What Should My Macros Be? A Simple Framework to Find Your Split
“What should my macros be?” is the most common nutrition question in fitness, and the honest answer is: it depends on your goal, your size, and how you like to eat. But it is not guesswork. There is a reliable framework that produces your numbers in five minutes. This guide walks through it with three fully worked examples.
The Framework in 30 Seconds
- Calories first: find maintenance (TDEE), then add or subtract based on your goal.
- Protein second: anchor it to body weight and goal (0.8 to 1.2g per pound).
- Fat third: set a floor for hormones and sanity (0.3 to 0.5g per pound).
- Carbs last: fill every remaining calorie with carbs.
That order matters. Protein and fat have physiological jobs; carbs are the flexible energy macro. People who start with carb percentages and work backwards usually end up with too little protein, which is the number one macro mistake.
For the full beginner walkthrough, see how to count macros. For instant numbers, use the macro calculator.
Step 1: Calories From Your Goal
Your TDEE (total daily energy expenditure) is the baseline. Get it from our TDEE calculator or estimate and verify over two weeks. Then adjust:
| Goal | Calorie target | Expected rate |
|---|---|---|
| Fat loss | TDEE minus 300 to 500 | 0.5 to 1 lb/week lost |
| Lean muscle gain | TDEE plus 200 to 300 | 0.25 to 0.5 lb/week gained |
| Maintenance / recomp | TDEE | Weight stable, composition improves |
| Aggressive fat loss | TDEE minus 500 to 750 | 1 to 1.5 lb/week (short phases only) |
Everything below flows from this number. If your calories are wrong, perfect macro percentages will not save you.
Step 2: Anchor Protein
| Situation | Protein target |
|---|---|
| Cutting / fat loss | 1.0 to 1.2g per lb body weight |
| Bulking / muscle gain | 0.8 to 1.0g per lb body weight |
| Maintenance | 0.7 to 1.0g per lb body weight |
| Significantly overweight | Use goal weight, not current weight |
Protein has 4 calories per gram. A 180g protein target contributes 720 calories. Write that down; you will subtract it in step 4.
Step 3: Set Your Fat Floor
Fat needs are more stable across goals than protein: 0.3 to 0.5 grams per pound of body weight, or 20 to 30 percent of total calories. Fat has 9 calories per gram.
Go toward the higher end if you feel better eating fattier foods, have a history of hormonal issues on low fat, or simply enjoy the taste. Go lower if you prefer big carb-heavy meals and feel fine. Both work as long as you stay above the floor.
Step 4: Carbs Get the Rest
Carbs (4 calories per gram) fill whatever calories remain: (Total calories minus protein calories minus fat calories) divided by 4 = carb grams.
This usually lands between 150 and 450 grams depending on your size and goal. There is no universal “correct” carb number. The correct number is the one left over after protein and fat are set properly.
Worked Example 1: Cutting (190 lb Man)
- TDEE: 2,900, cutting target 2,400 (500 deficit)
- Protein: 1.1g x 190 = 209g (836 cal)
- Fat: 0.4g x 190 = 76g (684 cal)
- Carbs: (2,400 minus 836 minus 684) / 4 = 220g (880 cal)
- Split: 209g protein / 220g carbs / 76g fat
Worked Example 2: Lean Bulking (165 lb Woman)
- TDEE: 2,300, bulking target 2,550 (250 surplus)
- Protein: 0.9g x 165 = 149g (596 cal)
- Fat: 0.45g x 165 = 74g (666 cal)
- Carbs: (2,550 minus 596 minus 666) / 4 = 322g (1,288 cal)
- Split: 149g protein / 322g carbs / 74g fat
Worked Example 3: Maintenance Recomp (150 lb Beginner)
- TDEE: 2,200, target 2,200 (maintenance)
- Protein: 0.9g x 150 = 135g (540 cal)
- Fat: 0.4g x 150 = 60g (540 cal)
- Carbs: (2,200 minus 540 minus 540) / 4 = 280g (1,120 cal)
- Split: 135g protein / 280g carbs / 60g fat
Notice how different the three splits look. That is the point: there is no single “correct” macro ratio, only the correct numbers for your situation.
Common Splits (and When They Fit)
You will see percentage splits everywhere. They are shorthand, not science, but here is how they map:
- 40/30/30 (protein/carbs/fat): classic cutting split. High protein, moderate everything else.
- 30/40/30: balanced default. Works for maintenance and gentle recomps.
- 25/50/25: bulking-leaning. High carbs to fuel training volume.
- 35/25/40: lower-carb preference. Fine if you like fatty foods, as long as protein stays anchored.
- Keto (~5/10/70+): carbs under 50g. A different system entirely; see our keto macro calculator if that is your path.
Percentages are a starting sketch. Gram targets from the framework above are the finished plan.
Adjusting Your Split Over Time
Your macros are not permanent. Revisit them when:
- Body weight changes 5-plus pounds: recalculate. A lighter you needs fewer calories; protein targets shift too.
- Goal changes: cutting to bulking (or reverse) means rebuilding the whole split, not tweaking one macro.
- Progress stalls 2 to 3 weeks: adjust calories by 150 to 200 (from carbs or fat), keep protein steady.
- Adherence collapses: the split might not fit your food preferences. A higher-fat, lower-carb version of the same calories often fixes “I can’t stick to this.”
Change one variable at a time and give it two weeks. The people who succeed at macros are not the ones with perfect starting numbers; they are the ones who adjust calmly based on data.
What If You Hate Tracking?
You have options between “track everything” and “eat randomly”:
- Protein plus calories: track only total calories and protein grams. This captures most of the benefit with half the effort.
- Hand portions: a palm of protein, a fist of carbs, a thumb of fat per meal, adjusted to your size. Crude but directionally correct.
- Template days: build 2 to 3 full days of eating that hit your macros, then rotate them. You only did the math once.
Full tracking for 2 to 3 months teaches you enough that any of these looser methods actually work afterward.
FAQ
What should my macros be for weight loss?
Start 300 to 500 calories below maintenance, set protein at 1 to 1.2g per pound of body weight, fat at 0.3 to 0.5g per pound, and fill remaining calories with carbs. A 180-pound person often lands near 180 to 215g protein, 55 to 90g fat, and 150 to 220g carbs.
What should my macros be to gain muscle?
Eat 200 to 300 calories above maintenance, protein at 0.8 to 1g per pound, fat at 20 to 30 percent of calories, and carbs with the rest. Expect a carb-heavy split; that is normal and desirable for training fuel. Full guide: macros for bulking.
Is there a single best macro ratio?
No. The “best” split is the one built from your calorie target with protein anchored to your body weight. Percentage ratios are approximations. Two people with the same 40/30/30 split can have wildly different gram targets, and grams are what your body actually processes.
Should macros be different on rest days?
Slightly, if you want. Many people keep protein and fat constant and drop carbs by 25 to 50 grams on rest days. It is a fine-tuning tactic, not a requirement. Weekly calorie totals matter far more than daily micro-adjustments.
How often should I recalculate my macros?
Every 4 to 8 weeks, or whenever your weight moves 5-plus pounds or your goal changes. Recalculating monthly during an active cut or bulk keeps targets aligned with your new body.
Why do my macros feel impossible to hit?
Usually one of three things: the calorie target is unrealistic for your lifestyle, protein is set higher than your eating habits support (build up gradually), or the fat/carb balance fights your food preferences (shift calories between them freely). The framework is adjustable; use that.