Macros for 170 lb Women (Bulking, Very Active)
Reviewed by Andrew Menechian, Head of Fitness at FitCommit
Exact macros for a 170 lb woman on a bulking diet. Calculated from estimated lean mass, Katch-McArdle BMR, and a very active TDEE (hard exercise 6-7 days per week).
3,070
Calories
~10% calorie surplus
133g
Protein
532 cal (17%)
405g
Carbs
1620 cal (53%)
102g
Fat
918 cal (30%)
Running a 278 cal/day surplus (10% above TDEE). Expect ~0.56 lbs of weight gain per week, building on 128 lbs of lean mass.
4 weeks
172.2 lbs
8 weeks
174.5 lbs
12 weeks
176.7 lbs
How These Macros Were Calculated
| Body Weight | 170 lbs |
|---|---|
| Estimated Lean Mass | 128 lbs (75% of body weight) |
| Lean Mass (kg) | 57.8 kg |
| BMR (Katch-McArdle) | 1,618 cal/day |
| TDEE (BMR x 1.725) | 2,792 cal/day |
| Target Calories | 3,070 cal/day |
| Daily Surplus | 278 cal/day (10% surplus) |
| Expected Weekly Change | 0.56 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 25% average body fat for women. Activity multiplier 1.725 = hard exercise 6-7 days per week.
Macro Breakdown
| Macro | Grams | Calories | % of Total |
|---|---|---|---|
| Protein | 133g | 532 | 17% |
| Carbohydrates | 405g | 1620 | 53% |
| Fat | 102g | 918 | 30% |
| Total | - | 3,070 | 100% |
Protein is set at 2.3g per kg of lean body mass (128 lbs lean mass for this woman). 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 calories1,023 cal
- Per-meal protein44g
- Per-meal carbs135g
- Per-meal fat34g
4 Meals Per Day
- Per-meal calories768 cal
- Per-meal protein33g
- Per-meal carbs101g
- Per-meal fat26g
5 Meals Per Day
- Per-meal calories614 cal
- Per-meal protein27g
- Per-meal carbs81g
- Per-meal fat20g
Research shows muscle protein synthesis is maximized with 30-40g protein per meal. 44g per meal in 3 meals is within the optimal range.
What These Macros Look Like in Food
Protein: 133g
- 6 scoops protein powder (22-25g each)
- 4 x 100g chicken breast (31g each)
- 5 x 100g lean ground beef (26g each)
- 22 large eggs (6g each)
Carbs: 405g
- 9 cups cooked white rice (45g each)
- 15 medium bananas (27g each)
- 8 cups dry oats (54g each)
- 58 rice cakes (7g each)
Fat: 102g
- 7 tbsp olive oil (14g each)
- 11 tbsp almond butter (9g fat each)
- 6 oz walnuts (18g each)
- 7 tbsp coconut oil (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 25% 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
Why is fat set at 102g for a bulking diet?
Fat is set at 30% of total calories, which is 918 calories or 102g per day. Fat is essential for hormone production, fat-soluble vitamin absorption, and satiety. Keeping fat at 30% of calories maintains hormone function during a calorie surplus. Dropping fat below 20% of total calories can impair testosterone, estrogen, and recovery.
How do I split 133g of protein across meals?
Across 3 meals, each meal needs about 44g of protein. Across 5 meals or snacks, each needs about 27g. Research shows protein synthesis is maximized with 30-40g per meal for most people. 44g per meal in 3 meals is within the optimal 30-40g range.
What are 405g of carbs used for in a bulking diet?
The 405g of carbs provides 1620 calories for workouts and brain function. Carbohydrates replenish muscle glycogen after training, supporting performance and recovery. On a bulk, 405g of carbs drives the calorie surplus needed for muscle growth. Rice, oats, and potatoes are the most efficient sources.
Should I recalculate my macros as I gain weight?
Yes. Recalculate every 10-15 lbs of weight gain. As your weight changes, lean mass, BMR, and TDEE all shift. For a 170 lb woman bulking to 185 lbs, the TDEE shifts by roughly 190 calories and macros should be recalculated.
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 1.725x 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
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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