Weight Loss Calculator Using BMR

Weight Loss Formula:

\[ \text{Deficit} = \text{BMR} \times \text{Activity Factor} - \text{Intake} \] \[ \text{Weight Loss} = \frac{\text{Deficit}}{7700} \]

BMR (kcal):

kcal/day

Activity Factor:

Daily Intake:

kcal/day

Time Period:

days

Calorie Deficit:

Estimated Weight Loss:

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1. What is a Weight Loss Calculator Using BMR?

Definition: This calculator estimates weight loss based on your Basal Metabolic Rate (BMR), activity level, and calorie intake.

Purpose: It helps individuals understand how calorie deficits translate to weight loss over time.

2. How Does the Calculator Work?

The calculator uses these formulas:

\[ \text{Daily Deficit} = \text{BMR} \times \text{Activity Factor} - \text{Intake} \] \[ \text{Weight Loss} = \frac{\text{Total Deficit}}{7700} \]

Where:

BMR — Basal Metabolic Rate (calories burned at rest)
Activity Factor — Multiplier for daily activity level (1.2-2.5)
Intake — Calories consumed per day
7700 — Calories needed to burn 1 kg of fat

3. Importance of Accurate Calculation

Details: Understanding your calorie deficit helps set realistic weight loss goals and maintain healthy progress.

4. Using the Calculator

Tips: Enter your BMR, select appropriate activity factor (1.2 sedentary to 2.5 extremely active), daily calorie intake, and time period.

5. Frequently Asked Questions (FAQ)

Q1: How do I find my BMR?
A: Use our BMR Calculator or the Mifflin-St Jeor formula based on your age, gender, weight and height.

Q2: What activity factor should I use?
A: 1.2 (sedentary), 1.375 (light activity), 1.55 (moderate), 1.725 (very active), 1.9-2.5 (extremely active).

Q3: Why 7700 calories per kg?
A: This is the approximate energy contained in 1 kg of body fat.

Q4: Is the weight loss estimate accurate?
A: It's an estimate - actual results vary based on metabolism, water retention, and other factors.

Q5: What's a safe calorie deficit?
A: Typically 500-1000 kcal/day for 0.5-1 kg/week loss. Consult a doctor for personalized advice.