Calorie Calculator

Calculate your daily calorie needs, BMR, and TDEE

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Your Daily Calorie Target
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BMR (Basal Metabolic Rate)
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TDEE (Total Daily Energy Expenditure)
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BMI
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Protein Target
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Carbs Target
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Fat Target

How It Works

Our calorie calculator uses the Mifflin-St Jeor equation to calculate your Basal Metabolic Rate (BMR) - the calories your body burns at rest. Then we factor in your activity level to determine your Total Daily Energy Expenditure (TDEE).

BMR Formula (Mifflin-St Jeor)

Men: BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age in years) + 5

Women: BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age in years) - 161

Understanding Your Results

BMR (Basal Metabolic Rate): The calories your body burns at complete rest. This is the minimum energy needed for vital functions like breathing and circulation.

TDEE (Total Daily Energy Expenditure): Your actual daily calorie needs including all activities. This is your maintenance calorie level.

Weight Loss: We subtract 500 calories/day for 1 lb/week loss (3500 calories = 1 lb fat)

Frequently Asked Questions

How many calories do I need after gastric bypass or sleeve surgery?
Post-surgery calorie needs vary by phase. Recent patients (0-6 months) typically need 800-1000 calories with 60-80g protein. Recovery phase (6-12 months) needs 1000-1200 calories. Long-term maintenance usually stabilizes at 1200-1500 calories. Always follow your surgeon's specific guidelines and prioritize protein at every meal.
What is TDEE?
TDEE stands for Total Daily Energy Expenditure. It's the total number of calories your body burns in a day, including your basal metabolic rate (BMR) plus calories burned through activity and digestion.
How accurate is this calorie calculator?
This calculator uses the Mifflin-St Jeor equation, which is considered the most accurate formula for estimating BMR and TDEE. However, individual results may vary by 5-10% due to genetic factors and metabolism variations.
Should I use metric or imperial units?
Both systems work identically - the calculator automatically converts between them. Use whichever you're most comfortable with. The calculator can auto-detect based on your browser settings.
How many calories should I eat to lose weight?
To lose 1 pound per week, subtract 500 calories from your TDEE (maintenance calories). For 2 pounds per week, subtract 1000 calories. Never go below 1200 calories/day for women or 1500 for men without medical supervision.