Set a calorie target per meal.
A per-meal target is derived from the day, not the other way round. Start from maintenance calories, convert the desired weekly weight change into a daily energy adjustment using roughly 7,700 kcal per kilogram of body tissue, then divide the resulting daily goal by the number of meals. A 1,200 kcal daily floor is enforced, so an aggressive weekly target is clipped rather than producing a goal that cannot meet micronutrient needs — the applied adjustment shows what the calculation actually used.
Daily goal
Daily goal = maintenance - (weekly kg x 7700 / 7), floored at 1200 kcal
Per meal
Per-meal target = daily goal / meals per day
These figures are population-average estimates for general planning only and are not medical or dietetic advice. Individual energy and nutrient needs vary widely with body composition, activity, medication and health status. Consult a qualified health professional or registered dietitian before making significant changes to what you eat, and especially if you are pregnant or breastfeeding, are under 18, or have a medical condition or a history of disordered eating.
No, it is a planning approximation. Actual loss per unit deficit slows as weight falls and as the body adapts, so treat the first four weeks as a calibration period and adjust from measured results.
Below roughly that level it becomes difficult to meet protein and micronutrient needs from food alone. If the weekly target you entered requires going lower, the calculation clips it and shows the smaller adjustment it actually applied.
Yes. The even split is the default because it is easiest to hold to; shifting calories towards the meals around training is fine as long as the daily goal is unchanged.