Food Calorie Lookup Calculator

Every food item contains a mix of three macronutrients, each contributing a fixed number of calories per gram.

The calorie formula: Total Calories = (Protein × 4) + (Carbohydrates × 4) + (Fat × 9)

Where protein, carbohydrates, and fat are measured in grams.

Macronutrient calorie values:

• Protein: 4 kcal per gram
• Carbohydrates: 4 kcal per gram
• Fat: 9 kcal per gram
• Alcohol: 7 kcal per gram (not a macronutrient but still contributes)
• Dietary fiber: often listed under carbs but contributes ~2 kcal/g since it is not fully digested

Worked example: A 100 g chicken breast contains approximately:

• Protein: 31 g → 31 × 4 = 124 kcal
• Carbohydrates: 0 g → 0 kcal
• Fat: 3.6 g → 3.6 × 9 = 32 kcal
• Total: ~156 kcal

Common reference values (per 100 g):

• White rice (cooked): 130 kcal
• Whole egg: 155 kcal
• Cheddar cheese: 403 kcal
• Olive oil: 884 kcal
• Apple: 52 kcal
• Broccoli: 34 kcal

Why the arithmetic rarely lands exactly on the label

Multiply out the macros on almost any nutrition label and you will get a number a few percent off the stated calories. Two reasons, and neither is an error.

Fiber is the bigger one. It sits in the carbohydrate column but is not fully digested, so it delivers roughly 2 kcal per gram rather than 4. A banana carries about 3 g of fiber, which is why 27 g of carbohydrate does not come to the printed 105 kcal. The other reason is plain rounding: manufacturers round grams to the nearest whole number and calories to the nearest 5 or 10, and those roundings compound.

This calculator shows both figures when they disagree, so you can see the gap rather than wonder about it.

Calorie density

Fat is where the calories hide. A tablespoon of olive oil is 14 g and 119 kcal, roughly the same as a whole banana, and it disappears into a pan without anyone noticing. Water is the opposite: a cup of raw spinach is 7 kcal because it is almost entirely water. That contrast is the whole basis of volume eating, and it is more useful than any single number on this page.

A note on the food list

The 59 foods here are standard reference values per common serving. Real portions vary enormously, and restaurant servings in particular tend to run well above the figures used for a home-cooked equivalent. Weigh your food if the number matters to you. Cooking changes weight as water leaves, but not calories, so weighing raw and looking up the raw figure is the most reliable route.