Calorie Calculator

The Calorie Calculator is used to estimate the number of calories you need daily to maintain, lose, or gain weight. It uses your age, gender, weight, height, and activity level to calculate your daily energy expenditure. This free MathCalc calculator makes it simple and easy to use.

Calorie Calculator

Calculate daily calorie needs (BMR)

How to Use
  1. Fill in the Required Values
  2. Click "Calculate" Button
  3. View Step-By-Step Solution

What is a Calorie?

A Calorie is a unit of energy. In nutrition, it measures the energy you get from the food and drinks you consume.

A step-by-step guide on how to use the MathCalc Calorie Calculator

Step by step:

  • Choose your gender from male or female.
  • Enter your age in the given box.
  • Enter weight (kg) in the given 3rd box.
  • Enter your height(cm) in the 4th box.
  • Choose an activity level from sedentary (little/no exercise),
    light (light exercise for 1-3 days/week),
    moderate (moderate exercise 3-5 days/week),
    active (hard exercise 6-7 days/week),
    or very active (most hard exercise, physical job).
  • After entering the values, click on calculate, and in seconds, you will see the result.

Example 1: If we choose sedentary (little/no exercise)

Choose male from the gender, enter 25 in the age(years) box, 70 in the weight (kg) box, and 175 in the height(cm) box.

Step by step:

  • Calculating daily calorie needs
  • Using the Mifflin-St. Jeor equation
  • BMR (male) = (10 × weight) + (6.25 × height) - (5 × age) + 5
  • BMR = (10 × 70) + (6.25 × 175) - (5 × 25) + 5
  • BMR = 1673.75 calories/day
  • TDEE = BMR × Activity level = 1673.75 × 1.2 = 2008.5

result:

  • Bmr: 1674 calories/day
  • Tdee: 2009 calories/day

Example 2: If we choose light (light exercise 1-3 days/ week)

Choose female from the gender, enter 28 in the age(years) box, 55 in the weight(kg) box, or 160 in the height(cm) box.

Step by step:

  • Calculating daily calorie needs
  • Using the Mifflin-St. Jeor equation
  • BMR (female) = (10 × weight) + (6.25 × height) - (5 × age) - 161
  • BMR = (10 × 55) + (6.25 × 160) - (5 × 28) + -161
  • BMR = 1249 calories/day
  • TDEE = BMR × Activity level = 1249 × 1.375 = 1717.375

result:

  • Bmr: 1249 calories/day
  • Tdee: 1717 calories/day

Example 3: If we choose Moderate (moderate exercise 3-5 days/week)

Choose male from the gender, enter 35 in the age (years) box, 80 in the weight(kg) box, and 180 in the height(cm) box.

Step by step:

  • Calculating daily calorie needs
  • Using the Mifflin-St. Jeor equation
  • BMR (male) = (10 × weight) + (6.25 × height) - (5 × age) + 5
  • BMR = (10 × 80) + (6.25 × 180) - (5 × 35) + 5
  • BMR = 1755 calories/day
  • TDEE = BMR × Activity level = 1755 × 1.55 = 2720.25

result:

  • Bmr: 1755 calories/day
  • Tdee: 2720 calories/day

Example 4: If we choose active (hard exercise6-7 days/week)

Choose female from the gender, enter 30 in the age(years) box, 60 in the weight(kg) box, and 165 in the height(cm) box.

Step by step:

  • Calculating daily calorie needs
  • Using the Mifflin-St. Jeor equation
  • BMR (female) = (10 × weight) + (6.25 × height) - (5 × age) - 161
  • BMR = (10 × 60) + (6.25 × 165) - (5 × 30) + -161
  • BMR = 1320.25 calories/day
  • TDEE = BMR × Activity level = 1320.25 × 1.725 = 2277.43125

result:

  • Bmr: 1320 calories/day
  • Tdee: 2277 calories/day

Example 5: If we choose very active (very hard exercise, physical job)

Choose male from the gender, enter 40 in the age(years) box, 85 in the weight(kg) box, and 178 in the height(cm) box.

Step by step:

  • Calculating daily calorie needs
  • Using the Mifflin-St. Jeor equation
  • BMR (male) = (10 × weight) + (6.25 × height) - (5 × age) + 5
  • BMR = (10 × 85) + (6.25 × 178) - (5 × 40) + 5
  • BMR = 1767.5 calories/day
  • TDEE = BMR × Activity level = 1767.5 × 1.9 = 3358.25

result:

  • Bmr: 1768 calories/day
  • Tdee: 3358 calories/day

Why use the MathCalc calorie calculator?

Get quick results:

If you want to find your calorie intake, enter your height, weight, age, and choose an activity level, and in seconds, the calculator gives you accurate results.

  • If a male(age(years): 40, weight(kg): 85, height(cm): 178) wants to find the BMR or TDEE, enter the required inputs, and the calculator gives an accurate result (BMR: 1767.5 calories/ day, TDEE: 3358.25) in seconds.

Reduce human error:

Manual calorie calculation can be confusing. This tool provides proven formulas to reduce errors, and your results are always right.

  • If a female (age: 30 years, weight: 60 kg, and height: 165 cm) wants to calculate the BMR or TDEE, enter the required input, and the calculator gives you an accurate result (BMR: 1320.25 calories/day, TDEE: 2277.43125) in seconds.

User-friendly:

This MathCalc Calorie Calculator has a simple and clear interface. Anyone can use it easily. Manual calculations are complex, but this calculator provides you with proven formulas.

  • Choose the right activity level to match your lifestyle.
  • For weight loss, consume fewer calories than your daily intake.
  • Always enter accurate values for height, weight, and age.

FAQs

What is Basal Metabolic Rate (BMR)?

Your basal metabolic rate is the number of calories your body needs to do important things like breathing and digesting food while you are at rest.

What is Total Daily Energy Expenditure (TDEE)?

TDEE (Total Daily Energy Expenditure) is your BMR multiplied by your activity level. It represents the calories you burn in a day.

What is BMI and why is it important?

BMI (Body Mass Index) is a numerical value derived from your height and weight. It helps determine whether you are underweight, normal weight, overweight, or obese, giving a general idea of your overall health.

How does the Calorie Calculator work?

The calculator uses scientific formulas such as the Mifflin-St Jeor Equation or Harris-Benedict Equation to estimate your Basal Metabolic Rate (BMR) and then multiplies it by your activity factor to calculate your daily calorie needs.

How many calories should I eat to lose weight?

To lose weight, you need to consume fewer calories than your body burns. A safe and sustainable approach is to reduce your daily intake by 500–750 calories, which can result in a weight loss of about 0.5–1 kg per week.

Does the Calorie Calculator work for everyone?

Yes, it provides an accurate estimate for most people. However, individual calorie needs can vary based on metabolism, body composition, and lifestyle. For personalized advice, it’s best to consult a dietitian or healthcare provider.

How can I use the Calorie Calculator effectively?

Use the calculator regularly to track your progress. Combine it with healthy eating habits, portion control, and consistent physical activity for the best results.