Keto Macros for Weight Loss

Keto supports weight loss through two mechanisms: a calorie deficit and reduced insulin from near-zero carbohydrate intake. The ketogenic state encourages the body to oxidise stored fat for fuel rather than dietary glucose, which can accelerate fat loss relative to a calorie-matched standard diet — particularly in the first 8–12 weeks. The calculator above lets you set a 500 kcal deficit (roughly −0.5 kg/week) or 1,000 kcal deficit (roughly −1 kg/week). A deficit larger than 1,000 kcal is not recommended because it increases muscle loss and is difficult to sustain. Protein at 1.6 g/kg body weight is the most important lever: at a deficit, adequate protein prevents the body from breaking down lean tissue for energy. Fat is not unlimited on keto — it fills the remaining calories, not an uncapped amount. People who stall after the first month should check total calorie intake, not just carbs, and consider re-running the calculator with their updated weight.