Macros for 170 lb Men (Bulking, Lightly Active)
Reviewed by Andrew Menechian, Head of Fitness at FitCommit
Exact macros for a 170 lb man on a bulking diet. Calculated from estimated lean mass, Katch-McArdle BMR, and a lightly active TDEE (light exercise 1-3 days per week).
2,624
Calories
~10% calorie surplus
145g
Protein
580 cal (22%)
313g
Carbs
1252 cal (48%)
88g
Fat
792 cal (30%)
Running a 238 cal/day surplus (10% above TDEE). Expect ~0.48 lbs of weight gain per week, building on 139 lbs of lean mass.
4 weeks
171.9 lbs
8 weeks
173.8 lbs
12 weeks
175.8 lbs
How These Macros Were Calculated
| Body Weight | 170 lbs |
|---|---|
| Estimated Lean Mass | 139 lbs (82% of body weight) |
| Lean Mass (kg) | 63.2 kg |
| BMR (Katch-McArdle) | 1,735 cal/day |
| TDEE (BMR x 1.375) | 2,386 cal/day |
| Target Calories | 2,624 cal/day |
| Daily Surplus | 238 cal/day (10% surplus) |
| Expected Weekly Change | 0.48 lbs gain per week |
BMR uses the Katch-McArdle formula (370 + 21.6 x lean mass kg), which accounts for lean mass and outperforms Harris-Benedict for accuracy across different body compositions. Lean mass estimated at 18% average body fat for men. Activity multiplier 1.375 = light exercise 1-3 days per week.
Macro Breakdown
| Macro | Grams | Calories | % of Total |
|---|---|---|---|
| Protein | 145g | 580 | 22% |
| Carbohydrates | 313g | 1252 | 48% |
| Fat | 88g | 792 | 30% |
| Total | - | 2,624 | 100% |
Protein is set at 2.3g per kg of lean body mass (139 lbs lean mass for this man). Fat targets 30% of target calories with a minimum safety floor applied if needed; carbs fill remaining calories, with a 50g minimum for brain function.
Meal Split Examples
3 Meals Per Day
- Per-meal calories875 cal
- Per-meal protein48g
- Per-meal carbs104g
- Per-meal fat29g
4 Meals Per Day
- Per-meal calories656 cal
- Per-meal protein36g
- Per-meal carbs78g
- Per-meal fat22g
5 Meals Per Day
- Per-meal calories525 cal
- Per-meal protein29g
- Per-meal carbs63g
- Per-meal fat18g
Research shows muscle protein synthesis is maximized with 30-40g protein per meal. 48g per meal in 3 meals is within the optimal range.
What These Macros Look Like in Food
Protein: 145g
- 5 x 100g chicken breast (31g each)
- 24 large eggs (6g each)
- 9 cups whole-milk Greek yogurt (17g each)
- 6 scoops protein powder (22-25g each)
Carbs: 313g
- 7 cups cooked rice (45g each)
- 6 cups dry oats (54g each)
- 12 medium sweet potatoes (26g each)
- 12 medium bananas (27g each)
Fat: 88g
- 6 tbsp olive oil (14g each)
- 6 half avocados (15g each)
- 11 tbsp peanut butter (8g fat each)
- 6 oz almonds (14g each)
These are rough equivalents. Most meals contain a mix of all three macros. Use a food tracking app for precise logging.
These numbers use an estimated 18% body fat.
FitCommit measures your actual lean mass with an AI body scan from your phone camera, so your macros reflect your real body composition.
Frequently Asked Questions
How long should I stay in a bulking phase at 2624 calories?
Lean bulks typically run 12-20 weeks. At 2624 calories, expect gradual muscle gain with minimal fat. When body fat feels high (above 18-20% for men, 28-30% for women), transition to maintenance or a cut.
Should I eat more on training days at 2624 calories?
Cycling calories is not necessary for most people. Hitting your daily target consistently produces better results than complex cycling protocols. If you want to cycle, shift 10-15% of daily calories from rest days to training days while keeping the weekly total the same. For example, add 262 calories on training days and subtract 262 on rest days. Your weekly calorie total stays fixed.
How were the macros calculated for a 170 lb male?
The calculation uses the Katch-McArdle BMR formula. A 170 lb man with an estimated 82% lean mass (139 lbs lean) has a BMR of 1735 calories. Multiplied by 1.375 for lightly active activity (Light exercise 1-3 days per week), the TDEE is 2386 calories per day. For bulking, a 10% surplus brings the target to 2624 calories.
Why is protein 145g for bulking at 170 lbs?
Protein for bulking is set at 2.3g per kg of lean body mass. A 170 lb man with 139 lbs of lean mass needs 145g of protein per day. During a bulk, 2.3g per kg of lean mass supports muscle protein synthesis without excess calories from protein.
When to Recalculate These Macros
Not gaining weight after 2 consistent weeks
Add 100-150 cal/day from carbs. Your TDEE may be higher than the 1.375x estimate. Confirm you are tracking consistently before increasing further.
Gaining more than 1 lb per week
Reduce by 100-150 cal/day. Muscle growth rate is limited by biology. Excess surplus above that ceiling goes to fat. Target 0.25-0.5 lbs per week for a lean bulk.
Gained 10 or more lbs from this starting weight
Recalculate at your new weight. Higher mass means higher TDEE, so the same surplus percentage shrinks over time without adjustments.
Other Weights and Goals
Same Weight and Goal, Different Activity Levels
Sedentary
170 lbs, male, bulking
Lightly Active
170 lbs, male, bulking
Moderately Active
170 lbs, male, bulking
Very Active
170 lbs, male, bulking
Extra Active
170 lbs, male, bulking
Related Resources
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These numbers use average body fat estimates. FitCommit's AI body scan measures your actual lean mass from your phone camera.
Precise lean mass = precise TDEE = macros that actually match your body, not an average.
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