The carb calculator converts maintenance calories and a carb percent into daily carbohydrate grams.
How to use
- Enter profile and activity.
- Set carb percent of calories.
- Read carb grams; very low carb → keto calculator.
Example
2,000 kcal, 40% carbs → ~800 kcal → about 200 g/day (4 kcal/g).
More tools on the health hub. For planning reference only—not medical, nutrition, or obstetric advice.
Frequently asked questions
How many carb grams per day?
From maintenance × carb percent ÷ 4 (~4 kcal/g). In fat loss, cut total calories first, then adjust percents—extreme low carb needs supervision.
Low carb vs keto carbs?
“Low carb” varies; keto pushes carbs very low (~5% on our keto tool). Compare on the keto calculator or set your own percent here.
Vs the macro calculator?
The macro calculator sets all three macro percents; this page focuses on carb percent with even protein/fat reference splits.
Is this medical advice?
No—results are for planning reference only. See clinicians for pregnancy, pediatrics, cycle disorders, or sleep conditions. Do not rely on calendar math alone for contraception.