Home Back

100 Lb Weight Loss Calculator

Weight Loss Equation:

\[ Time = \frac{100 \times 3500}{Daily\ Deficit} \]

kcal/day

Unit Converter ▲

Unit Converter ▼

From: To:

1. What is the 100 Lb Weight Loss Calculator?

This calculator estimates the time required to lose 100 pounds based on your daily caloric deficit. It uses the fundamental principle that 1 pound of fat equals approximately 3500 calories.

2. How Does the Calculator Work?

The calculator uses the weight loss equation:

\[ Time = \frac{100 \times 3500}{Daily\ Deficit} \]

Where:

Explanation: The equation calculates how many days it will take to burn 350,000 calories (100 lbs × 3500 kcal/lb) at your specified daily deficit.

3. Importance of Caloric Deficit

Details: Creating a consistent caloric deficit is the foundation of weight loss. This calculator helps set realistic expectations for significant weight loss goals.

4. Using the Calculator

Tips: Enter your daily caloric deficit (typically between 300-1000 kcal/day for sustainable weight loss). Values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Is 100 lbs a realistic weight loss goal?
A: For many people, yes, but it should be approached gradually over many months with medical supervision if needed.

Q2: What's a safe daily caloric deficit?
A: Typically 500-1000 kcal/day for 1-2 lbs/week loss. Extreme deficits can be counterproductive.

Q3: Why 3500 calories per pound?
A: This is the estimated energy content in one pound of body fat, though individual variations exist.

Q4: Will the time estimate be exact?
A: No, this is a theoretical calculation. Actual results vary based on metabolism changes, activity levels, and body composition.

Q5: Should I use the maximum possible deficit?
A: Not recommended. Very large deficits can lead to muscle loss, metabolic adaptation, and nutritional deficiencies.

100 Lb Weight Loss Calculator© - All Rights Reserved 2025