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Protein (g)
Macro Calculator
Calories set the energy budget; macros decide where those calories come from. This macro calculator turns a daily calorie target into grams of protein, carbohydrate and fat. You can pick common goal-based splits (fat loss, muscle gain, balanced, lower-carb) or enter your own percentages. The output is a practical daily target sheet you can use with any food-tracking method. Figures and examples are oriented toward European users, with euro amounts and metric units where relevant.
Enter a valid calorie amount. Custom ratios must add up to 100%.
Daily macro targets
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Carbs (g)
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Fat (g)
How to Use the Macro Calculator
- Enter your daily calorie target (from a TDEE or calorie calculator).
- Select a goal preset or switch to custom and set protein, carb and fat percentages.
- Ensure custom ratios add to 100%, then calculate.
- Use the gram targets as daily guides and adjust based on hunger, performance and progress.
Start with the inputs shown in the calculator and use the units or options that match your situation. Enter realistic values rather than estimates when you have the exact figures available. After you select Calculate, check the displayed result and the supporting breakdown. If you change an input, run the calculation again so the result reflects the updated assumptions. The tool is designed to make the process quick while keeping the underlying steps understandable.
Macro Calculator Formula Explained
Calories × Macro % ÷ Calories-per-Gram
Protein and carbohydrate each contribute approximately 4 kcal per gram; fat contributes approximately 9 kcal per gram. For a given calorie total C and protein percentage P: protein grams = (C × P/100) ÷ 4. The same pattern applies to carbs. Fat grams = (C × F/100) ÷ 9. Presets such as 40/30/30 for fat loss or 30/45/25 for muscle gain are common starting points, not universal rules. Individual preference, training style and medical needs should refine the split over time.
The displayed result depends on the inputs you provide and the calculation method described on this page. Keeping the inputs consistent with the stated units is important because changing a unit, period, rate, date, or percentage can change the result significantly. The calculator performs the arithmetic automatically, while the explanation gives you enough context to understand what is being combined, converted, or compared. For estimates, treat the output as an indication based on your assumptions rather than as a guaranteed real-world outcome.
Macro Calculator Example Calculation
At 2,000 kcal with a 30/40/30 split you get roughly 150 g protein, 200 g carbohydrate and 67 g fat. A higher-protein cut preset shifts grams toward protein while keeping the calorie budget fixed. Track weekly averages rather than perfection every day.
This example is meant to show the order of the inputs and the way the final result is reached. In your own calculation, replace the example figures with your actual values and keep the same units throughout. A useful check is to change one input slightly and confirm that the result changes in a sensible direction. That simple check can help catch an incorrect unit, percentage, date, or other assumption before you rely on the result.
When to use this tool
Use this once you have a calorie target from TDEE or a dietitian’s plan—common for gym goals and structured eating across Europe.
Key Features & Benefits of This Macro Calculator
- Built for real use — Use this once you have a calorie target from TDEE or a dietitian’s plan—common for gym goals and structured eating across Europe.
- Instant, free and private — runs entirely in your browser, no sign-up, nothing stored.
- Formula-accurate — Calories × Macro % ÷ Calories-per-Gram Protein and carbohydrate each contribute approximately 4 kcal per gram; fat contributes approximately 9 kcal per gram.
- Works on any device — mobile or desktop, no app or installation needed.
Macro Calculator — FAQs
Do the percentages have to be exact every day?
Many people aim for weekly averages rather than perfect daily hits. Consistency over weeks matters more than single-day precision.
How much protein do I need?
Research often supports roughly 1.6–2.2 g per kg of body weight for people who train, with higher ends used during fat-loss phases. The calculator lets you set any percentage that matches your plan.
Can I use this with intermittent fasting?
Yes. The daily totals still apply; you simply distribute the same grams inside your eating window.
Do I need to hit my macros exactly every day?
No. Weekly averages matter more than daily precision — being within a reasonable range most days is enough for most goals.
The FAQs below address common questions about using this Macro Calculator. They also explain assumptions and situations where the result may need additional context. If your situation uses a different rule, local rate, institutional policy, or professional standard, use the relevant source alongside the calculator rather than treating a general estimate as a definitive answer.