.getElementById('caloriesPerUnit').value = ''; document.getElementById('proteinPerUnit').value = ''; document.getElementById('carbsPerUnit').value = ''; document.getElementById('fatPerUnit').value = ''; // Clear error messages document.getElementById('ingredientNameError').style.display = 'none'; document.getElementById('quantityError').style.display = 'none'; document.getElementById('caloriesPerUnitError').style.display = 'none'; document.getElementById('proteinPerUnitError').style.display = 'none'; document.getElementById('carbsPerUnitError').style.display = 'none'; document.getElementById('fatPerUnitError').style.display = 'none'; document.getElementById('servingsError').style.display = 'none'; // Reset input borders document.getElementById('ingredientName').style.borderColor = '#ddd'; document.getElementById('quantity').style.borderColor = '#ddd'; document.getElementById('caloriesPerUnit').style.borderColor = '#ddd'; document.getElementById('proteinPerUnit').style.borderColor = '#ddd'; document.getElementById('carbsPerUnit').style.borderColor = '#ddd'; document.getElementById('fatPerUnit').style.borderColor = '#ddd'; document.getElementById('servings').style.borderColor = '#ddd'; } function resetCalculator() { ingredients = []; document.getElementById('recipeName').value = 'Example Meal'; document.getElementById('servings').value = '4'; clearIngredientForm(); document.getElementById('results').classList.add('hidden'); document.querySelector('#ingredientTable tbody').innerHTML = ''; if (chartInstance) { chartInstance.destroy(); chartInstance = null; } // Reset chart canvas var canvas = document.getElementById('nutritionChart'); var context = canvas.getContext('2d'); context.clearRect(0, 0, canvas.width, canvas.height); } function copyResults() { var recipeName = document.getElementById('recipeName').value || 'Untitled Recipe'; var servings = document.getElementById('servings').value; var totalCalories = document.getElementById('totalCalories').textContent; var totalProtein = document.getElementById('totalProtein').textContent; var totalCarbs = document.getElementById('totalCarbs').textContent; var totalFat = document.getElementById('totalFat').textContent; var caloriesPerServing = document.getElementById('caloriesPerServing').textContent; var proteinPerServing = document.getElementById('proteinPerServing').textContent; var carbsPerServing = document.getElementById('carbsPerServing').textContent; var fatPerServing = document.getElementById('fatPerServing').textContent; var copyText = "Recipe Nutrition Summary for: " + recipeName + "\n\n"; copyText += "Total Recipe Nutrition:\n"; copyText += "- Calories: " + totalCalories + "\n"; copyText += "- Protein: " + totalProtein + "g\n"; copyText += "- Carbohydrates: " + totalCarbs + "g\n"; copyText += "- Fat: " + totalFat + "g\n\n"; copyText += "Per Serving Nutrition (" + servings + " servings):\n"; copyText += "- Calories: " + caloriesPerServing + "\n"; copyText += "- Protein: " + proteinPerServing + "g\n"; copyText += "- Carbohydrates: " + carbsPerServing + "g\n"; copyText += "- Fat: " + fatPerServing + "g\n\n"; copyText += "Key Assumptions:\n"; copyText += "- Calculations based on user-inputted ingredient data.\n"; copyText += "- Nutritional values are estimates.\n\n"; copyText += "Ingredient Breakdown:\n"; var tableBody = document.querySelector('#ingredientTable tbody'); var rows = tableBody.rows; for (var i = 0; i < rows.length; i++) { copyText += rows[i].cells[0].textContent + ": " + rows[i].cells[1].textContent + " " + rows[i].cells[2].textContent + " | " + rows[i].cells[3].textContent + " | " + rows[i].cells[4].textContent + " | " + rows[i].cells[5].textContent + " | " + rows[i].cells[6].textContent + "\n"; } navigator.clipboard.writeText(copyText).then(function() { // Optional: Provide user feedback var btn = document.querySelector('.btn-copy'); btn.textContent = 'Copied!'; setTimeout(function() { btn.textContent = 'Copy Results'; }, 2000); }).catch(function(err) { console.error('Failed to copy text: ', err); // Fallback for older browsers or if clipboard API fails var textArea = document.createElement("textarea"); textArea.value = copyText; textArea.style.position = "fixed"; textArea.style.left = "-9999px"; document.body.appendChild(textArea); textArea.focus(); textArea.select(); try { document.execCommand('copy'); var btn = document.querySelector('.btn-copy'); btn.textContent = 'Copied!'; setTimeout(function() { btn.textContent = 'Copy Results'; }, 2000); } catch (err) { console.error('Fallback copy failed: ', err); alert("Could not copy text. Please manually select and copy."); } document.body.removeChild(textArea); }); } // Initial setup for chart canvas size window.addEventListener('load', function() { var canvas = document.getElementById('nutritionChart'); canvas.width = canvas.offsetWidth; // Set width based on container canvas.height = 300; // Fixed height for the chart updateResults(); // Calculate initial results if defaults are set }); // Re-calculate chart size on window resize window.addEventListener('resize', function() { var canvas = document.getElementById('nutritionChart'); if (canvas) { canvas.width = canvas.offsetWidth; // Adjust width dynamically // Height can remain fixed or be adjusted based on design needs // canvas.height = 300; if (chartInstance) { chartInstance.resize(); // Inform chart instance about resize } } });

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