Weight Loss Percentage Calculator

Find the percentage of body weight lost.

Weight lost (%) 10

Amount lost 9

Formula: percent = (start − current) ÷ start × 100

Step-by-step with your numbers:

1. Values used:

2. Starting weight = 90

3. Current weight = 81

5. Weight lost = 10%

6. Amount lost = Starting weight - Current weight = 90 - 81 = 9

Did we solve your problem today?

Track progress as a percentage of your starting weight.

The math behind it

weight loss % = (starting − current) ÷ starting × 100.

90 → 81 kg → 10%.

Healthy rate?

About 0.5–1% of body weight per week is sustainable.