Maintenance Macros for a 150 lb Female (Balanced)

A 150 lb woman at moderate activity needs approximately 2152 calories per day to maintain bodyweight. This estimate comes from the Mifflin-St Jeor equation applied at a moderate activity multiplier (1.55). Your real maintenance may be 100–150 calories above or below this depending on individual metabolism and true daily activity — track your scale trend for 2 weeks to confirm.

At 150 lb, a daily target of 127gm of protein (0.85g per lb bodyweight) supports body composition goals whether cutting, building, or maintaining. Protein has a higher thermic effect than carbs or fats, keeps hunger lower than either, and directly determines how much muscle your body can build or retain. Distribute across 3–5 meals for best use — a single large protein serving has diminishing returns compared to spread intake.

If your scale weight is stable within 1–2 lbs over 3+ weeks at 2152 calories, you have found your maintenance. If weight trends downward consistently, add 100–150 calories. If it trends upward, reduce by 100–150 calories. Formulas like Mifflin-St Jeor give a close estimate, but actual maintenance is individual and can vary ±10% from calculated values based on NEAT (non-exercise activity thermogenesis) and metabolic rate differences.

A balanced split at 150 lb is a strong default choice — it provides enough carbs for training fuel, adequate fat for hormone function, and a solid protein floor at 127gm/day without restricting any macro aggressively. It is particularly well-suited for people who do not want to follow a specific dietary protocol (keto, carnivore) and prefer food flexibility over a rigid structure. The main tradeoff is that it requires more active tracking than simplified approaches, since no food group is off-limits.

At 150 lb, total calorie targets are lower, which means every macro gram matters more. Protein is the priority to protect — at 127gm, you are targeting 0.85g per lb, which leaves little room to reduce protein without consequences for muscle retention. If you need to reduce total calories, trim from carbs or fats, not protein. The lower absolute calorie target also means tracking accuracy is more important: a 200-calorie tracking error represents a larger percentage of total intake at 2152 calories than it would at 2,800+.