How Many Calories to Lose Weight? Calculator & Guide

!Healthy food and nutrition

Weight loss ultimately comes down to one principle: calorie deficit. Consume fewer calories than your body burns, and you'll lose weight. But how many calories exactly? Too few and you'll feel terrible; too many and you won't see results.

In this comprehensive guide, we'll help you calculate your personalized calorie target for safe, sustainable weight loss. Use our Calorie Calculator for quick computation.

The Calorie Deficit Equation

`` Weight Loss = Calories In < Calories Out (CICO) `

Your body burns a certain number of calories daily (TDEE - Total Daily Energy Expenditure). Eat less than this, and your body uses stored fat for energy, resulting in weight loss.

The Numbers

Deficit	Weekly Fat Loss
250 cal/day	~0.2 kg/week
500 cal/day	~0.5 kg/week
750 cal/day	~0.7 kg/week
1,000 cal/day	~1 kg/week

Note: 1 kg of fat ≈ 7,700 calories. To lose 1 kg/week, you need a 1,100 cal/day deficit—which is aggressive and not suitable for everyone.

Step 1: Calculate Your TDEE

TDEE is how many calories you burn daily, including all activity.

Use This Formula (Mifflin-St Jeor)

For Men: ` BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age) + 5 ` For Women: ` BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age) - 161 `` Then multiply by Activity Factor:

Activity Level	Factor
Sedentary (office work, no exercise)	1.2
Lightly Active (1-2 days/week)	1.375
Moderately Active (3-5 days/week)	1.55
Very Active (6-7 days/week)	1.725
Extremely Active (physical job + exercise)	1.9

Example Calculation

Person: 35-year-old woman, 70kg, 165cm, moderately active

BMR = (10 × 70) + (6.25 × 165) - (5 × 35) - 161

BMR = 700 + 1,031 - 175 - 161 = 1,395 calories

TDEE = 1,395 × 1.55 = 2,162 calories/day

This person burns approximately 2,162 calories daily.

Use our TDEE Calculator for precise calculations.

Step 2: Set Your Calorie Target

Subtract your chosen deficit from TDEE:

Goal	Deficit	Example (TDEE 2,162)
Slow & steady	250 cal	1,912 cal/day
Moderate loss	500 cal	1,662 cal/day
Faster loss	750 cal	1,412 cal/day

Recommended Targets by Current Weight

BMI Category	Recommended Weekly Loss	Deficit
Overweight (25-30)	0.25-0.5 kg	250-500 cal
Obese I (30-35)	0.5-0.75 kg	500-750 cal
Obese II-III (35+)	0.75-1.0 kg	750-1,000 cal

Higher starting weight can support larger deficits safely.

Minimum Calorie Guidelines

Never go below:

• Women: 1,200 calories/day
• Men: 1,500 calories/day

Below these levels:

• Nutritional deficiencies become likely
• Muscle loss increases dramatically
• Metabolism starts to slow
• Hormonal disruption occurs
• Sustainability drops significantly

If your calculated target is below these minimums, add exercise to increase TDEE instead.

Practical Calorie Targets by Profile

Woman (Sedentary, 60kg, 160cm, 30 years)

• TDEE: ~1,700 calories
• For 0.5kg/week loss: 1,200 calories (minimum)
• Better approach: Add exercise to increase TDEE

Woman (Active, 70kg, 165cm, 35 years)

• TDEE: ~2,200 calories
• For 0.5kg/week loss: 1,700 calories
• Sustainable and effective

Man (Sedentary, 85kg, 178cm, 40 years)

• TDEE: ~2,200 calories
• For 0.5kg/week loss: 1,700 calories
• Add walking to increase TDEE for faster results

Man (Active, 90kg, 180cm, 35 years)

• TDEE: ~2,900 calories
• For 0.5kg/week loss: 2,400 calories
• Comfortable deficit with room for good nutrition

Why Calorie Quality Matters

Not all calories are equal for satiety and health:

High Satiety (Eat More of These)

• Protein: Most filling, preserves muscle (eggs, chicken, fish, legumes)
• Fiber: Slows digestion, keeps you full (vegetables, fruits, whole grains)
• Whole Foods: More nutrients per calorie

Low Satiety (Limit These)

• Processed foods: Easy to overeat
• Liquid calories: Don't register as filling
• Refined carbs: Spike blood sugar, cause hunger

Example: 400 calories of chicken and vegetables keeps you full for 4+ hours. 400 calories of candy leaves you hungry in 30 minutes.

Tracking Your Intake

Methods

Food Apps: MyFitnessPal, Cronometer, LoseIt—log everything

Food Scale: Most accurate method

Portion Estimation: Less accurate but sustainable

Hand Portions: Palm = protein, fist = carbs, thumb = fat

Tips for Accuracy

• Weigh raw, not cooked
• Log cooking oils and sauces
• Don't forget drinks
• Be honest about portions
• Log BEFORE eating, not after

Common Mistakes

1. Eating Too Few Calories

Extreme restriction backfires:

• Muscle loss (bad for metabolism)
• Severe hunger (leads to binging)
• Nutritional deficiencies
• Hormonal issues
• Unsustainable

2. Not Adjusting Over Time

As you lose weight, your TDEE decreases. Recalculate every 5-10kg lost.

Example:

• At 80kg, TDEE might be 2,400
• At 70kg, TDEE drops to 2,200
• Same 1,700 calorie target now has smaller deficit

3. Underestimating Intake

Studies show people consistently underestimate calories by 30-50%. Use a food scale initially.

4. Overestimating Exercise Calories

"I burned 500 calories at the gym" → actual burn often 250-300. Gym machines overestimate.

5. Weekend Binges

Five days at 1,700 calories (1,500 deficit) + two days at 2,500 (0 deficit) = weekly deficit of only 1,500, not 3,000.

Adding Exercise

Exercise increases your TDEE, allowing you to:

• Eat more while still losing weight
• Create a deficit without extreme restriction
• Preserve muscle mass
• Improve health beyond weight loss

Calories Burned (Approx for 70kg Person)

Activity (30 min)	Calories
Walking (brisk)	140
Running	300
Cycling	250
Swimming	220
Weight training	150
HIIT	300

Use our Calorie Calculator to factor in exercise.

Sample Meal Plans

1,500 Calorie Day

Meal	Calories
Breakfast: Eggs (2) + toast + fruit	350
Lunch: Chicken salad + olive oil dressing	400
Snack: Greek yogurt + berries	150
Dinner: Salmon + vegetables + rice (small)	500
Snack: Nuts (small handful)	100

2,000 Calorie Day

Meal	Calories
Breakfast: Oatmeal + banana + peanut butter	450
Lunch: Chicken wrap + side salad	550
Snack: Apple + cheese	200
Dinner: Steak + potato + vegetables	650
Snack: Dark chocolate (small)	150

See our macro guide: How to Calculate Macros

Frequently Asked Questions

How fast should I lose weight?

0.5-1 kg per week is sustainable. Faster loss risks muscle loss and is harder to maintain.

Can I eat back exercise calories?

Partially. Eat back 50% of exercise calories. Full replenishment often leads to overeating.

Why am I not losing weight in a deficit?

Common reasons:

• Underestimating calorie intake
• Overestimating activity level
• Water retention masking fat loss
• Metabolic adaptation (recalculate TDEE)
• Inconsistent tracking

Should I do low-carb?

Carbs don't inherently cause weight gain. Total calories matter most. Low-carb works for some because protein and fat are more filling, not because carbs are magic.

How do I maintain after losing weight?

Slowly increase calories to new TDEE. The new you burns fewer calories than the old you. Maintenance is lifetime commitment.

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