Calculate your Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE) in under a minute. Spirit Fitzone's free AI-powered calculator gives you personalized tips plus recommendations from our Kuwait protein-bar and drinks catalog — tailored to your goal.
This formula is scientifically validated and more accurate than the older Harris-Benedict equation:
We then multiply BMR by your activity factor (1.2 for sedentary up to 1.9 for athletes) to get your TDEE — your real daily need.
BMR is the number of calories your body needs to perform essential functions at rest — breathing, blood circulation, cell repair. It accounts for about 60–75% of your total daily calorie burn.
BMR is the calories burned at complete rest. TDEE (Total Daily Energy Expenditure) multiplies your BMR by your activity level to give your realistic daily calorie need — the number you eat to stay at current weight.
We use the Mifflin-St Jeor equation, which the American Dietetic Association recognizes as the most accurate formula for most adults. It gives more realistic numbers than the older Harris-Benedict equation.
The calculator is typically accurate within ±10% for most people. Accuracy is highest for adults between 18 and 65 with a normal body composition. Athletes with high muscle mass may want to use the Katch-McArdle formula instead.
To lose weight safely, eat about 500 calories below your TDEE per day — this creates a steady 0.5 kg/week loss. Pair it with 1.6-2.2g of protein per kg of bodyweight and 30+ minutes of movement daily.
For general health: 0.8-1g per kg of bodyweight. For muscle building: 1.6-2.2g per kg. For fat loss while training: 2.0-2.4g per kg. Spread it across 4 meals for best absorption (25-40g per meal).
Yes. Spirit Fitzone stocks heat-stable, high-protein bars and ready-to-drink shakes that don't need refrigeration — perfect for Kuwait's weather, gym bags, and travel.
Yes, but remember your eating window is shorter. Target the same daily TDEE but split across Iftar and Suhoor. Prioritize protein + slow-digesting carbs at Suhoor to stay fuller longer during fasting hours.
Spirit Fitzone is Kuwait's #1 destination for protein bars, protein drinks, supplements, and healthy snacks. Use the BMR calculator above to find your daily calorie and protein needs — whether your goal is weight loss, muscle gain, or maintenance. Same-day delivery within 3-6 hours across all Kuwait areas.
