Calorie Calculator

Calorie Calculator is a web-based tool that estimates maintenance and net calories by combining BMR, TDEE, and TEF calculations. It addresses the need for transparent estimates of daily energy requirements that can incorporate data from fitness trackers or dietary macronutrient details.

Users enter sex, age, height, weight, and an optional body-fat percentage. The calculator applies the Mifflin-St Jeor equation by default and switches to the Katch-McArdle formula when body-fat data is supplied. For physical activity it offers two modes: selection from predefined PAL multipliers tied to step-count ranges and activity descriptions, or direct entry of calories burned through exercise and non-exercise movement as recorded by devices such as Apple Watch, Fitbit, Garmin, or MyFitnessPal. When manual activity calories are used, TEF can be modeled either as a fixed percentage or as a macro-weighted value derived from protein, carbohydrate, and fat intake. The resulting figures supply a net calorie target suitable for tracking applications including MyFitnessPal or Lose It, along with guidance on maintenance, deficit, and surplus levels.

References are provided for each component: Mifflin-St Jeor and related BMR studies, sources on PAL and NEAT concepts, reviews of diet-induced thermogenesis, and notes on the limitations of the 3500 kcal per pound rule of thumb. A separate weight-loss guide is linked for practical application. The site states that the calculator is intended for educational purposes only and does not offer medical advice, diagnosis, or treatment.

It is delivered as a free online application that requires no installation or account. No pricing, licensing, or developer details are listed.