Daily Calorie Intake Calculator

What is Daily Calorie Intake?

Daily Calorie Intake refers to the total number of calories an individual should consume each day to maintain, lose, or gain weight. This number is based on various factors including age, gender, height, weight, activity level, and weight goals.

The Mifflin-St Jeor Equation for Calorie Calculation

The Mifflin-St Jeor Equation is widely used to estimate Basal Metabolic Rate (BMR), which is then used to calculate Total Daily Energy Expenditure (TDEE):

For men: \[BMR = 10W + 6.25H - 5A + 5\]

For women: \[BMR = 10W + 6.25H - 5A - 161\]

Where:

• \(W\) = weight in kg
• \(H\) = height in cm
• \(A\) = age in years

Step-by-Step Calorie Calculation

1. Calculate BMR using the Mifflin-St Jeor Equation
2. Calculate TDEE: \[TDEE = BMR \times \text{Activity Factor}\]
3. Adjust for weight goal: \[Daily Calories = TDEE + \text{Goal Adjustment}\]

Example Calculation

Let's calculate the daily calorie intake for a 30-year-old man who is 175 cm tall, weighs 70 kg, is moderately active, and wants to maintain his weight:

1. \(BMR = 10 \times 70 + 6.25 \times 175 - 5 \times 30 + 5 = 1690.625 \text{ calories}\)
2. \(TDEE = 1690.625 \times 1.55 \text{ (moderate activity)} = 2620.46875 \text{ calories}\)
3. \(Daily Calories = 2620.46875 + 0 \text{ (maintain weight)} = 2620.46875 \text{ calories}\)

Visual Representation

The blue portion of the bar represents the calculated daily calorie intake (2620 calories) relative to 3000 calories.