You can figure out how much weight you’ve lost with a couple of simple numbers: your starting weight and your current weight.

Quick answer

  1. Write down:
    • Your past (starting) weight.
    • Your current weight.
  2. Subtract:
    weight lost=past weight−current weight\text{weight lost}=\text{past weight}-\text{current weight}weight lost=past weight−current weight.
  1. To get the percentage lost, use:
    weight loss percentage=past weight−current weightpast weight×100\text{weight loss percentage}=\dfrac{\text{past weight}-\text{current weight}}{\text{past weight}}\times 100weight loss percentage=past weightpast weight−current weight​×100.

Mini example (walk‑through)

Imagine you started at 200 lb and now you’re 180 lb:

  • Weight lost: 200−180=20200-180=20200−180=20 lb.
  • Percentage lost: (200−180)/200×100=10%(200-180)/200\times 100=10%(200−180)/200×100=10%.

So you’ve lost 20 lb, which is 10% of your body weight.

Why the percentage matters

  • It shows progress fairly across different body sizes, because 10 lb means different things at 120 lb vs 250 lb.
  • Health experts note that losing even around 5% of body weight can already improve markers for conditions like diabetes and heart disease risk.

Quick HTML table you can reuse

You can plug in your own numbers (replace PAST and CURRENT):

html

<table>
  <tr>
    <th>Item</th>
    <th>Value</th>
  </tr>
  <tr>
    <td>Past weight</td>
    <td>PAST</td>
  </tr>
  <tr>
    <td>Current weight</td>
    <td>CURRENT</td>
  </tr>
  <tr>
    <td>Weight lost</td>
    <td>PAST − CURRENT</td>
  </tr>
  <tr>
    <td>Weight loss %</td>
    <td>((PAST − CURRENT) / PAST) × 100</td>
  </tr>
</table>

If you want to sanity‑check your result

Many online “weight loss percentage calculators” let you type in starting and current weight and will show:

  • Pounds or kg lost.
  • Percentage of body weight lost.

Bottom note: Information gathered from public forums or data available on the internet and portrayed here.