Macro calculator by body type.
This free macro calculator by body type turns your stats, somatotype, and goal into daily protein, carb, and fat targets. Pick ectomorph, mesomorph, or endomorph and the split shifts toward more carbs or more fat - while protein and total calories stay evidence-based. Treat the result as a starting split to test, not a verdict.
your stats
your daily split
Mesomorph tuning: balanced split, fat at 0.9 g/kg. Maintenance (TDEE) estimate: 2,728 calories. Protein held at 2.0 g/kg for every body type; carbs fill the rest.
the short answer
A macro calculator by body type estimates your maintenance calories (TDEE) with the Mifflin-St Jeor equation times an activity factor, adjusts for your goal (cut -20%, maintain 0%, bulk +10%), then splits the calories by somatotype. Protein stays fixed at 2.0 g per kg of bodyweight for all types. Fat is set by body type - about 0.8 g/kg for ectomorphs, 0.9 g/kg for mesomorphs, 1.1 g/kg for endomorphs - and carbs take whatever calories remain.
How this macro calculator by body type works.
"Macros" are the three macronutrients that make up your calories: protein, carbohydrate, and fat. A macro calculator by body type takes your daily calorie target and splits it into grams of each, then leans the carb-to-fat balance one way or the other depending on your somatotype.
The math runs in four steps. First it estimates your resting metabolic rate with the Mifflin-St Jeor equation: for men, 10 x kg + 6.25 x cm - 5 x age + 5; for women, the same minus 161. Second, it multiplies that by an activity factor (1.2 sedentary up to 1.9 extra active) to get your TDEE - your maintenance calories. Third, it applies a goal adjustment: a 20% deficit to cut, no change to maintain, or a 10% surplus to bulk. Notice that body type does not touch your calories at any point - only how the calories are split. Holding calories at maintenance while keeping protein high is the setup for a body recomposition, where you build muscle and lose fat at the same time.
Finally it sets your macros. Protein is fixed at 2.0 g per kg of bodyweight - a well-supported 1.8-2.2 g/kg range that does not change with body type. Fat is where somatotype comes in: 0.8 g/kg for an ectomorph, 0.9 g/kg for a mesomorph, and 1.1 g/kg for an endomorph. Protein and fat calories are subtracted from your target, and every remaining calorie goes to carbohydrate. So an endomorph gets more fat and fewer carbs, and an ectomorph gets the reverse. Conversions: protein and carbs are 4 calories per gram, fat is 9.
Want the split without the body-type step? The standard macro calculator applies one balanced ratio to everyone, and the TDEE calculator gives you the maintenance number this tool builds on.
Ectomorph, mesomorph, and endomorph splits.
Somatotypes are a shorthand for how a body tends to look and store mass. They are a reasonable place to start a diet, but they are a heuristic, not a diagnosis - so use the split below as a first draft you test, not a rule you obey.
Ectomorph
Naturally lean and often carb-tolerant. Fat is held lower (about 0.8 g/kg) so more calories go to carbs, which suits high training volume and gaining size. A carb-forward split is the usual starting point.
Mesomorph
Builds muscle readily and handles a balanced diet well. Fat sits at 0.9 g/kg for an even split of carbs and fat around a high-protein base - a sensible default for most goals.
Endomorph
Gains muscle and fat easily and often feels better on fewer carbs. Fat is set higher (about 1.1 g/kg) and carbs come down, which many find easier to control appetite on during a cut.
Most people are a blend of two types. If none fits cleanly, start with mesomorph, run it for two to three weeks, and let the results push you toward more or fewer carbs.
How coaches use body type to set a starting split.
Good coaches do not treat somatotype as destiny. But a body type is a fast, explainable way to pick a starting carb-to-fat ratio during onboarding - better than guessing, and easy for a client to understand. You set a defensible first split, then do the real work: watch weight trend, energy, hunger, and adherence over two to three weeks and adjust from there. Our guide on how to adjust client macros walks through that loop.
A body-type calculator like this also makes a friendly first touch to share with a lead - it gives real value and demonstrates your method. If you want the full methodology behind the numbers, see macro coaching methods and how to do nutrition coaching online.
Set a starting split for every client - then adjust it from real data.
A body-type split is a good first draft. Coachway lets coaches set calorie and macro targets like this for every client inside a meal planner with 1,100+ recipes, then track and refine them as check-in data comes in - alongside programming, messaging, and payments in one place. Every feature is included from EUR 69 per month for your first 5 clients.
Macro calculator by body type FAQ.
How does a macro calculator by body type work?
It estimates your maintenance calories (TDEE) with the Mifflin-St Jeor equation times an activity factor, adjusts for your goal, then splits the result into grams of protein, carbs, and fat. The body-type step only changes the carb-to-fat ratio: protein stays fixed near 2.0 g per kg of bodyweight, and your somatotype - ectomorph, mesomorph, or endomorph - shifts fat up or down, with carbs filling whatever calories are left.
What are the best macros for an ectomorph, mesomorph, or endomorph?
As a starting heuristic: ectomorphs tend to handle carbs well, so this tool holds fat lower (about 0.8 g/kg) and pushes more calories to carbs. Mesomorphs get a balanced split with fat near 0.9 g/kg. Endomorphs often do better with fewer carbs, so fat sits higher (about 1.1 g/kg) and carbs come down. Protein stays high for all three. These are starting points, not fixed rules - real needs are decided by results.
Are somatotypes (ecto, meso, endo) scientifically valid?
Somatotypes describe how bodies tend to look and where they carry mass, and they are a useful shorthand for a starting diet. But "carb tolerance by body type" is a coaching heuristic, not a proven metabolic law. Two people with the same somatotype can respond very differently. That is why this calculator only nudges the carb-to-fat ratio and never changes calories or protein based on type - and why the honest move is to adjust from real data.
Does body type actually change how many calories I need?
No - and this tool does not pretend it does. Your calorie target comes from your stats, activity, and goal, the same as any macro calculator. Body type only influences how the remaining calories are divided between carbs and fat. If you want the pure calorie and split math without the somatotype step, use the standard macro calculator instead.
Can coaches use body type to set client macros?
Yes, as a defensible first draft. A somatotype gives a coach a reasonable starting carb-to-fat ratio to explain during onboarding, which is better than guessing. The real skill is iteration: watch weight trend, energy, hunger, and adherence over two to three weeks, then adjust. Coaches on a platform like Coachway set targets like these for every client and refine them as check-in data arrives.
How is this different from a regular macro calculator?
A standard macro calculator applies one fixed carb-to-fat ratio to everyone. This one lets you pick a body type so the split leans toward more carbs for ectomorphs or more fat and fewer carbs for endomorphs, while protein and total calories stay evidence-based. It is the same core math with a body-type lens on the final split.
Related tools and reading.
Macro calculator
The standard split, one balanced ratio for everyone.
toolTDEE calculator
Find the maintenance calories this split is built on.
articleHow to calculate TDEE and macros for clients
The coaching method behind the numbers, step by step.
articleHow to adjust client macros
Turn a starting split into results with check-in data.
This calculator gives general fitness estimates, not medical or clinical nutrition advice. The Mifflin-St Jeor equation and activity multipliers are population averages, and somatotype is a starting heuristic rather than a proven metabolic type - individual needs vary with metabolism, training, and health conditions. Use the result as a starting point, track your own data, and consult a qualified professional for medical needs.
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