Adult arithmetic workspace only. Calories are entered by you; this tool does not prescribe them. Not for children, pregnancy, eating-disorder care, diagnosis, or treatment. Consult a qualified clinician or dietitian for individualized guidance.
General estimate for planning only — not medical advice. Consult a doctor about your specific situation.
Calculation details
Adult screening estimate only, not a diagnosis. Body composition, age, pregnancy, medical history, and population-specific risk can change interpretation; discuss health decisions with a qualified clinician.
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What does this calculator estimate?
Macro calculator: turn your daily calorie target into protein, fat, and carb gram targets for meal planning. Editable ratios, free, runs in your browser.
How this calculator works
Formula
Protein grams = weight kg × selected grams/kg. Fat grams = entered calories × fat share ÷ 9. Carbohydrate grams are the calorie remainder ÷ 4, using 4 kcal/g for protein and carbohydrate and 9 kcal/g for fat.
Worked example
At a user-selected 2,400 calories, 80 kg, 1.6 g/kg protein, and 30% fat, the arithmetic yields 128 g protein, 80 g fat, and 292 g carbohydrate.
Assumptions to verify
- The user—not the calculator—selects the calorie total and macro assumptions.
- The workspace is limited to adults who confirm age 18 or older.
- Clinical conditions, pregnancy, eating-disorder care, allergies, medications, and individualized nutrition needs are not modeled.
Frequently asked questions
Does this prescribe calories?
No. The calorie total is entered by you; this tool only performs arithmetic.
Why is carbohydrate the remainder?
Protein and fat assumptions are allocated first, then remaining calories are divided by 4 kcal per gram.
Who should not rely on this tool?
Children, pregnant people, people receiving eating-disorder care, and anyone needing clinical nutrition guidance should consult a qualified professional.
Cite this tool
BoringToolsKit. “Macro Planning Calculator.” boringtoolskit.com/macro-planning-calculator/ (reviewed July 2026). Free to reference in articles, syllabi, and answer posts with a link.
Privacy: Inputs and results stay in this browser. Any future sponsored recommendation or advertisement will be clearly labeled and kept separate from the calculation.
How This Tool Works
Calculation Method
The tool applies the displayed formula or calculation logic to the values entered and returns a planning result.
Evidence basis
No unrelated authority link is added merely to make this page look sourced. Tool-specific external sources are shown only when they directly support the method, rate, or rule.
Assumptions to Verify
- These tools provide general estimates for planning and education only.
- They are not medical advice and not a substitute for a qualified healthcare professional.
- Always consult your doctor or another healthcare provider about your specific situation.
Privacy: The calculation runs in this browser. Shared links contain the page address only, not your inputs or results.