Create a recipe calorie calculator

Here’s a simple recipe calorie calculator script in Python that you can use or adapt for your website. It calculates total calories of a recipe based on ingredients and their amounts.

python
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# Recipe Calorie Calculator

# Sample calorie database (per 100 grams)
calorie_database = {
    'chicken breast': 165,
    'olive oil': 884,
    'rice': 130,
    'onion': 40,
    'carrot': 41,
    'potato': 77,
    'butter': 717,
    'sugar': 387,
    'egg': 155,
    'milk': 42,
    'flour': 364,
    'cheese': 402,
    'tomato': 18,
    'garlic': 149,
    'spinach': 23,
}

def calculate_recipe_calories(ingredients):
    """
    ingredients: list of tuples [(ingredient_name, weight_in_grams), ...]
    returns total calories of the recipe
    """
    total_calories = 0
    missing_ingredients = []

    for ingredient, weight in ingredients:
        ingredient_lower = ingredient.lower()
        if ingredient_lower in calorie_database:
            cal_per_100g = calorie_database[ingredient_lower]
            calories = (cal_per_100g * weight) / 100
            total_calories += calories
        else:
            missing_ingredients.append(ingredient)

    return total_calories, missing_ingredients

# Example usage
ingredients_list = [
    ('Chicken Breast', 200),  # 200g chicken breast
    ('Olive Oil', 20),       # 20g olive oil
    ('Rice', 150),           # 150g rice
    ('Onion', 50),           # 50g onion
]

total_cal, missing = calculate_recipe_calories(ingredients_list)
print(f"Total calories: {total_cal:.2f} kcal")
if missing:
    print(f"Calories for these ingredients are missing: {', '.join(missing)}")

You can extend the calorie_database with more ingredients or link it to a nutrition API or database for accurate values.

If you want, I can help you make a web version (HTML + JavaScript) of this calculator. Would you like that?