Maintenance Macros for a 180 lb Male (High Protein)

A 180 lb man at moderate activity needs approximately 2765 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 180 lb, a daily target of 189gm of protein (1.05g 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 2765 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.

Spreading 189gm across 3–5 meals maximizes muscle protein synthesis compared to front-loading or back-loading protein in 1–2 large servings. A practical starting structure: ~51gm at breakfast, ~51gm at lunch, ~62gm at dinner, and ~25gm from a snack. High-protein foods like chicken breast (31gm/100g), Greek yogurt (10gm/100g), eggs (6gm each), and cottage cheese (11gm/100g) make the target achievable without supplements.

Adjust when your body sends a clear signal for 2–3 consecutive weeks: no scale trend movement (up or down as intended), stalled training performance, or persistent energy issues. A single bad week is noise — a consistent 3-week trend is a signal. Adjust in 100–150 calorie increments, not large jumps. At 2765 calories for a 180 lb man, a 100-calorie change represents about 4–5% of total intake — meaningful but not disruptive to your food structure.