What are macros?
Macros (macronutrients) are the three main nutrients your body needs in large amounts: protein, fat, and carbohydrates. Each provides energy (calories) and serves specific functions in your body.
Calculate your daily protein, fat, and carbohydrate targets based on your calorie goal.
Use the calculator to estimate a health or fitness number, then compare it with trends over time and other relevant context.
These tools are for education and planning. They do not replace medical advice.
Macros (macronutrients) are the three main nutrients your body needs in large amounts: protein, fat, and carbohydrates. Each provides energy (calories) and serves specific functions in your body.
Protein needs vary by goal. For general health, aim for 0.8-1g per kg body weight. For muscle building, 1.6-2.2g per kg. For weight loss, higher protein (1.2-1.6g per kg) helps preserve muscle mass and increase satiety.
There is no single best ratio. Balanced (30/30/40) works for most people. Low-carb or keto may help some with weight loss. High-protein supports muscle building. Choose based on your goals, preferences, and how you feel.
Tracking calories is sufficient for weight management. Tracking macros provides more control over body composition and can help optimize performance, muscle gain, or specific health goals. Start with calories, then add macros if needed.
Last updated: May 27, 2026 | Reviewed by Body Tally Team
Use the macro calculator to divide a calorie target into protein, carbohydrates, and fat. Macro planning can help people organize meals around training, fullness, energy, and nutrition preferences.
Body Tally keeps the calculator near the top of the page and adds this guide so you can understand what the tool does, how the inputs affect the result, and what the result can and cannot tell you. Health and fitness formulas are useful for planning, but they work best when treated as estimates and compared with real trends, symptoms, training history, and professional guidance when appropriate.
Protein and carbohydrates provide about 4 calories per gram, while fat provides about 9 calories per gram. Macro targets allocate total calories across those energy values.
The formulas use simplified inputs so they can be calculated quickly in a browser. They do not know your medical history, medications, hormones, lab results, training recovery, sleep, stress, or diagnosis. Use the answer as a starting point, then refine it with consistent measurements and qualified advice when the decision affects health.
Calculator results are useful for learning and planning, but they should not be the only basis for decisions when symptoms, medications, chronic conditions, pregnancy, eating disorder history, injury, or major changes in activity are involved.
If the estimate feels surprising, repeat the measurement, check your unit settings, compare one related calculator, and read the matching guide before acting on the number. Body Tally is built to help you ask better questions, not to replace qualified care.
Calories drive weight change, while macros influence nutrition quality, performance, and satiety.
No. Many people use macros temporarily to learn patterns.
Yes. Preferences, training, and medical needs can change targets.