1. Enter your measurements
Use a recent adult age, height, and body weight. Switch to imperial units if you track inches and pounds.
Daily nutrition planning tool
Macro Calculator
Estimate a practical daily calorie target plus protein, carbohydrate, and fat grams from your body size, activity level, goal, and preferred macro split.
Use the result as a starting range: A macro calculator cannot measure your metabolism directly. Track your weight trend, hunger, training, and recovery for a few weeks before making small adjustments.
Calculate Your Daily Macros
Enter adult body measurements, activity, and goal. The tool estimates calories and turns your chosen percentage split into daily grams.
Your estimated daily target
--
Daily calories--
Protein--
Carbohydrates--
Fat--
Selected macro split: --
CaloriesStart with an estimated maintenance target, then adjust for fat loss or weight gain.
ProteinSee daily protein grams alongside carbohydrate and fat targets.
FlexibleCompare balanced, higher-protein, and lower-carb splits without changing the core inputs.
PrivateThe calculation runs in your browser; the form values are not uploaded.
How to Use the Macro Calculator
The calculator is most useful when the inputs are consistent and the result is checked against real progress rather than treated as an exact prescription.
2. Choose activity honestly
Pick the activity level that best reflects your weekly training and daily movement, not your ideal routine.
3. Select a goal
Choose weight loss, maintenance, or weight gain. The target changes before the macro percentages are converted to grams.
4. Track and adjust
Compare weekly averages for 2-4 weeks. Change calories gradually if your goal, recovery, or performance is not moving as expected.
What the Macro Calculator Estimates
The result combines a resting-energy estimate, an activity multiplier, a goal adjustment, and the selected macro percentages.
| Part | What it means | How to use it |
|---|---|---|
| Calories | An estimated daily energy target for your goal. | Compare with your weekly weight trend, hunger, and training. |
| Protein | The protein share of the selected calorie split converted to grams. | Spread it across meals that fit your preferences and schedule. |
| Carbohydrates | The carbohydrate share converted using 4 calories per gram. | Adjust food choices around activity and training tolerance. |
| Fat | The fat share converted using 9 calories per gram. | Keep enough dietary fat for preference, satiety, and meal flexibility. |
How the Estimate Works
This is a transparent planning model, not a direct measurement of total daily energy expenditure.
- Resting energy is estimated from age, sex used for the equation, height, and weight with the Mifflin-St Jeor formula.
- An activity multiplier turns resting energy into an estimated maintenance range.
- The goal changes that maintenance estimate by a moderate deficit, no adjustment, or a modest surplus.
- Calories are split into grams using 4 calories per gram for protein and carbohydrates and 9 for fat.
Why use a range? Water, food volume, steps, sleep, stress, and training can move scale weight even when your underlying trend is stable.
Macro Calculator Examples
These examples show how the same body measurements can produce different targets when the goal or split changes.
Fat-loss starting point
Adult, 75 kg, moderate activity, lose weight
Choose a moderate deficit, keep protein consistent, and review the 2-4 week average rather than one morning of scale data.
Maintenance macros
Adult, 165 lb, light activity, maintain weight
Use the maintenance estimate as a baseline, then compare it with your actual weight trend and hunger.
Higher-protein gain phase
Adult, 80 kg, high activity, gain weight
A modest surplus and higher-protein split can provide a practical starting point without forcing a large calorie jump.
Inputs, Limits, and Safety Notes
A macro calculator is useful for planning, but it cannot replace individualized medical or sports-nutrition advice.
Estimates are not measurements
Equations can be wrong for an individual. Use real weight trends, waist measurements, training, hunger, and recovery as feedback.
Special situations need care
Pregnancy, eating-disorder history, diabetes, kidney disease, medications, and clinical nutrition needs require a qualified professional.
The split is a preference tool
Balanced, higher-protein, and lower-carb presets are starting options. Your food preferences and tolerance still matter.
Related Body Composition Tools
Use the macro result alongside other measurements instead of relying on one calculator output.
Body Recomposition Calculator
Plan calories, protein, target body fat, lean mass, and a realistic recomposition timeline.
Lean Body Mass Calculator
Estimate lean mass and fat mass when body-fat data is available.
BMI Calculator
Add height-and-weight context, while remembering that BMI does not measure body composition.
Ideal Weight Calculator
Compare a goal weight with several adult reference formulas.
AI Body Fat Estimator
Use a photo estimate as one additional body-composition reference.
Macro Calculator FAQ
A macro calculator estimates daily calories and divides them into protein, carbohydrates, and fat. It uses body measurements, activity, a goal, and a selected percentage split.
There is no single best split for everyone. A moderate calorie deficit, adequate protein, and a split you can follow consistently are more important than a perfect percentage.
Use the result as a starting range, then adjust from your average weight trend, hunger, training, and recovery. Individual needs vary, especially with medical or sports-nutrition considerations.
A calorie calculator focuses on total energy. A macro calculator adds a protein, carbohydrate, and fat breakdown so you can turn that energy target into daily gram targets.
Yes. Select Gain weight and review the resulting modest surplus. Increase gradually and monitor weight, training performance, digestion, and recovery.
Recheck after a meaningful change in body weight, activity, or goal, or after several weeks of a stable trend. Daily recalculation usually adds noise rather than accuracy.