FOODMANAC · KNOW YOUR NUMBERS
Macro Calculator
Compare balanced, high-protein, athlete and keto macro examples and convert your calorie budget into grams.
Your details
YOUR ESTIMATE
Start with your details
Enter your measurements to see the calculation and its assumptions.
Connect your numbers to real food
Search Foodmanac’s existing food database. Choose the correct preparation and compare its recorded nutrient basis with a portion you actually eat.
How to use this macro calculator
Presets help compare arithmetic choices. They are not clinically validated diets or sport-specific prescriptions. Keto falls outside the general carbohydrate reference range; the athlete label does not replace a training-specific fueling plan. Compare the protein result with the separate weight-based calculator.
Formula and assumptions
Grams = kcal × percentage ÷ 100 ÷ energy per gram (4 for carbohydrate/protein; 9 for fat). Carbohydrate/protein/fat splits: balanced 50/20/30; high protein 40/30/30; athlete 55/20/25; keto 5/25/70.
Example calculation
At 2,000 kcal with the balanced preset, the output is 250 g carbohydrate, 100 g protein and about 67 g fat.
Frequently asked questions
Will keto mode guarantee ketosis?
No. A percentage-based macro split cannot guarantee ketosis or suitability.
Why do rounded grams not sum perfectly to calories?
Display rounding can produce small differences; calculations use unrounded values internally.
Sources and methodology
Source-backed equations are distinguished from Foodmanac planning presets. No result is an exact measurement or a medical prescription. Content version: 1.0.0.
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- Carb Calculator
- Fat Intake Calculator
- TDEE Calculator
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