Question 1

How do I calculate weight-loss percentage?

Accepted Answer

Subtract your current weight from your starting weight, divide that by your starting weight, and multiply by 100. For example, going from 200 to 185 lb is (15 ÷ 200) × 100 = 7.5%.

Question 2

What is a healthy rate of weight loss?

Accepted Answer

About 1–2 lb (0.5–1 kg) per week, or roughly 0.5–1% of your body weight, is the commonly recommended pace. Faster loss is more likely to cost you lean muscle and be harder to sustain.

Question 3

Why does losing 5–10% matter so much?

Accepted Answer

Studies behind the national obesity guidelines show that a 5–10% loss meaningfully lowers blood pressure, blood sugar, and cholesterol — real health gains well before you reach any 'ideal' weight.

Question 4

Is weight-loss percentage better than pounds lost?

Accepted Answer

It's a fairer comparison, because the same number of pounds represents a bigger change for a lighter person. Percentage is what fitness challenges and research use to compare people of different sizes.

Weight Loss Percentage Calculator — What % of Your Body Weight You've Lost (2026)