Calorie Calculator
Estimate your daily caloric needs based on weight, height, age, gender, and activity level.
Overview
This Calorie Calculator helps fitness enthusiasts, dieters, and anyone monitoring their nutrition to estimate their daily caloric needs. It uses the Mifflin-St Jeor Equation to calculate your Basal Metabolic Rate (BMR) and adjusts it by your activity level.
Calculate Your Daily Caloric Needs
Results:
Daily Calorie Needs: - kcal
Explanation & Methodology
The calculator uses the Mifflin-St Jeor Equation to estimate your Basal Metabolic Rate (BMR). This equation is:
For Men: \( \text{BMR} = (10 \times \text{weight}) + (6.25 \times \text{height}) - (5 \times \text{age}) + 5 \)
For Women: \( \text{BMR} = (10 \times \text{weight}) + (6.25 \times \text{height}) - (5 \times \text{age}) - 161 \)
This BMR is then multiplied by an activity factor (e.g., 1.2 for sedentary, 1.55 for moderate, and 1.725 for active) to estimate your total daily energy expenditure (TDEE), which represents the calories you need to maintain your current weight.
Example Calculation
For a 30-year-old male weighing 70 kg and 175 cm tall with moderate activity:
BMR ≈ (10×70) + (6.25×175) − (5×30) + 5 = 700 + 1094 − 150 + 5 = 1649 kcal
Daily Calorie Needs ≈ 1649 × 1.55 ≈ 2556 kcal
Frequently Asked Questions
What is BMR?
BMR (Basal Metabolic Rate) is the number of calories your body needs to maintain basic physiological functions while at rest.
How is total daily calorie need calculated?
Your BMR is multiplied by an activity factor to estimate your total daily energy expenditure (TDEE), which indicates how many calories you need per day to maintain your current weight.
Can this calculator help with weight loss or gain?
Yes. Knowing your maintenance calories can help you adjust your diet for weight loss or gain. For weight loss, consume fewer calories than your TDEE; for weight gain, consume more.