Macros Calculator
Turn body stats and activity into a clear calorie target, then break it into protein, carbs, and fat grams with a dashboard-style planning flow.
Build your macro target
Start with body stats, then layer activity, goal, and macro strategy.
This is the actionable number after resting energy, activity, and goal direction are combined into one daily target.
Rest-only calorie baseline from body stats.
Estimated daily calories before cut or gain adjustments.
Your current preset is Balanced, which controls how calories are allocated across all three macro groups.
What Is a Macros Calculator?
A macros calculator turns a calorie target into practical daily gram targets for protein, carbohydrates, and fat. That matters because calorie advice is often too abstract to follow consistently. Once the user sees grams instead of only calories, the daily plan becomes easier to apply to meals, grocery decisions, and training routines.
The best versions of this page do not jump straight to macro numbers without context. They show the energy chain first: resting calorie needs, maintenance calories, goal adjustment, then macro allocation. That structure makes the output feel more credible and also helps the user understand why their targets change when activity or goal changes.
How to Calculate Macros
The usual workflow starts with BMR. A formula such as Mifflin-St Jeor uses age, sex, height, and weight to estimate resting calorie needs. That number is then multiplied by an activity factor to estimate maintenance calories. From there, a calorie target is adjusted based on whether the goal is fat loss, maintenance, or muscle gain.
After calories are set, the target is divided into protein, carbs, and fat based on the chosen split. Protein and carbs each contain 4 calories per gram, while fat contains 9 calories per gram. That means the same calorie target can create very different daily gram totals depending on whether the user selects a balanced, high-protein, lower-carb, or higher-carb strategy.
This page is intentionally built like a compact nutrition dashboard so the user can see the full chain instead of just a single answer. That makes it more useful for comparing strategies and also makes the next-step path to TDEE and protein planning much more obvious.
Worked Examples
A moderately active user with a maintenance level around 2,350 calories can use a balanced split to land at a practical combination of protein, carbs, and fat without forcing an aggressive diet change.
The same person can switch to a fat-loss target and use a higher-protein split. Calories drop, but protein remains relatively supported, which is exactly the kind of tradeoff users often want to compare visually.