Weight Loss Calculator
Track weight change, percent loss, weekly pace and goal progress from your starting and current weight.
Hit Calculate to see your progress zone
Calculate to compare with goal
Metrics appear after calculation
Your explanation appears here
Hydration, sodium, digestion, menstrual cycle and training soreness can shift scale weight day to day.
Your plan appears after calculation
Test a new current weight or weekly rate without changing your main result.
Calculate your baseline first
Weight variation is calculated as (start weight − current weight) ÷ start weight × 100. Positive values mean weight loss; negative values mean weight gain.
Many adults use about 0.5% to 1% of body weight per week as a practical range. Faster loss can be appropriate in some contexts, but it may increase fatigue, hunger and lean-mass loss risk.
The tool converts weight change into an approximate energy equivalent using the common estimate of 7,700 kcal per kilogram of body weight change. It is only an estimate because water, glycogen and body composition changes affect the scale.
Results are estimates generated locally in your browser for informational purposes only. This calculator does not diagnose health status or replace medical, nutritional or eating-disorder care. Weight changes can reflect water, glycogen, muscle and digestive contents, not just fat. Seek qualified professional guidance for pregnancy, minors, medical conditions, rapid weight loss, or persistent fatigue.
