Calorie Intake Calculator

Daily Calorie Intake Calculator — How Many Calories Should You Eat?

Understanding your daily calorie needs is the foundation of any successful nutrition plan. Whether your goal is weight loss, muscle gain, or simply maintaining a healthy lifestyle, knowing how many calories your body requires each day helps you make informed decisions about your diet. Our calorie intake calculator uses the scientifically validated Mifflin-St Jeor equation to estimate your Basal Metabolic Rate (BMR) — the calories your body burns at complete rest — and then adjusts for your activity level to give you a personalized daily calorie target. Learn more about how many calories you should eat a day and the factors that influence your daily energy needs.

The Mifflin-St Jeor equation is widely considered the most accurate BMR formula for the general population, outperforming the older Harris-Benedict equation in multiple studies. Read our detailed guide on the Mifflin-St Jeor equation and how it calculates BMR to understand the science behind this calculator. By factoring in your age, weight, height, gender, and activity level, our calculator provides an estimate you can trust as a starting point for your fitness journey. Use the results alongside our BMI calculator and daily protein calculator for a complete picture of your nutritional needs.

How to Use the Calorie Intake Calculator

Using this calorie calculator is simple. Follow these steps to get your personalized daily calorie estimate:

1. Enter your weight in kilograms (1 kg = 2.2 lbs).
2. Enter your height in centimeters (1 cm = 0.39 inches).
3. Enter your age in years. BMR naturally decreases with age.
4. Select your gender — male or female. Men typically have higher BMR due to greater muscle mass.
5. Choose your activity level from sedentary to super active. Not sure which to pick? Read our guide on activity level multipliers and TDEE factors to choose accurately.
6. Click "Calculate" to see your estimated daily calorie needs for weight maintenance.

Example Calculation

For a 30-year-old female weighing 65 kg, standing 160 cm tall, with a moderately active lifestyle (exercises 3–5 days per week):

• Weight: 65 kg
• Height: 160 cm
• Age: 30 years
• Gender: Female
• Activity Level: Moderately active

Result: approximately 2,100–2,300 calories per day to maintain current weight.

How to Use Your Results for Weight Loss

For weight loss, aim for a deficit of 300–500 calories below your maintenance level for sustainable results of 0.5–1 lb per week. Our guide on how many calories to eat to lose weight walks you through creating a safe calorie deficit. You can also use our dedicated calorie calculator for weight loss approach, which explains how to set your target based on your specific goals. For a deeper understanding of safe deficits, read about how many calories per day create a safe deficit for weight loss.

How to Use Your Results for Muscle Gain

For muscle gain, a surplus of 300–500 calories combined with strength training supports lean muscle development without excessive fat gain. Our guide on how to calculate calorie intake for muscle gain explains how to adjust your numbers for bulking. Always pair your calorie target with adequate protein intake — use our daily protein calculator to find your optimal protein range. For a complete overview of how this calculator works, see our daily calorie calculator guide.