One shared unit
Kilocalories make the energy in different foods comparable.
Understanding Calories
What energy values mean, how kilocalories are calculated and how to compare foods consistently.
Educational guide · Reviewed 26 July 2026What is a calorie?
Calories measure energy. The body uses that energy for basic functions, movement, growth, repair and keeping warm.
Understanding Calories
Food source · amount · everyday role
What it does for the body.
Macronutrients add up
Fat provides about 9 kcal per gram; protein and carbohydrate provide about 4 kcal per gram.
Needs differ
Energy needs change with body size, age, activity, growth and pregnancy.
When to pay particular attention
Needs are not identical.
Age, life stage, activity and the rest of the diet can change what deserves attention.
- Athletes and highly active people
- People with changing appetite or body weight
- Anyone comparing portion sizes
Food first.
Protein, carbohydrate, fat and alcohol provide energy. Vitamins, minerals and water do not provide calories.
How do we measure it?
One value. Three useful views.
Per 100 g
A standard basis for comparing different foods and pack sizes.
Per serving
The quantity associated with a stated serving. Serving sizes can differ.
Per package
The calculated total when the entire package is the relevant amount.
We show where every number comes from.
Diplomats Product Nutrition
The value belongs to the exact product, recipe and measurement basis shown. We present it as the product’s number.
Reference Nutrition Data
A scientific food database provides a range for a comparable fish. We mark it with an asterisk and never present it as a laboratory result for the product.
Nutrition Knowledge
Primary health and food-science sources explain what a nutrient does, who should pay attention and how the number is used.
What is a calorie?
Calories measure energy. The body uses that energy for basic functions, movement, growth, repair and keeping warm.
Why does understanding calories matter?
One shared unit: Kilocalories make the energy in different foods comparable. Macronutrients add up: Fat provides about 9 kcal per gram; protein and carbohydrate provide about 4 kcal per gram. Needs differ: Energy needs change with body size, age, activity, growth and pregnancy.
Can a value be assumed from the fish species?
No. Diplomats separates general food education from facts verified for a particular recipe, serving and product.
What does “per 100 g” mean?
It is a standard comparison basis. It lets visitors compare products of different pack and serving sizes using the same amount of food.
How are products recommended?
The Product Finder combines product nutrition, flavour, format and the preferences you select to find the closest match.
Primary health and food-safety sources used to review this guide.
Apply the knowledge.
Compare product nutrition on the same per 100 g basis and choose what suits your meal.
Compare product nutritionPut it on the table.
Explore serving ideas and practical meal contexts connected to Diplomats products.
Explore recipesSee the knowledge in practice.
Ready to apply what you have learned?
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