Weight Loss Percentage Calculator
Calculate the percentage of body weight you have lost — a more meaningful progress indicator than absolute kilograms.
What is Weight Loss Percentage?
Percentage weight loss normalises progress across people of different starting weights. A 10 kg drop is more impressive for a 70 kg person than for a 130 kg person, and percent loss captures that. Clinically, a 5–10% drop produces meaningful improvements in blood pressure, glucose and lipid markers.
How is it calculated?
%Loss = (Starting Weight − Current Weight) / Starting Weight × 100. Use the same units for both fields. The result is unit-agnostic.
Frequently Asked Questions
- What is a healthy rate?
- 0.5–1% of body weight per week is generally considered safe.
- Why use percentage?
- It enables fair comparisons across people and over long periods.
- How fast is too fast?
- Sustained losses above 1.5%/week risk lean-tissue loss and gallstones.