Home Back

Water Fasting Weight Loss Calculator

Weight Loss Formula:

\[ \text{Loss (lb)} = \frac{\text{TDEE (cal/day)} \times \text{days (days)}}{3500} \]

cal/day
days

Unit Converter ▲

Unit Converter ▼

From: To:

1. What is Water Fasting Weight Loss Calculation?

Water fasting weight loss calculation estimates the amount of weight loss during a water fast based on your Total Daily Energy Expenditure (TDEE) and the duration of the fast. It provides an approximate measure of how much weight you might lose while consuming only water.

2. How Does the Calculator Work?

The calculator uses the weight loss formula:

\[ \text{Loss (lb)} = \frac{\text{TDEE (cal/day)} \times \text{days (days)}}{3500} \]

Where:

Explanation: The equation calculates estimated weight loss by determining the total calorie deficit during the fasting period and converting it to pounds.

3. Importance of Weight Loss Calculation

Details: Understanding potential weight loss during water fasting helps set realistic expectations and plan fasting periods appropriately. It's important to remember that actual results may vary based on individual metabolic factors.

4. Using the Calculator

Tips: Enter your TDEE in calories per day and the planned duration of your water fast in days. Both values must be positive numbers for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is TDEE and how do I calculate it?
A: TDEE (Total Daily Energy Expenditure) is the total number of calories you burn in a day, including basal metabolic rate and physical activity. You can use online TDEE calculators to estimate your value.

Q2: Is the weight loss calculation accurate for everyone?
A: This provides an estimate based on calorie math. Individual results may vary due to metabolic adaptations, water weight fluctuations, and other physiological factors during fasting.

Q3: How much weight can I expect to lose during water fasting?
A: Typically, you might lose 0.5-1 pound per day, but this varies based on your TDEE, starting weight, and individual metabolism.

Q4: Is water fasting safe for weight loss?
A: Water fasting should be approached with caution and preferably under medical supervision, especially for extended periods. It's not suitable for everyone.

Q5: Will I regain the weight after breaking the fast?
A: Some weight regain is normal as you reintroduce food and replenish glycogen stores and water weight. Long-term weight maintenance depends on sustainable eating habits post-fast.

Water Fasting Weight Loss Calculator© - All Rights Reserved 2025