High-protein cut
Best when dieting, hunger control matters, or you want more insurance against losing lean mass.
Protein stays high first, then carbs and fats fit around the calorie deficit.
Free macros calculator
Turn calories into protein, carbs, and fats that fit the phase.
Use this macros calculator to turn a calorie target into a practical daily split for fat loss, maintenance, or lean gain. Start with calories, choose the style that matches your training, and use body weight if you want protein anchored more intelligently than percentages alone.
Best use case
Turning a calorie goal into grams you can actually track and repeat.
Best starting point
Set calories first, then let protein lead before you obsess over carb versus fat ratios.
What to do next
Use meal timing and meal prep once the daily split looks realistic enough to keep.
Free protein, carbs, and fats calculator
Turn one calorie target into a macro split you can actually use.
Start with daily calories, choose the phase you are in, then let the calculator set protein, carbs, and fats around that target. Add body weight if you want protein anchored to something more specific than percentages alone.
Quick presets
Inputs
Start with calories, then add body weight if you want a protein anchor.
kcal
Need the calorie target first? Use the TDEE calculator or the calorie deficit planner.
kg
Add body weight to let the calculator nudge protein up when percentages alone look too low.
Pick the phase you are in
Match the split to your activity
Choose a macro style
Your macro targets
Enter a calorie target to see your macros.
Once calories are set, the calculator will break them into protein, carbs, and fats based on your phase, activity, and macro style.
Next steps
Calories set first. Execution second.
Macros help most when they sit on top of a realistic calorie target and a meal structure you can repeat without thinking all day.
Choose A Split
The right split depends on the job the calories need to do.
Macro ratios matter less than most people think, but they still change how easy the plan is to execute. A good split protects recovery, supports training, and stays tolerable enough that you can repeat it next week.
Balanced maintenance
The cleanest starting point if you want decent training energy without overthinking the split.
Useful when body weight is stable and you want something repeatable across the week.
Performance-focused
A better fit when training quality matters more than eating lower-carb or lower-fat.
This pushes more calories into carbs so sessions and recovery are easier to support.
Lower-carb setup
A preference-based option when you want more fat and fewer carbs, especially outside higher-volume training blocks.
It can work well, but it is usually not the best default for hard endurance or high-volume lifting phases.
Calories still decide whether you lose, maintain, or gain.
Macro tracking is most useful after the calorie target is already realistic. If the intake target is off, a prettier ratio will not fix the underlying plan.
Protein Anchor
Set protein first, then let carbs and fats support the plan.
Percentages are convenient, but body weight gives you a better reality check, especially during fat-loss phases. That is why the calculator can use body weight to push protein up when a percentage-based split comes in too low.
After protein is set, carbs usually do more of the work for training performance, while fats help keep the diet livable and cover baseline needs.
Maintenance
1.4 to 1.8 g/kg
Usually enough to support training and recovery without forcing protein unnecessarily high.
Fat loss
1.8 to 2.2 g/kg
A stronger protein anchor helps preserve lean mass and usually improves satiety during a cut.
Lean gain
1.6 to 2.0 g/kg
Keep protein solid, then let extra carbs do more of the work for performance and progressive overload.
Adjustment Guide
Adjust the plan in the order that actually matters.
Most macro plans fail because people keep rewriting them faster than they can evaluate them. Make fewer changes, make them with a reason, and do not touch the ratios until calories and adherence are already in a sensible place.
01
Hold the split for 10 to 14 days
Do not rewrite the plan after one off day. Macro targets only become useful when you have enough reps to see a trend.
02
Fix calories before chasing ratios
If body weight is moving the wrong way, fix the calorie target first. Macro ratios rarely rescue a bad intake target.
03
Move one variable at a time
When performance is dragging, raise carbs first. When hunger is the problem, lift protein or fat before overhauling everything.
04
Recalculate when the phase changes
A maintenance split, a dieting split, and a lean-gain split should not all stay identical once calories and training demands change.
Frequently Asked Questions
What is the best macro split for fat loss?
There is no single perfect split, but most people do better with higher protein and enough carbs to keep training and adherence stable. The calorie deficit still drives fat loss; macros mainly help you hold the diet together better.
Should protein be set in grams or percentages?
Grams are usually more useful because body weight and training load matter. Percentages can accidentally push protein too low on lower-calorie diets, which is why this calculator uses body weight as an optional protein floor.
Do low-carb macros help everyone lose fat faster?
Not necessarily. Low-carb can be a preference win for some people, but fat loss still comes from the calorie deficit. If training quality drops hard on fewer carbs, a more balanced split is often easier to sustain.
How often should I change my macros?
Change them when calories change meaningfully, body weight shifts enough to affect protein needs, or your training block changes. Minor day-to-day variation does not mean the whole split needs to be rewritten.
What matters more: hitting macros exactly or being consistent?
Consistency. Being close enough most days matters more than trying to hit every gram perfectly and then dropping the plan a week later.
Research and reference notes
Evidence-based recommendations for natural bodybuilding contest preparation, including protein targets during dieting phases.
Meta-analysis on protein requirements for maximizing resistance training adaptations.
3. Jager et al. (2017) ISSN Position Stand: Protein and Exercise
Sports nutrition guidance on protein ranges for active adults and athletes.
4. Thomas et al. (2016) Position of the Academy of Nutrition and Dietetics
Nutrition and athletic performance guidance covering carbohydrates, fats, and training support.
5. Dietary Reference Intakes for Energy, Carbohydrate, Fat, and Protein
Baseline population guidance for carbohydrate, fat, and protein intake ranges.