The Ultimate Calorie to Pounds Weight Loss Calculator (Scientifically Adjusted)

Estimate a personalized daily calorie target, weight-loss pace, and practical protein, fat, and carbohydrate ranges using your body measurements and goal.

🔥 The Ultimate Calorie to Pounds Weight Loss Calculator (Scientifically Adjusted)

Estimate a personalized daily calorie target, weight-loss pace, and practical protein, fat, and carbohydrate ranges using your body measurements and goal.

Your essentials

Start with five inputs. Nothing entered here leaves your browser.

Age

Adults aged 18 to 100

Please enter an age from 18 to 100.

Gender / sex used by the formula

Mifflin-St Jeor uses a sex-specific constant

Height in centimetres

For example, 165 cm

Please enter a height from 120 to 230 cm.

Weight in kilograms

For example, 75 kg

Please enter a weight from 35 to 300 kg.

Weekly weight-loss goal

A slower target is generally easier to sustain

Interactive Visualization

Estimated Output

Scale max

— Waiting for input

Enter your values to calculate an estimate.

Uses your browser's print-to-PDF feature. Your entries stay on this device.

Method: Mifflin-St Jeor BMR × activity factor − goal deficit
Macros are planning estimates based on calorie target, body weight, optional body-fat percentage, and preference.

*Conversion calculations are based on thermodynamic body weight modeling. Adjust targets based on actual physical feedback.

❓ Frequently Asked Questions

How many calories do I need to burn to lose 1 pound?

You need a deficit of approximately 3,500 calories to lose 1 pound of body fat. This can come from eating less, exercising more, or a combination of both. A daily deficit of 500 calories leads to about 1 pound lost per week.

Is the 3,500 calories per pound rule accurate?

It's a useful estimate, but individual results vary based on metabolism, body composition, and hormone levels. Some people lose faster, others slower. Use this calculator as a guideline, not a guarantee.

Can I lose 2 pounds per week safely?

A 1,000 calorie daily deficit (7,000 per week) typically results in 2 pounds lost per week. Most health experts consider this the maximum safe rate. Faster loss may lead to muscle loss and nutrient deficiencies.

What is a healthy daily calorie deficit?

For most adults, a 300-500 calorie daily deficit is sustainable and healthy. This leads to 0.5-1 pound lost per week. Very low calorie diets (under 1,200 calories for women, 1,500 for men) should only be done under medical supervision.

🔗 Related Weight Loss Calculators

Weekly Calculator Monthly Calculator Daily Calculator Exercise Calculator Walking Calculator Running Calculator

칼로리와 체지방 뒤에 숨은 과학

Wishnofsky의 법칙과 열역학 제1법칙

체중 변화는 생물학적 에너지 균형에 의해 결정됩니다. Wishnofsky의 법칙에 따르면 대략 3,500칼로리의 에너지 부족 또는 과잉은 저장된 지방 조직(체지방) 1파운드에 해당합니다. 이는 열역학 제1법칙을 적용한 것입니다. 에너지는 생성되거나 파괴될 수 없으며, 대사 작업을 위해 지방으로 저장되거나 연소될 뿐입니다.

Interactive Calorie Energy and Body-Mass Equivalent

Adjust the slider to compare calorie energy with the historical static body-fat equivalent; kilograms and kilocalories remain separate conservation units.

⚡ Energy

⚖️ Mass

3,500 kcal

Energy In

1.00 lbs

Fat Stored

Select Energy Input (kcal)

0 kcal 7,000 kcal 14,000 kcal

Adipose

Static Energy-Equivalent Model

In the historical static model, 3,500 kcal represents an estimated one-pound energy equivalent, not an exact biological outcome.

📉 칼로리 부족과 과잉의 이해

체중을 감량하려면 섭취량이 일일 총 에너지 소비량(TDEE)보다 낮은 칼로리 부족(음의 에너지 균형)을 만들어야 합니다. 반대로 근육을 키우거나 체중을 늘리려면 잉여 칼로리(양의 에너지 균형)가 필요합니다. 당사의 변환기는 이러한 에너지 목표를 체질량 파운드로 직접 매핑하는 데 도움이 됩니다.

Core Biological Entities Defined

✔ Adipose Tissue: The anatomical term for body fat, which stores chemical energy.
✔ TDEE: Total Daily Energy Expenditure represents the total calories burned in 24 hours.
✔ Wishnofsky's Rule: The historical approximation that treats 3,500 kcal as a one-pound energy equivalent, not a guaranteed tissue change.

Interactive Calorie Balance Visualizer

Adjust your TDEE and daily intake to visualize calorie balance states and the physiological processes involved.

Your TDEE (Maintenance) 2,000 kcal

1,500 kcal 4,000 kcal

Daily Calorie Intake 1,500 kcal

500 kcal 5,000 kcal

Current State

Calorie Deficit

Lipolysis (Fat Loss)

Your calorie intake is below your TDEE. Your body metabolizes stored triglyceride lipids from adipose tissue to satisfy its energy needs.

Net Energy Change

-500 kcal/day

Weekly Mass Change

-1.00 lbs

Interactive Weight Loss Timeline

Select a target weight and daily calorie deficit to map your progress milestones along a biological timeline.

Target Weight:

Planned Daily Calorie Deficit 500 kcal / day

200 kcal 1,500 kcal (Advanced)

Total Deficit Required

35,000 kcal

Days to Achieve

70 Days

Expected Target Date

September 5, 2026

Start Day 0

Halfway Day 35

Goal Day 70