Disclaimer: This calculator provides estimates based on population averages. Individual needs vary. Consult a healthcare provider before starting any new diet or exercise program.
Your Results
Lose Weight
Maintain
Build Muscle
BMR (Basal Metabolic Rate)
1,661 cal
TDEE (Total Daily Energy)
2,284 cal
Target Calories
1,784 cal
Daily Deficit/Surplus
-500 cal
Estimated Weekly Change
-1.0 lb
Activity Level Guide
| Activity Level | Description | Multiplier |
|---|
| Sedentary | Little to no exercise, desk job | 1.2 |
| Lightly Active | Light exercise 1-3 days/week | 1.375 |
| Moderately Active | Moderate exercise 3-5 days/week | 1.55 |
| Very Active | Hard exercise 6-7 days/week | 1.725 |
| Extra Active | Very hard exercise + physical job | 1.9 |
Why Calorie Awareness Matters
Understanding your daily calorie needs is the foundation of any successful nutrition plan. Whether you want to lose weight, build muscle, or maintain your current physique, knowing exactly how many calories your body requires puts you in control.
The Science of Energy Balance
Your body weight is determined by the balance between calories consumed and calories burned. A caloric surplus leads to weight gain, a deficit leads to weight loss, and balance maintains your current weight. Every pound of body fat contains approximately 3,500 calories.
Understanding TDEE
Your Total Daily Energy Expenditure (TDEE) consists of four components: Basal Metabolic Rate (60-75% of calories), Thermic Effect of Food (10%), Exercise Activity (varies), and Non-Exercise Activity Thermogenesis (NEAT, which can vary by 2,000 calories/day between individuals).
The Mifflin-St Jeor Equation
Our calculator uses the Mifflin-St Jeor formula, which studies show is the most accurate for predicting BMR. For men: BMR = (10 × weight kg) + (6.25 × height cm) - (5 × age) + 5. For women: BMR = (10 × weight kg) + (6.25 × height cm) - (5 × age) - 161.
Calorie Targets for Different Goals
For weight loss, a safe rate is 0.5-1% of body weight per week with a 300-500 calorie deficit. For muscle gain, a 200-500 calorie surplus above TDEE is recommended, paired with resistance training. For maintenance, eat at your calculated TDEE and monitor weight trends.
Common Calorie Counting Mistakes
- Underestimating portion sizes
- Forgetting liquid calories (coffee drinks, smoothies, alcohol)
- Ignoring cooking oils (1 tbsp olive oil = 120 calories)
- Inconsistent tracking (weekend splurges undo weekly deficits)
- Not adjusting for activity changes
- Being too restrictive (triggers binge eating and metabolic adaptation)
FAQ
How accurate is this calculator? The Mifflin-St Jeor equation is accurate within ±10% for most people. Individual variation exists, so treat the result as a starting point and adjust based on real-world results.
Should I eat back exercise calories? If using the activity multiplier, you've already accounted for exercise. Don't double-count unless you're using the sedentary multiplier.
Why did I stop losing weight? This is metabolic adaptation. As you lose weight, your BMR decreases. Recalculate your TDEE every 10-15 lbs lost. A 1-2 week diet break at maintenance can help reset hormones.
Disclaimer: This calculator provides estimates based on population averages. Individual needs vary based on genetics, medical conditions, and lifestyle factors. Consult a healthcare provider before starting any new diet or exercise program.