How this calculator works
This is a macronutrient budget, not a therapeutic ketogenic diet. Carbohydrate and protein grams are user choices; fat fills the remaining energy. The 50 g comparison reflects a common research definition and cannot confirm ketosis. People taking glucose-lowering medicines or seeking a clinical ketogenic diet need individual supervision. An optional goal adds a user-entered energy adjustment and schedules a date using the entered weekly pace. The pace and calorie adjustment are independent assumptions. The date is arithmetic, not a prediction: metabolism, water and tissue composition change over time. No fixed kcal-per-kg rule is used. The result is an estimate for information only and is not medical advice.
Formula
Fat grams = [daily kcal - 4 x carbohydrate grams - 4 x protein grams] / 9. Fat energy fraction = remaining fat kcal / total kcal.
Worked example
At 2520.17 kcal, 25 g carbohydrate and 100 g protein leave 2020.17 kcal for fat, or 224.463333 g fat.
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Frequently asked questions
Are these net carbs?
The input is total carbohydrate. Net-carb conventions differ and should not be mixed with a total-carbohydrate research threshold.
Will this guarantee ketosis?
No. Ketosis varies with intake, activity and metabolism, and cannot be inferred from a budget alone.
Is a keto diet appropriate for everyone?
No. Medical conditions, medicines, pregnancy and nutritional needs can change its safety and suitability.