Weight Loss Percentage Calculator
Percent of body weight lost.
Enter your values
ⓘ Live results
Results
- Percentage lost
- 8.95%
- Weight lost
- 8.5 kg
- Remaining to goal
- 8.5 kg
- Progress to goal
- 50%
- Clinically meaningful (5%)?
- Yes
Quick answer
Weight loss percentage is pounds or kilos lost divided by starting weight — a 5% loss already improves health markers.
% lost = (Start − Current) ÷ Start × 100
How to use the Weight Loss Percentage Calculator
- 1Enter your starting weight.
- 2Enter your current weight.
- 3Add your goal to track progress.
Worked example
Using the values the calculator loads with:
Inputs
- Starting weight95 kg
- Current weight86.5 kg
- Goal weight78 kg
Results
- Percentage lost8.95%
- Weight lost8.5 kg
- Remaining to goal8.5 kg
- Progress to goal50%
- Clinically meaningful (5%)?Yes
Frequently asked questions
Why does 5% matter?
A 5% loss meaningfully improves blood pressure, glucose and lipids.
How fast is safe?
0.5–1% of body weight per week is the usual recommendation.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.