Meal Calorie Calculator

The calculation starts by estimating your Basal Metabolic Rate (BMR) using the Mifflin-St Jeor equation, which incorporates your weight, height, age, and biological sex. For males, the base formula is (10 × weight in kg) + (6.25 × height in cm) - (5 × age in years) + 5. For females, the formula adjusts the constant to -161. This BMR value is then multiplied by your activity factor to yield your Total Daily Energy Expenditure (TDEE). Once your total daily calories are determined, individual meal targets are calculated using predefined percentage distributions (minimum and maximum ranges) for breakfast, lunch, dinner, and snacks, helping you structure your daily intake effectively.

Imagine a 30-year-old male who weighs 80 kg, stands 180 cm tall (1800 mm), and has a moderate activity factor of 1.55. First, his BMR is calculated: (10 × 80) + (6.25 × 180) - (5 × 30) + 5 = 800 + 1125 - 150 + 5 = 1780 calories. Multiplying this by his activity factor of 1.55 yields a TDEE of 2,759 calories. If his meal plan allocates 25% of his daily calories to breakfast, his target breakfast calories will be 25% of 2,759, resulting in approximately 690 calories for that meal. The calculator uses similar proportional splits to assign ranges for remaining meals and snacks throughout the day.

Consistency is key when tracking meal calories; try to align your largest meals with times of highest physical activity, such as pre- or post-workout windows. Avoid extreme calorie drops between consecutive meals to prevent energy crashes and intense cravings later in the day. Always weigh your foods using a digital kitchen scale rather than relying purely on volumetric cups to ensure your calculated targets match your actual intake.