This calculator divides a daily calorie target into protein, carbohydrate, and fat grams. You choose the calorie level and the percentage assigned to each macronutrient.
It is useful for building a meal-planning target or comparing macro splits. The tool checks that the three percentages total 100%, then converts calories to grams using the standard energy values for protein, carbohydrate, and fat.
Enter the total calories you plan to consume per day.
Enter the percentage of calories allocated to protein.
Enter the carbohydrate percentage.
Enter the fat percentage.
The percentages must add to exactly 100% before results are shown.
Apply the outputs as daily planning targets rather than exact requirements.
Protein grams = calories × protein % ÷ 4
Carbohydrate grams = calories × carbohydrate % ÷ 4
Fat grams = calories × fat % ÷ 9
Protein and carbohydrate provide about 4 kcal per gram, while fat provides about 9 kcal per gram.
The main result shows the daily protein grams produced by your chosen calorie target and percentage split.
Macro targets are planning estimates. Individual needs can differ with body size, training, health status, food preferences, and professional guidance.
Given: 2,200 kcal with 30% protein, 40% carbohydrate, and 30% fat.
Calculation: Protein = 2,200 × 0.30 ÷ 4 = 165 g. Carbohydrate = 2,200 × 0.40 ÷ 4 = 220 g. Fat = 2,200 × 0.30 ÷ 9 = 73.3 g.
Result: 165 g protein, 220 g carbohydrate, and about 73 g fat per day.
The calculator allocates the full calorie target among three macronutrients. A total above or below 100% would overstate or leave part of the calorie target unassigned.
They are not modeled separately here. If alcohol or special fiber accounting is important, the displayed macro calories may not exactly match food-label totals.
No. The appropriate amount depends on body weight, training, total calories, medical considerations, and preferences.
Fat contains more calories per gram. The same calorie share therefore produces fewer grams of fat.
Small day-to-day variation is normal. Many people find the weekly average and consistent overall intake more useful than exact daily matching.