Tip: Track body weight trend for 2–3 weeks, then adjust intake by 100–200 kcal if progress is too slow or too fast.
What Is TDEE?
Total Daily Energy Expenditure (TDEE) is the number of calories your body burns in a day. It includes everything: your resting metabolism, movement, exercise, and even digestion. If you consistently eat close to your TDEE, your body weight tends to stay stable over time.
Think of TDEE as your practical starting point for nutrition planning. Whether your goal is fat loss, maintenance, or muscle gain, the first step is understanding how many calories you likely need.
How This TDEE Calculator Works
This calculator uses the Mifflin–St Jeor equation to estimate BMR (Basal Metabolic Rate), then multiplies it by your activity level to estimate TDEE.
Step 1: Estimate BMR
BMR is the energy your body would burn at complete rest. It covers breathing, circulation, temperature regulation, and other essential life functions.
- Male: BMR = (10 × weight kg) + (6.25 × height cm) − (5 × age) + 5
- Female: BMR = (10 × weight kg) + (6.25 × height cm) − (5 × age) − 161
Step 2: Apply an Activity Multiplier
Your BMR is multiplied by an activity factor to account for daily movement and training:
- Sedentary: 1.2
- Lightly Active: 1.375
- Moderately Active: 1.55
- Very Active: 1.725
- Extremely Active: 1.9
Using TDEE for Your Goal
Fat Loss
Create a calorie deficit below TDEE. A 10% to 20% deficit is usually sustainable for most people. Larger deficits can work short-term but may increase hunger, fatigue, and muscle loss risk.
- Start with a 10% deficit if you are new to dieting or already fairly lean.
- Use a 15%–20% deficit if you have more fat to lose and good diet adherence.
- Keep protein high to protect muscle while losing weight.
Maintenance
Eating around your TDEE supports stable weight and performance. This is useful after a fat-loss phase or when focusing on athletic output, health, and consistency.
Muscle Gain
Use a small calorie surplus above TDEE. Most people gain best with a modest 5%–10% increase. A huge surplus does not automatically mean faster muscle gain; it usually means more fat gain.
Macro Guidance (Simple Starting Point)
The calculator gives a basic macro split to help you get started:
- Protein: Higher when cutting, moderate when maintaining or gaining.
- Fat: Set at a baseline level to support hormones and health.
- Carbs: Fill the remaining calories for training performance and recovery.
These are starting numbers, not strict rules. Adjust based on your digestion, appetite, training demands, and food preferences.
Why Estimated Calories Can Be Off
No online calculator can perfectly predict your exact calorie needs. Two people with the same age, height, and weight can have different metabolisms and activity habits. Use the estimate as a baseline, then calibrate with real data.
- Daily steps can vary more than you think.
- Exercise burn is often overestimated by wearables.
- Sleep, stress, and menstrual cycle changes can affect weight trends.
- Food label and portion errors are common.
How to Adjust After 2–3 Weeks
If Fat Loss Is Too Slow
- Reduce calories by 100–200 per day, or
- Increase daily movement (for example, +2,000 steps/day).
If Weight Is Dropping Too Fast
- Add 100–200 calories per day to preserve energy and muscle.
If You Are Trying to Gain but Scale Is Flat
- Add 100–150 calories daily and reassess after two weeks.
Common TDEE Mistakes
- Choosing an activity level based on workouts only, not total daily movement.
- Changing calories every few days before enough trend data accumulates.
- Ignoring protein intake while in a calorie deficit.
- Not tracking liquids, oils, sauces, or weekend portions.
- Comparing one week of scale fluctuations instead of monthly trends.
Practical Bottom Line
Use this TDEE calculator to get a strong starting estimate. Then track body weight and performance, make small adjustments, and stay consistent. Nutrition success is usually not about finding a perfect formula once—it is about using feedback and refining your intake over time.
Note: This tool is for educational use and does not replace medical advice. If you have health conditions, a history of disordered eating, or specific clinical needs, consult a qualified healthcare professional or registered dietitian.