Macros for 170 lb Men (Cutting, Sedentary)
Reviewed by Andrew Menechian, Head of Fitness at FitCommit
Exact macros for a 170 lb man on a cutting diet. Calculated from estimated lean mass, Katch-McArdle BMR, and a sedentary TDEE (desk job, little or no exercise).
1,665
Calories
~20% calorie deficit
164g
Protein
656 cal (40%)
97g
Carbs
388 cal (23%)
69g
Fat
621 cal (37%)
Running a 417 cal/day deficit (20% below TDEE). Expect ~0.83 lbs of fat loss per week while protecting 139 lbs of lean mass.
4 weeks
166.7 lbs
8 weeks
163.4 lbs
12 weeks
160 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 1.2) | 2,082 cal/day |
| Target Calories | 1,665 cal/day |
| Daily Deficit | 417 cal/day (20% deficit) |
| Expected Weekly Change | 0.83 lbs loss 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 1.2 = desk job, little or no exercise.
Macro Breakdown
| Macro | Grams | Calories | % of Total |
|---|---|---|---|
| Protein | 164g | 656 | 40% |
| Carbohydrates | 97g | 388 | 23% |
| Fat | 69g | 621 | 37% |
| Total | - | 1,665 | 100% |
Protein is set at 2.6g per kg of lean body mass (139 lbs lean mass for this man). Fat targets 35% 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 calories555 cal
- Per-meal protein55g
- Per-meal carbs32g
- Per-meal fat23g
4 Meals Per Day
- Per-meal calories416 cal
- Per-meal protein41g
- Per-meal carbs24g
- Per-meal fat17g
5 Meals Per Day
- Per-meal calories333 cal
- Per-meal protein33g
- Per-meal carbs19g
- Per-meal fat14g
Research shows muscle protein synthesis is maximized with 30-40g protein per meal. 55g per meal in 3 meals is within the optimal range.
What These Macros Look Like in Food
Protein: 164g
- 5 x 100g chicken breast (31g each)
- 27 large eggs (6g each)
- 10 cups whole-milk Greek yogurt (17g each)
- 7 cups cottage cheese (25g each)
Carbs: 97g
- 4 medium sweet potatoes (26g each)
- 2 cups dry oats (54g each)
- 2 cups cooked lentils (40g each)
- 2 cups cooked brown rice (45g each)
Fat: 69g
- 5 tbsp olive oil (14g each)
- 5 half avocados (15g each)
- 5 oz mixed nuts (14g each)
- 5 x 100g salmon fillet (13g 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 much weight will I lose at 1665 calories?
At 1665 calories per day, a 170 lb man should lose approximately 0.83 lbs per week. This assumes a TDEE of 2082 at sedentary activity and a deficit of 417 calories per day. Results vary based on actual metabolic rate, training load, and adherence.
Why is fat set at 69g for a cutting diet?
Fat is set at 37% of total calories, which is 621 calories or 69g per day. Fat is essential for hormone production, fat-soluble vitamin absorption, and satiety. During a deficit, fat is set at or above 35% of target calories to protect hormonal function and satiety while losing weight. Dropping fat below 20% of total calories can impair testosterone, estrogen, and recovery.
How do I split 164g of protein across meals?
Across 3 meals, each meal needs about 55g of protein. Across 5 meals or snacks, each needs about 33g. Research shows protein synthesis is maximized with 30-40g per meal for most people. 55g per meal in 3 meals is within the optimal 30-40g range.
What are 97g of carbs used for in a cutting diet?
The 97g of carbs provides 388 calories for workouts and brain function. Carbohydrates replenish muscle glycogen after training, supporting performance and recovery. On a cut, carbs fill the remaining calories after protein and fat. At 97g, this is a moderate-carb cut, not a low-carb diet.
When to Recalculate These Macros
Not losing weight after 2 consistent weeks
Reduce by 100-150 cal/day, pulling from carbs first. Your actual TDEE may be slightly below the 1.2x estimate. Confirm tracking accuracy before cutting further.
Losing more than 1.5 lbs per week
Add 100-200 cal/day from carbs. At 170 lbs, faster loss increases muscle loss risk and energy crashes. The target rate is 0.5-1 lb per week on a cut.
Lost 10 or more lbs from this starting weight
Recalculate at your new weight. BMR and TDEE drop as you lose mass. Eating the macros for 170 lbs when you weigh less will slow progress.
Other Weights and Goals
Same Weight and Goal, Different Activity Levels
Related Resources
Get Your Exact Macros with FitCommit
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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