Weight Loss Percentage Calculator

How to Calculate Weight Loss Percentage

Weight Loss Percentage is a valuable metric for tracking your progress in a weight loss journey. It provides a relative measure of how much weight you've lost compared to your starting weight.

Weight Loss Percentage Formula

The formula for calculating Weight Loss Percentage is:

$$Weight Loss Percentage = \frac{Initial Weight - Current Weight}{Initial Weight} \times 100\%$$

Where:

• Initial Weight is your starting weight before beginning your weight loss journey
• Current Weight is your weight at the time of calculation

Calculation Steps

1. Record your initial weight before starting your weight loss program
2. Measure your current weight
3. Subtract your current weight from your initial weight to get the weight loss
4. Divide the weight loss by your initial weight
5. Multiply the result by 100 to get the percentage

Example Calculation

Let's calculate the Weight Loss Percentage for someone who started at 90 kg and now weighs 80 kg.

Step 1: Calculate Weight Loss

$$\begin{align} Weight Loss &= Initial Weight - Current Weight \\ &= 90 kg - 80 kg \\ &= 10 kg \end{align}$$

Step 2: Apply the Weight Loss Percentage Formula

$$\begin{align} Weight Loss Percentage &= \frac{Weight Loss}{Initial Weight} \times 100\% \\ &= \frac{10 kg}{90 kg} \times 100\% \\ &= 0.1111 \times 100\% \\ &= 11.11\% \end{align}$$

Therefore, this person has lost 11.11% of their initial body weight.

Interpreting Weight Loss Percentage

Weight Loss Percentage helps you understand your progress relative to your starting point. Here's a general interpretation:

• 0-5%: Minor weight loss
• 5-10%: Moderate weight loss, potentially yielding health benefits
• 10-20%: Significant weight loss, likely to result in noticeable health improvements
• >20%: Major weight loss, consult with a healthcare professional to ensure it's healthy and sustainable

Remember, healthy and sustainable weight loss is typically 1-2% of body weight per week.

Visual Representation

This bar chart visually represents the example calculation, showing the initial weight, current weight, and the amount of weight lost. The percentage (11.11%) represents the proportion of initial body weight that was lost.