TDEE Calculator
About This Calculator
Calculate Total Daily Energy Expenditure (TDEE) based on BMR, activity level, and exercise frequency. Get personalized calorie targets for weight loss, maintenance, or muscle gain. Compare Mifflin-St Jeor and Harris-Benedict formulas with accurate macronutrient recommendations for 2025.
Frequently Asked Questions
What is TDEE and how is it calculated?
TDEE (Total Daily Energy Expenditure) is the total calories your body burns in 24 hours including all activity. Formula: TDEE = BMR 脳 Activity Multiplier. BMR (Basal Metabolic Rate) is calories burned at rest, calculated using Mifflin-St Jeor equation: Men: (10 脳 weight kg) + (6.25 脳 height cm) - (5 脳 age) + 5. Women: (10 脳 weight kg) + (6.25 脳 height cm) - (5 脳 age) - 161. Activity multipliers: Sedentary (desk job, no exercise) = 1.2, Light activity (1-2 days/week exercise) = 1.375, Moderate (3-5 days/week) = 1.55, Very active (6-7 days/week) = 1.725, Athlete (2x daily training) = 1.9. Example: 30-year-old woman, 70kg, 165cm, moderate activity: BMR = 1,432 cal, TDEE = 1,432 脳 1.55 = 2,220 calories/day.
How do I use TDEE for weight loss or muscle gain?
Weight loss: Eat 15-25% below TDEE (300-500 cal deficit). TDEE 2,000 cal 鈫?eat 1,500-1,700 cal for 0.5-1 lb loss/week. Muscle gain: Eat 10-20% above TDEE (200-400 cal surplus). TDEE 2,500 cal 鈫?eat 2,700-2,900 cal for 0.25-0.5 lb gain/week. Maintenance: Eat at TDEE exactly. Track weight weekly and adjust calories if not progressing鈥攎etabolism adapts over time. Prioritize protein: 0.8-1g per lb bodyweight for muscle preservation during cuts or growth during bulks. Recalculate TDEE every 10-15 lbs weight change as BMR decreases with weight loss or increases with muscle gain.
How accurate is the Tdee Calculator compared to clinical measurements?
This calculator uses peer-reviewed medical formulas that provide reliable estimates for most adults. However, individual results can vary based on factors not captured by standard formulas, including body composition, genetic factors, medical conditions, and medications. These calculations are screening tools, not diagnostic instruments. For medical decision-making, always consult your healthcare provider who can consider your complete health history, perform physical examinations, and order appropriate lab tests for definitive measurements.
Should I consult a doctor before acting on these results?
Yes, we recommend discussing any health-related calculations with your healthcare provider before making significant changes to your diet, exercise routine, or health management plan. This calculator provides educational estimates based on population-level research and standard medical formulas. Your individual health needs may differ due to pre-existing conditions, medications, allergies, pregnancy, age-related factors, or other personal health variables. Your doctor can interpret these results in the context of your complete medical history and provide personalized recommendations.
What factors can make my results different from what this calculator shows?
Several factors can cause your actual values to differ from calculated estimates: age and sex (formulas may use population averages), body composition (muscle vs fat ratio affects many health metrics), genetics and family history, current medications (some affect metabolism, blood pressure, or cholesterol), chronic conditions (diabetes, thyroid disorders, kidney disease), altitude and climate, hydration status, time of day when measurements are taken, and recent food intake or exercise. For the most accurate baseline, take measurements at the same time each day under consistent conditions.
What is TDEE and how is it different from BMR?
TDEE (Total Daily Energy Expenditure) is the total number of calories you burn per day including all activities. BMR (Basal Metabolic Rate) is calories burned at complete rest — just to keep your organs functioning. TDEE = BMR × Activity Factor. Typical activity multipliers: sedentary (1.2), lightly active (1.375), moderately active (1.55), very active (1.725), extremely active (1.9). A person with 1,600 BMR who exercises 3-4 times per week (moderately active) has a TDEE of approximately 2,480 calories. Understanding your TDEE is essential for weight management — eat below TDEE to lose weight, above to gain.
How accurate are TDEE calculators and should I trust the numbers?
TDEE calculators provide estimates with 10-20% margin of error. The Mifflin-St Jeor equation (most commonly used) is accurate for about 70% of people. Factors that reduce accuracy include: unusual body composition (very muscular or very high body fat), medical conditions affecting metabolism (thyroid disorders, PCOS), medications, and genetic variation. Use the calculated TDEE as a starting point, then adjust based on real-world results over 2-4 weeks. If you are not losing or gaining weight as expected, adjust intake by 200-300 calories and reassess. Tracking food intake accurately (using a food scale) matters more than the initial TDEE estimate.