Weight Loss Percentage Calculator

Enter your starting and current weight to calculate how much weight you've lost as a percentage of your starting weight.

Examples

Example 1:

Starting: 200 lbs | Current: 180 lbs

(200 − 180) ÷ 200 = 0.1 × 100 = 10%

Example 2:

Starting: 150 kg | Current: 135 kg

(150 − 135) ÷ 150 × 100 = 10%

Example 3:

Starting: 100 | Current: 100

No weight loss: 0%

Frequently Asked Questions

Can I use pounds or kilograms?

Yes — just be consistent. The calculator works with any unit of weight as long as both values use the same one.

Can I use decimals?

Yes, decimals are supported for more accurate results.

What if I gained weight?

The result will be negative, meaning your current weight is higher than your starting weight.