Free Calorie Calculator
Find your daily calorie needs for weight loss, maintenance, or weight gain — free, instant, no signup.
Your Results
Basal Metabolic Rate (BMR)
Total Daily Calorie Needs
Calorie Goals
Weight Loss
Maintenance
Weight Gain
These are estimates based on the Mifflin-St Jeor formula. Individual calorie needs vary. This is not a substitute for advice from a registered dietitian or healthcare professional.
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What is a Calorie Calculator?
A calorie calculator estimates how many calories your body needs each day based on your age, gender, height, weight, and activity level. It calculates your Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE) — giving you a clear daily calorie target for weight loss, maintenance, or weight gain.
This free calorie calculator uses the Mifflin-St Jeor equation, the most accurate formula recommended by nutritionists worldwide.
How to Calculate Your Daily Calorie Needs
To calculate your daily calorie needs, you first need to determine your Basal Metabolic Rate (BMR). BMR is the number of calories your body needs at rest just to stay alive. Then, multiply your BMR by an activity factor to account for your activity level. This result is called your Total Daily Energy Expenditure (TDEE), which represents the total calories your body uses per day.
Calorie Calculator Formula (Mifflin-St Jeor)
This calorie calculator uses the Mifflin-St Jeor Equation for accurate BMR calculation:
- For men: BMR = 10 × weight (kg) + 6.25 × height (cm) – 5 × age (years) + 5
- For women: BMR = 10 × weight (kg) + 6.25 × height (cm) – 5 × age (years) – 161
This equation is one of the most accurate BMR estimates and is widely used by nutritionists and fitness professionals.
Activity Levels and Their Impact on Calorie Burn
Besides your base metabolic rate, the most important factor for your daily calorie needs is your physical activity level. Here are the various activity factors to adjust your BMR according to your activity level:
- Sedentary (1.2): Little or no physical activity, such as office work
- Lightly Active (1.375): Light exercise/sports 1-3 days/week
- Moderately Active (1.55): Moderate exercise/sports 3-5 days/week
- Very Active (1.725): Hard exercise/sports 6-7 days/week
- Super Active (1.9): Very hard exercise/physical job or 2x training
How Many Calories Per Day by Age
| Age Group | Women (Sedentary) | Women (Active) | Men (Sedentary) | Men (Active) |
|---|---|---|---|---|
| 18–25 yrs | 1,800 cal | 2,400 cal | 2,400 cal | 3,000 cal |
| 26–35 yrs | 1,800 cal | 2,200 cal | 2,200 cal | 2,800 cal |
| 36–45 yrs | 1,700 cal | 2,100 cal | 2,200 cal | 2,600 cal |
| 46–55 yrs | 1,600 cal | 2,000 cal | 2,100 cal | 2,600 cal |
| 56–65 yrs | 1,600 cal | 1,800 cal | 2,000 cal | 2,400 cal |
| 65+ yrs | 1,500 cal | 1,800 cal | 2,000 cal | 2,200 cal |
Note: These are general estimates. Use the calculator above for your exact personalized daily calorie requirement.
How Many Calories Should You Eat to Lose or Gain Weight?
For weight maintenance, you should eat calories equal to your TDEE. For weight loss, you need to create a calorie deficit – typically a deficit of 500 calories per day leads to about 1 pound of weight loss per week. For weight gain, you need to create a calorie surplus – typically an extra 500 calories per day. This can vary according to your metabolism and personal goals.
One pound of fat equals approximately 3,500 calories, so a daily deficit of 500 calories results in about 1 pound of weight loss per week. However, the most recommended rate for sustainable and healthy weight loss is 1-2 pounds (0.5-1 kg) per week.
Benefits of Using This Free Online Calorie Calculator
Using our calorie calculator offers several advantages:
- Get accurate calorie requirements based on your individual body metrics
- Understand how your activity level affects your calorie needs
- Determine realistic calorie targets for weight loss, maintenance, or weight gain
- Establish a foundation for improving your meal planning and achieving your fitness goals
- Make data-driven decisions based on scientifically designed equations rather than relying on external myths or generalizations about calorie estimates
Daily Calorie Needs for Indians
Average calorie needs for Indians vary based on body size, climate, and activity levels. The Indian Council of Medical Research (ICMR) recommends the following daily calorie intake:
| Group | Calories/Day |
|---|---|
| Sedentary adult woman | 1,660 cal |
| Moderately active woman | 1,900 cal |
| Sedentary adult man | 2,110 cal |
| Moderately active man | 2,710 cal |
| Pregnant woman | +350 cal extra |
| Breastfeeding woman | +600 cal extra |
These figures are based on ICMR-NIN 2020 guidelines for Indian adults with average body weight.