A calorie burn calculator estimates how many calories you expend during physical activity. It uses your body weight, the type of activity, and duration to calculate energy expenditure — expressed in kilocalories (kcal), commonly referred to as "calories" in everyday usage.

Calorie burn during exercise is calculated using MET values (Metabolic Equivalent of Task). MET is a ratio of your working metabolic rate relative to your resting metabolic rate. Walking has a MET of around 3.5, while vigorous cricket batting can reach 6–7. The formula is: Calories = MET × Weight (kg) × Duration (hours).

These estimates are approximations. Actual calorie burn varies significantly based on individual fitness level, body composition, ambient temperature, and exercise intensity. Use this as a guide for tracking relative effort, not as a precise measurement.