Cooking

Food Calorie Calculator

Calculate total calories and macronutrient energy breakdown from food portions.

Reviewed & Maintained by

Aadil Malik — Software Engineer

1 min read · 25 words

What is a Food Calorie Calculator?

A food calorie calculator computes total caloric energy and macronutrient distribution ratios from food portions and nutritional ingredients.

A dietary calorie (kilocalorie) is the amount of thermal energy required to raise the temperature of 1 kilogram of water by 1°C.

Total Calories = (Protein grams * 4) + (Carbohydrate grams * 4) + (Fat grams * 9) + (Alcohol grams * 7).

Weight is governed by thermodynamics: Calories In vs. Calories Out (CICO).

TEF is the energy expended digesting food: Protein burns ~20%–30% of its calories during digestion; carbs burn ~5%–10%; fats burn ~0%–3%.

Approximately 3,500 dietary calories.

Foods high in energy/sugar with little or no essential micronutrients, vitamins, minerals, or fiber.

Studies show menu calorie counts can vary by ±10%–20% due to portion variance.

Non-Exercise Activity Thermogenesis (NEAT) includes walking, fidgeting, posture, and chores.