Macro Calculator — Protein, Fat & Carb Targets
Turn a daily calorie target into protein, fat and carbohydrate gram targets. Pick a split for your goal, check it against the Dietary Reference Intake ranges and protein-per-kilogram guidance, and see your macros per meal.
Macros per Meal
Your daily targets divided evenly across meals.
| Per | Calories | Protein | Fat | Carbohydrate |
|---|
Compare Splits at Your Calories
The same calories distributed by common splits.
| Split | P / F / C | Protein | Fat | Carbohydrate | Within AMDR? |
|---|
How this calculator works
Protein and carbs provide 4 calories per gram, while fat provides 9 calories per gram — this calculator converts your percentage split into actual gram targets.
Grams = (Calories × percent ÷ 100) ÷ calories per gram — protein & carbs = 4 kcal/g · fat = 9 kcal/g
The guideline check uses the Acceptable Macronutrient Distribution Ranges (AMDR) for adults from the Institute of Medicine's Dietary Reference Intakes, also used by the 2020–2025 Dietary Guidelines for Americans: protein 10–35%, fat 20–35% and carbohydrate 45–65% of calories. Splits outside these ranges — such as ketogenic diets — are used by some people, but are outside general population guidance.
By Suhaib Hassan · Reviewed 28 September 2026 against the Dietary Reference Intakes and ISSN guidance · How CalculatePilot verifies formulas →
Adjusting macro splits for different goals
A 30/30/40 split works well as a general default, but different goals often call for different ratios. Higher protein (35-40%) is common for muscle-building or fat-loss phases to help preserve lean mass. Lower carb, higher fat splits are used in specific approaches like ketogenic diets.
Protein needs are the most consistent recommendation across goals — most guidance suggests prioritizing adequate protein intake first, then adjusting the fat-to-carb ratio based on personal preference and how your body responds. For people who exercise regularly, the International Society of Sports Nutrition suggests about 1.4–2.0 g of protein per kg of body weight per day; the RDA for adults in general is 0.8 g/kg.
A worked example
At 2,400 calories/day with a 35/25/40 split (higher protein): protein target is (2400 times 0.35) divided by 4, or 210g; fat is (2400 times 0.25) divided by 9, about 67g; and carbs are (2400 times 0.40) divided by 4, or 240g.
Compare that to a standard 30/30/40 split at the same calorie level: protein drops to 180g while fat rises to 80g — the same total calories, distributed differently based on which macro is prioritized. Note that 40% carbohydrate is just below the 45% lower end of the AMDR.
Adjusting macros for different goals
Higher protein (35-40%) tends to support muscle retention during fat loss, while endurance athletes often benefit from a higher carbohydrate percentage to fuel training. Protein needs are also often better set as a direct gram target based on body weight (see our Protein Calculator) rather than a pure percentage, since protein needs don't scale purely with total calories the way fat and carbs more flexibly do.
Sources
- Institute of Medicine. Dietary Reference Intakes for Energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein, and Amino Acids. National Academies Press, 2005 (AMDR; fiber 14 g per 1,000 kcal).
- Dietary Guidelines for Americans, 2025–2030 (saturated fat no more than 10% of calories; protein 1.2–1.6 g/kg/day)
- Jäger R, et al. International Society of Sports Nutrition position stand: protein and exercise. J Int Soc Sports Nutr 2017;14:20.
Frequently asked questions
What macro split should I use?
A 30/30/40 (protein/fat/carb) split is a common general-purpose starting point, but ideal splits vary by goal — higher protein for muscle building, higher fat for some low-carb approaches.
What if my percentages don't add up to 100%?
Adjust the values so protein, fat, and carb percentages sum to 100% for the gram targets to match your total calorie goal exactly.
Which macro is most important to prioritize?
Most nutrition guidance prioritizes protein intake first for muscle maintenance and satiety, then allows more flexibility in balancing fat and carbohydrate based on personal preference and performance.
Do I need to hit my macros exactly every day?
Being consistently close over time matters more than hitting exact numbers daily — small day-to-day variation is normal and generally doesn't meaningfully affect results.
Should my macro percentages change if I'm trying to lose fat?
Many people increase protein percentage during fat loss to help preserve muscle mass, often to 35-40% of total calories, adjusting fat and carbs accordingly.
What are the recommended macro ranges for adults?
The Acceptable Macronutrient Distribution Ranges for adults are 10–35% of calories from protein, 20–35% from fat and 45–65% from carbohydrate.
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