What is a calorie deficit?

A calorie deficit occurs when you consume fewer calories than your body burns in a day through basic metabolism and physical movement, forcing your body to burn stored fat for fuel.

How many calories do I need to cut to lose 1 pound of fat?

One pound of human body fat is approximately equivalent to 3,500 calories. A daily deficit of 500 calories per day results in roughly 1 pound (0.45 kg) of fat loss per week.

What is a safe minimum daily calorie intake?

Health authorities generally recommend not dropping below 1,200 calories per day for women and 1,500 calories per day for men without physician supervision to avoid nutrient deficiencies.

Why is high protein intake recommended during a calorie deficit?

Consuming adequate protein (1.6g to 2.2g per kg of bodyweight) helps preserve metabolically active lean muscle tissue and increases satiety during caloric restriction.

Is my personal health and weight data private?

Yes. All data calculations execute strictly inside your local web browser session and are never saved or transmitted.

Calorie Deficit Calculator (Weight Loss Target & Timeline)

Calculate your daily calorie deficit target and realistic timeline to reach your goal body weight.

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Age (Years)

Current Weight (kg)

Goal Weight (kg)

Height (cm)

Deficit Intensity / Pace

Weekly Activity Level

Maintenance (TDEE)

2,726 kcal/day

Target Daily Intake

2,226kcal/day

(-500 kcal deficit)

Estimated Timeline

~18 weeks

Suggested Daily Macronutrient Targets:

🥩 Protein (30%)

167g

🍚 Carbs (40%)

223g

🥑 Healthy Fats (30%)

74g

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About Calorie Deficit Calculator (Weight Loss Target & Timeline)

The Calorie Deficit Calculator creates an evidence-based roadmap to your goal body weight. By calculating your Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE) based on your gender, age, height, current weight, and activity level, this tool computes the exact daily caloric deficit required to lose 0.5 to 2 lbs per week safely without slowing down your metabolism.

How to use Calorie Deficit Calculator (Weight Loss Target & Timeline)

Enter Body Metrics: Input your biological gender, age, height, and current weight along with your target goal weight.
Select Activity & Pace: Choose your weekly physical exercise level and pick your desired fat loss pace (mild, moderate, or aggressive).
Review Calories & Macros: View your daily caloric target, estimated timeline in weeks, and recommended macronutrient balance.

Key features

Mifflin-St Jeor Formula: Employs the gold-standard clinical formula recommended by the American Dietetic Association.
Multiple Fat Loss Tiers: Choose between mild (250 kcal/day), moderate (500 kcal/day), or aggressive (750 kcal/day) deficit goals.
Goal Timeline Estimation: Calculates the realistic calendar date and number of weeks needed to reach your target weight.
Balanced Macronutrient Splits: Provides optimal daily protein, carbohydrate, and dietary fat gram targets to preserve lean muscle mass.

Frequently asked questions

What is a calorie deficit?: A calorie deficit occurs when you consume fewer calories than your body burns in a day through basic metabolism and physical movement, forcing your body to burn stored fat for fuel.
How many calories do I need to cut to lose 1 pound of fat?: One pound of human body fat is approximately equivalent to 3,500 calories. A daily deficit of 500 calories per day results in roughly 1 pound (0.45 kg) of fat loss per week.
What is a safe minimum daily calorie intake?: Health authorities generally recommend not dropping below 1,200 calories per day for women and 1,500 calories per day for men without physician supervision to avoid nutrient deficiencies.
Why is high protein intake recommended during a calorie deficit?: Consuming adequate protein (1.6g to 2.2g per kg of bodyweight) helps preserve metabolically active lean muscle tissue and increases satiety during caloric restriction.
Is my personal health and weight data private?: Yes. All data calculations execute strictly inside your local web browser session and are never saved or transmitted.