If you have ever wondered how many calories to eat to lose weight, the answer starts with your BMR. Your BMR (Basal Metabolic Rate) is the number of calories your body burns at complete rest. To create a safe calorie deficit, you first need your BMR from our BMR calculator.
Why Calorie Counting Works
Weight loss comes down to energy balance. Eat less than you burn, and you lose weight. Eat more, and you gain. That is simple physics.
But how many calories to eat to lose weight depends entirely on your unique body – your age, weight, height, sex, and activity level. There is no single number that works for everyone.
That is why using a personalised method based on your BMR and TDEE is the most effective approach.
Step 1: Find Your BMR
Your BMR is your baseline. It is the minimum energy your body needs just to survive. You cannot eat below this number for long without harming your metabolism.
👉 Use our BMR calculator to get your number in seconds.
Example: A 30‑year‑old female, 65 kg, 165 cm has a BMR of 1,370 calories/day.
Step 2: Calculate Your TDEE
Your TDEE (Total Daily Energy Expenditure) is your BMR plus all daily movement – walking, typing, exercising, and digesting food. This is your maintenance calories.
Multiply your BMR by your activity level:
| Activity Level | Multiplier |
|---|---|
| Sedentary (desk job, no exercise) | BMR × 1.2 |
| Lightly active (light exercise 1‑3 days/week) | BMR × 1.375 |
| Moderately active (moderate exercise 3‑5 days/week) | BMR × 1.55 |
| Very active (hard exercise 6‑7 days/week) | BMR × 1.725 |
| Extremely active (physical job + hard exercise) | BMR × 1.9 |
Example continued: The female exercises 3‑4 times per week → moderately active (1.55).
Her TDEE = 1,370 × 1.55 = 2,123 calories/day.
That means she burns about 2,123 calories on an average day. To maintain her weight, she would eat 2,123 calories. To lose weight, she eats less than that.
Step 3: Create a Safe Calorie Deficit
A calorie deficit means eating fewer calories than your TDEE. The standard recommendation for safe, sustainable weight loss is a deficit of 300 to 500 calories per day.
Example:
TDEE = 2,123
Subtract 400 → target intake = 1,723 calories/day
At this deficit, she would lose approximately 0.3‑0.5 kg (0.7‑1 lb) per week – a healthy rate that preserves muscle.
The Golden Rule: Never Eat Below Your BMR
Your BMR (1,370 in the example) is the floor. If you eat below your BMR, your body will:
- Slow down your metabolism to conserve energy
- Break down muscle for fuel
- Make you feel tired, cold, and hungry
- Increase the likelihood of weight regain later
Safe target: Above BMR but below TDEE. In the example, 1,723 is safely above 1,370.
How Many Calories to Eat to Lose Weight – By the Numbers
| Your TDEE | Deficit 300 | Deficit 500 | Safe Target Range |
|---|---|---|---|
| 2,000 | 1,700 | 1,500 | 1,500‑1,700 |
| 2,200 | 1,900 | 1,700 | 1,700‑1,900 |
| 2,400 | 2,100 | 1,900 | 1,900‑2,100 |
| 2,600 | 2,300 | 2,100 | 2,100‑2,300 |
| 2,800 | 2,500 | 2,300 | 2,300‑2,500 |
Note: These ranges assume your BMR is below the lower number. Always check your own BMR first.
Adjusting for Your Specific Goal
If your TDEE is below 1,800 calories (common for small, sedentary women), a 500‑calorie deficit might put you below your BMR. In that case:
- Reduce the deficit to 250‑300 calories
- Increase activity to raise your TDEE
- Accept slower weight loss – 0.2‑0.3 kg per week is still progress
For those looking to build muscle after weight loss, see our guide on how many calories to build muscle.
Common Mistakes When Deciding How Many Calories to Eat to Lose Weight
❌ Cutting too low – Eating 1,200 calories when your BMR is 1,600 will backfire. You will lose muscle, feel terrible, and regain weight quickly.
❌ Ignoring protein – During a calorie deficit, you need more protein to preserve muscle. Aim for 1.6‑2.2 g per kg of body weight. Read our how much protein per day to build muscle guide for details.
❌ Not adjusting as you lose weight – Your BMR drops when you weigh less. Recalculate every 5‑10 kg (10‑20 lb). This is also covered in our maintenance calories article.
❌ Being too strict – It is fine to eat at maintenance one or two days per week. Consistency over perfection wins.
How to Track Your Intake
- Use a food diary – MyFitnessPal, Cronometer, or a notebook.
- Weigh your food – At least for the first two weeks, to learn portion sizes.
- Log everything – Cooking oil, sauces, drinks, snacks.
- Weigh yourself weekly – Same day, same time, same scale.
- Adjust after 2‑3 weeks – No weight loss? Lower calories by 100. Too fast (over 1 kg per week)? Add 100‑200 calories.
The Role of Exercise
You do not need exercise to lose weight – a calorie deficit alone works. However, exercise helps by:
- Raising your TDEE (so you can eat more while still losing)
- Preserving muscle mass during the deficit
- Improving insulin sensitivity and metabolic health
Strength training is especially valuable because it raises your BMR over time. Learn how to increase metabolism naturally – muscle is the key.
Frequently Asked Questions
How many calories to eat to lose weight if I am sedentary?
Start with TDEE minus 300. If you are very small, minus 200 may be safer. Never go below your BMR.
Can I lose weight by eating exactly at my BMR?
Only if your BMR equals your TDEE – which only happens if you are completely bedridden. For most people, eating at BMR is too low. Use our TDEE calculator to find your true maintenance number first.
How quickly will I lose weight with a 500‑calorie deficit?
About 0.5 kg (1 lb) per week. One kg of body fat equals roughly 7,700 calories, so a 500‑calorie daily deficit leads to 3,500 calories per week = 0.45 kg.
Does intermittent fasting change how many calories to eat to lose weight?
No. Your calorie target remains the same. Intermittent fasting is a timing strategy, not a calorie strategy. See our intermittent fasting beginner’s guide for more.
What if I hit a weight loss plateau?
Re‑calculate your BMR and TDEE. As you lose weight, your maintenance calories drop. You may need to reduce your intake further or increase activity.