How Many Calories Should I Eat to Gain Muscle and Lose Fat?

Introduction

To gain muscle while losing fat, eat at a modest calorie surplus of roughly 10–20 % above maintenance with a high protein intake of 1.6–2.2 g per kg of body weight, train with progressive overload, and time nutrients around workouts. This article walks you through calculating your exact calorie target, setting protein doses, choosing pre‑workout fuel, and timing creatine for maximal recomposition.

You’ll learn a step‑by‑step cheat sheet for baseline energy needs, specific formulas for a 150‑lb lifter and for women, post‑workout protein targets, the best pre‑workout snacks (including vegetarian options), creatine timing guidance, and a weekly audit to confirm you’re building muscle while shedding fat.

Step 1 Baseline Cheat‑Sheet: Calculating BMR and Total Daily Energy Expenditure

1. Estimate Basal Metabolic Rate (BMR) – Use the Mifflin‑St Jeor equation, which is the most validated for healthy adults.[^1]

- Men: 10 × weight (kg) + 6.25 × height (cm) – 5 × age (y) + 5

- Women: 10 × weight (kg) + 6.25 × height (cm) – 5 × age (y) – 161

1. Apply an activity multiplier to get Total Daily Energy Expenditure (TDEE):

- Sedentary (little/no exercise): BMR × 1.2

- Light (1‑3 days/week): BMR × 1.375

- Moderate (3‑5 days/week): BMR × 1.55

- Hard (6‑7 days/week): BMR × 1.725

- Athlete (twice daily): BMR × 1.9

1. Set your recomposition target – Add 10‑20 % to TDEE for a lean bulk, or stay at TDEE if you prefer a true body‑recomposition approach.

[^1]: Mifflin‑St Jeor equation validation

How Many Calories Should I Eat to Gain Muscle at 150 Pounds? Step‑by‑Step Formula

Assume a 30‑year‑old male, 5 ft 9 in (175 cm), 150 lb (68 kg), training 4 days/week (moderate).

1. BMR = 10 × 68 + 6.25 × 175 – 5 × 30 + 5 = 1,665 kcal.
2. TDEE = 1,665 × 1.55 ≈ 2,580 kcal.
3. Lean‑bulk target = 2,580 × 1.15 ≈ 2,970 kcal (≈ 3,000 kcal).
4. Protein goal = 2 g/kg × 68 kg = 136 g (≈ 540 kcal).
5. Fat = 0.8‑1 g/kg → 55‑68 g (≈ 500‑610 kcal).
6. Carbohydrates fill the remainder: 3,000 – (540 + 550) ≈ 1,910 kcal → ≈ 475 g.

Adjust up or down 100‑200 kcal weekly based on scale trend and strength gains. You can also use our calorie calculator to automate these numbers.

How Many Calories Should I Eat to Gain Muscle as a Woman? Adjustments Cheat‑Sheet

Women typically carry less lean mass and have a lower absolute BMR, so the surplus can be smaller.

Calculate BMR/TDEE using the female Mifflin‑St Jeor formula.

Apply a 5‑10 % surplus instead of 10‑20 % (e.g., TDEE × 1.07).

Protein target remains 1.6‑2.2 g/kg; for a 60 kg woman that’s 96‑132 g.

Fat at 0.9‑1 g/kg supports hormonal health.

Monitor menstrual cycle; a slight calorie dip during luteal phase can improve adherence without harming muscle accrual.

Research suggests female responders achieve similar relative hypertrophy when protein and training volume are matched.[^2]

[^2]: ISSN position stand on protein

How Many Grams of Protein After Workout to Build Muscle? Post‑Gym Macro Checklist

Target per serving: 0.3‑0.5 g/kg body weight (≈ 20‑40 g for most adults) within 2 h post‑exercise.

Total daily protein: 1.6‑2.2 g/kg (e.g., 110‑150 g for a 70 kg lifter).

Distribution: 3‑5 meals spaced 3‑4 h apart; each meal hits the 0.3‑0.5 g/kg window.

Leucine threshold: Aim for ≥ 2.5 g leucine per serving (≈ 25‑30 g whey or 150 g chicken).

If you miss the window, total daily intake matters more than exact timing.[^3]

[^3]: ACSM nutrition position stand

Pre‑Workout Fuel Cheat‑Sheet: Best Snacks and Vegetarian Meals for Muscle Gain

Timing: 60‑90 min before training for solid meals; 30‑45 min for liquid/snack.

Quick snacks (≈ 200‑300 kcal, 20‑30 g carbs, 10‑15 g protein)

Greek yogurt (170 g) + 1 tbsp honey + 10 g almonds

Banana + 1  scoop whey (or plant protein) blended with water

Rice cakes (2) topped with 2 tbsp peanut butter + sliced strawberries

Vegetarian pre‑workout meal (≈ 400‑500 kcal)

1 cup cooked quinoa + ½ cup black beans + 1 cup roasted veg + 1 tbsp olive oil

Tofu stir‑fry (150 g) with brown rice (1 cup) and mixed peppers

Lentil‑sweet potato bowl: ¾ cup lentils, ½ cup mashed sweet potato, spinach, tahini drizzle

Key macros: 1‑1.5 g carbs/kg, 0.3‑0.4 g protein/kg, low fat (< 10 g) to speed gastric emptying. For a full day of eating, try our meal planner.

Creatine Timing Cheat‑Sheet: When to Take Creatine for Muscle Gain

Daily dose: 3‑5 g creatine monohydrate (no loading required).

Evidence: Post‑workout ingestion shows a slight edge for muscle saturation, but pre‑workout or any consistent time yields similar long‑term gains.[^4]

Practical rule: Take it with your post‑workout shake or meal for convenience; if you train fasted, take it with breakfast.

Brain health: Same 3‑5 g daily supports cognitive function; timing is irrelevant.[^5]

[^4]: ISSN creatine position stand

[^5]: NIH creatine fact sheet

Weekly Progress Audit Checklist: 5 Metrics to Confirm You Are Gaining Muscle While Losing Fat

1. Body weight trend – Aim for +0.25‑0.5 % per week (slow gain) or stable weight with composition shift.
2. Waist/hip circumference – Waist ↓ 0.5‑1 cm weekly indicates fat loss.
3. Strength performance – 2‑5 % load increase on key lifts (squat, bench, deadlift) per month.
4. Progress photos – Same lighting, pose, weekly; visual muscle fullness vs. leanness.
5. Body‑fat estimate – Skinfold, bioimpedance, or DEXA every 4‑6 weeks; target ↓ 0.5‑1 % body‑fat while lean mass ↑.

If ≥ 3 of 5 metrics move favorably, keep calories; if stalled, adjust ± 100 kcal or add a training session. Track body fat easily with our body fat calculator.

Conclusion

Calculate your BMR, apply the right activity multiplier, and add a modest surplus (5‑20 % depending on sex and goal). Hit 1.6‑2.2 g/kg protein daily, with 0.3‑0.5 g/kg post‑workout. Fuel 60‑90 min pre‑training with a carb‑protein snack (vegetarian options work equally well). Take 3‑5 g creatine daily—post‑workout is convenient but not mandatory. Track the five weekly metrics to verify true recomposition and tweak calories in 100‑kcal steps. Consistency across these checkpoints drives simultaneous muscle gain and fat loss.