What is Calorie Calculator

Our free Calorie Calculator tool will help you estimate the number of calories you need to consume each day to maintain your current weight, based on factors like your age, gender, height, weight, and activity level. And will also categorise results based upon your activity level

How is it Calculated?

The total number of calories a person needs each day varies depending on a number of factors, including the person’s age, sex, height, weight, and level of physical activity. The calorie intake estimation is calculated using the Mifflin-St Jeor equations, considered to be the most accurate by many health and fitness professionals.

Mifflin-St Jeor Equation:

• Men: BMR = 10 * weight(kg) + 6.25 * height(cm) - 5 * age(y) + 5
• Women: BMR = 10 * weight(kg) + 6.25 * height(cm) - 5 * age(y) - 161

The result of BMR is then multiplied by an activity factor to calculate the daily calorie needs:

• Sedentary (little to no exercise): BMR * 1.2
• Lightly active (exercise 1-3 days/week): BMR * 1.375
• Moderately active (exercise 6-7 days/week): BMR * 1.55
• Very active (hard exercise every day): BMR * 1.725
• Extra active (very hard exercise or physical job): BMR * 1.9

There are two more equations commonly used to estimate daily calorie needs.

Harris-Benedict Equation:

• Men: BMR = 88.362 + (13.397 * weight in kg) + (4.799 * height in cm) - (5.677 * age in years)
• Women: BMR = 447.593 + (9.247 * weight in kg) + (3.098 * height in cm) - (4.330 * age in years)

Katch-McArdle Equation:

And the Katch-McArdle Formula can be more accurate for people who are leaner and have more muscle mass:

BMR = 370 + (21.6 * Lean Body Mass(kg) )

And here is formula to calculate Lean Body Mass = (Weight(kg) * (1 - (Body Fat % / 100)))