How to Calculate Calorie Deficit
Understanding how to calculate calorie deficit is essential for effective weight loss. A calorie deficit occurs when you consume fewer calories than your body burns, forcing it to use stored fat for energy.
Step-by-Step: How Do You Calculate Calorie Deficit?
Step 1: Calculate Your BMR (Basal Metabolic Rate)
Your BMR represents the calories your body burns at rest. Use the BMR calculator or the Mifflin-St Jeor equation:
- Men: BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age) + 5
- Women: BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age) - 161
Step 2: Calculate Your TDEE (Total Daily Energy Expenditure)
Multiply your BMR by your activity level multiplier:
- Sedentary (little/no exercise): BMR × 1.2
- Lightly active (1-3 days/week): BMR × 1.375
- Moderately active (3-5 days/week): BMR × 1.55
- Very active (6-7 days/week): BMR × 1.725
- Super active (athlete): BMR × 1.9
Use our TDEE calculator for instant results.
Step 3: Determine Your Calorie Deficit
Subtract your target deficit from your TDEE:
Recommended Calorie Deficit Levels
| Deficit | Weight Loss Rate | Best For |
|---|---|---|
| 200 calories | 0.2 kg/week | Slow, sustainable loss |
| 300 calories | 0.3 kg/week | Moderate pace |
| 500 calories | 0.5 kg/week | Standard approach |
| 1000 calories | 1 kg/week | Aggressive (supervised) |
Practical Example: Calculating Calorie Deficit
Let's calculate for a 30-year-old woman, 70 kg, 165 cm, moderately active:
- BMR: (10 × 70) + (6.25 × 165) - (5 × 30) - 161 = 1,421 calories
- TDEE: 1,421 × 1.55 = 2,203 calories
- 500-calorie deficit: 2,203 - 500 = 1,703 calories/day
This creates a deficit that should result in approximately 0.5 kg weight loss per week.
Use Our Calculator for Instant Results
Skip the math! Our calorie deficit calculator does all these calculations instantly, providing personalized recommendations for your goals.
Adjust Based on Results
Monitor your progress weekly. If you're not losing weight after 2-3 weeks, reduce calories by 100-200 or increase activity. Learn more about what is calorie deficit.
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