How Many Calories Should You Eat to Lose Weight? Here's How to Find Your Number

"How many calories should I eat to lose weight?" is one of the most-searched questions in the entire fitness space — and for good reason. It's the right question to ask. Without a number to aim for, you're essentially navigating without a map.

The honest answer is: it depends on you. Your calorie target for weight loss is personal, based on your body, your activity level, and how fast you want to lose weight. But the calculation isn't complicated, and once you have your number, everything else falls into place.

Step 1: Understand What "Calories to Lose Weight" Actually Means

Your body burns a certain number of calories every day through a combination of your resting metabolism (just keeping you alive) and physical activity. To lose weight, you need to consistently eat fewer calories than that daily burn. The gap between what you eat and what you burn is your calorie deficit, and it's what drives fat loss.

A deficit of about 3,500 calories is roughly equivalent to one pound of fat. So a 500-calorie daily deficit over one week produces approximately one pound of fat loss — a well-established and sustainable rate.

Step 2: Calculate Your TDEE (Total Daily Energy Expenditure)

Your TDEE is the total number of calories your body burns on a typical day. It's made up of:

• BMR (Basal Metabolic Rate): Calories burned at complete rest — just existing. This makes up 60–75% of your total burn.
• Thermic Effect of Food (TEF): Calories burned digesting and processing what you eat (~10% of total).
• Physical Activity: Exercise, steps, and general movement — the most variable part.

The most accurate way to estimate TDEE is the Mifflin-St Jeor equation for BMR, then multiply by an activity factor:

Real-World Examples

Here's what this looks like for a few different people:

• Woman, 30, 5'5" (165cm), 155 lbs (70kg), lightly active: TDEE ≈ 1,950 cal/day. For 1 lb/week loss: eat ~1,450 cal/day.
• Man, 32, 5'11" (180cm), 200 lbs (91kg), moderately active: TDEE ≈ 2,800 cal/day. For 1 lb/week loss: eat ~2,300 cal/day.
• Woman, 27, 5'3" (160cm), 140 lbs (64kg), sedentary: TDEE ≈ 1,700 cal/day. For 0.5 lb/week loss: eat ~1,450 cal/day.

Notice that the same calorie intake (e.g., 1,450 calories) means different things for different bodies. That's why generic "eat 1,200 calories" advice is unhelpful — and sometimes harmful.

Choosing Your Deficit: How Fast Do You Want to Lose?

Speed of loss involves a real trade-off:

• 0.5 lb/week (250 cal deficit): Very gentle. Ideal for people close to their goal weight or who've struggled with restrictive eating. Less muscle loss, easier to sustain.
• 1 lb/week (500 cal deficit): The most commonly recommended rate. Effective for most people. Clear enough progress to stay motivated.
• 1.5–2 lbs/week (750–1,000 cal deficit): Faster results, but harder to stick to. Increases the risk of losing muscle alongside fat and can lead to fatigue and cravings. Only appropriate for those with a significant amount to lose.

When to Adjust Your Calorie Target

Weight loss is rarely perfectly linear, but if you've been consistent for 3–4 weeks and the scale hasn't moved at all, it's worth auditing:

1. Are you tracking everything? Cooking oils, condiments, and drinks are common hidden sources. Even bites while cooking add up.
2. Have you lost enough weight that your TDEE has dropped? As you lose weight, you burn fewer calories. Recalculate your TDEE every 10–15 lbs of loss.
3. Has your activity level changed? If you started exercising, your TDEE is higher. If you became more sedentary, it's lower.

If tracking seems accurate but progress has stalled for more than 3 weeks, reduce your daily target by 100–150 calories and monitor for another 2–3 weeks before adjusting again.

The Couple Consideration: Different Numbers, Same Goal

If you're tracking with your partner, you'll almost certainly have different calorie targets — and that's completely normal. Biological differences, activity levels, and starting weights all mean two people in the same household can have targets that differ by 500–800 calories or more.

This doesn't mean cooking different meals. It means different portion sizes. Your partner's 500-calorie dinner is the same food as your 400-calorie dinner — just a slightly bigger scoop of rice. Plan for this in advance, and it becomes second nature.

Frequently Asked Questions

• Is 1,200 calories a day safe? For many women, 1,200 is a recognized floor below which nutrient intake becomes genuinely difficult to maintain without supplementation. It's not universally unsafe, but it should be a floor — not a default starting point. Many people (especially taller or more active individuals) will lose weight just fine eating far more.
• Should I eat back calories I burn through exercise? Partially. If you exercise significantly (burning 400+ calories), eating back 50–60% of that burn is a reasonable rule of thumb. Calorie burn estimates from watches and machines tend to be inflated, so a partial eat-back helps account for that while avoiding too large a deficit.
• Does it matter when I eat my calories? Total daily calories is what determines weight change — not specific timing. That said, eating more earlier in the day and keeping dinners lighter is associated with better hunger management for many people.
• How do I know if my calorie target is too low? Warning signs: constant hunger, fatigue, difficulty concentrating, irritability, or waking up hungry at night. If you experience any of these consistently, increase your target by 100–200 calories.

The Bottom Line

Your daily calorie target for weight loss is a number that's personal to you, derived from your TDEE minus a sustainable deficit. For most people, this works out to somewhere between 1,400 and 2,200 calories depending on size and activity — with a 500-calorie deficit being the most widely validated and sustainable rate.

Calculate your number, start tracking, and give it four consistent weeks. The scale will follow the math.