Work out weight loss rate instantly with clear inputs, formula shown and shareable results.
Loss rate is best judged as a percentage of body weight rather than in kilograms, because 0.7 kg a week is aggressive at 60 kg and conservative at 130 kg. 5.5 kg over eight weeks from 92 kg is 0.69 kg or 0.75% weekly - squarely inside the recommended 0.5-1% band, implying about a 756 kcal daily deficit.
Weekly rate
rate = (start - current) / weeks
Implied deficit
deficit = rate x 7700 / 7 kcal per day
These figures are population-average estimates, not a medical assessment or diagnosis. Body composition equations carry errors of several percentage points, and healthy ranges vary with age, ethnicity, muscularity and medical history. Discuss weight or body composition goals with a qualified clinician or dietitian.
Because faster loss increasingly comes from lean tissue and glycogen, and the associated deficits are hard to sustain without muscle loss and adherence failure.
Yes. The first week often shows 1-2 kg of glycogen and associated water, which is not fat and does not repeat.