How it's calculated
% change = (start − current) ÷ start × 100
start = starting weight, current = current weight. A positive result is weight lost, negative is weight gained.
Common questions
How do I calculate weight loss percentage?
Subtract current from starting weight, divide by starting weight, and multiply by 100. Losing 15 lb from 200 lb is 7.5%.
Is a 5% weight loss meaningful?
Yes. Losing 5% of body weight is enough to improve blood pressure, blood sugar, and cholesterol for many people.