How it works
percent lost = (start − current) ÷ start × 100pounds lost = start − current
- start
- your starting weight in pounds
- current
- your weight now in pounds
- percent lost
- the share of your body weight gone
This is a plain arithmetic tool, not health advice. Losing roughly 1 to 2% of body weight per week is a common general guideline, but the right pace depends on the person, so treat any target as a conversation for you and a clinician.
Frequently asked questions
What percent is 20 lb off a 200 lb start?
10%. You divide 20 by 200.
How do I calculate weight loss percentage?
Subtract your current weight from your starting weight, divide by the starting weight, and multiply by 100.
Is losing weight as a percent better than pounds?
A percent lets you compare progress across different starting weights, since the same 10 lb is a bigger share for a lighter person.
What if I gained weight?
The result turns negative, which just means your current weight is above where you started.