Macros for 170 lb Women (Bulking, Lightly 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 lightly active TDEE (light exercise 1-3 days per week).
2,450
Calories
~10% calorie surplus
133g
Protein
532 cal (22%)
295g
Carbs
1180 cal (48%)
82g
Fat
738 cal (30%)
Running a 225 cal/day surplus (10% above TDEE). Expect ~0.45 lbs of weight gain per week, building on 128 lbs of lean mass.
4 weeks
171.8 lbs
8 weeks
173.6 lbs
12 weeks
175.4 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 1.375) | 2,225 cal/day |
| Target Calories | 2,450 cal/day |
| Daily Surplus | 225 cal/day (10% surplus) |
| Expected Weekly Change | 0.45 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 1.375 = light exercise 1-3 days per week.
Macro Breakdown
| Macro | Grams | Calories | % of Total |
|---|---|---|---|
| Protein | 133g | 532 | 22% |
| Carbohydrates | 295g | 1180 | 48% |
| Fat | 82g | 738 | 30% |
| Total | - | 2,450 | 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 calories817 cal
- Per-meal protein44g
- Per-meal carbs98g
- Per-meal fat27g
4 Meals Per Day
- Per-meal calories613 cal
- Per-meal protein33g
- Per-meal carbs74g
- Per-meal fat21g
5 Meals Per Day
- Per-meal calories490 cal
- Per-meal protein27g
- Per-meal carbs59g
- Per-meal fat16g
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
- 4 x 100g chicken breast (31g each)
- 22 large eggs (6g each)
- 8 cups whole-milk Greek yogurt (17g each)
- 6 scoops protein powder (22-25g each)
Carbs: 295g
- 7 cups cooked rice (45g each)
- 5 cups dry oats (54g each)
- 11 medium sweet potatoes (26g each)
- 11 medium bananas (27g each)
Fat: 82g
- 6 tbsp olive oil (14g each)
- 5 half avocados (15g each)
- 10 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 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
What are 295g of carbs used for in a bulking diet?
The 295g of carbs provides 1180 calories for workouts and brain function. Carbohydrates replenish muscle glycogen after training, supporting performance and recovery. On a bulk, 295g 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 152 calories and macros should be recalculated.
What foods hit 133g protein, 82g fat, and 295g carbs?
Protein sources for 133g: roughly 4 x 100g portions of chicken breast (31g protein each), or 22 eggs (6g each), combined with Greek yogurt or protein powder. Fat sources for 82g: about 6 tablespoons of olive oil or peanut butter. Carb sources for 295g: roughly 7 cups of cooked rice (45g each) or 11 cups of oats (27g each). A food tracking app is the most accurate way to hit these targets.
How does my activity level affect my 2450 calorie target?
Your Lightly Active activity level uses a multiplier of 1.375, giving a TDEE of 2225 calories. If you were sedentary (1.2x), your TDEE would be approximately 1942 calories. If you were very active (1.725x), it would be approximately 2791 calories. The activity multiplier is the single biggest variable in your calorie target. Getting it right matters more than small differences in the macro split.
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
Previous Weight
160 lbs female bulking lightly active
Next Weight
180 lbs female bulking lightly active
Same Weight and Goal, Different Activity Levels
Sedentary
170 lbs, female, bulking
Lightly Active
170 lbs, female, bulking
Moderately Active
170 lbs, female, bulking
Very Active
170 lbs, female, bulking
Extra Active
170 lbs, female, 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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