Carbohydrate Calculator
Enter weight, activity level and goal to estimate daily carbohydrate intake (grams).
Input Data
Results
At a glance:Daily calories ~ weight(kg) * activity factor (sedentary 25 / light 30 / moderate 33 / active 37 / very active 40 kcal/kg); weight loss x0.8, gain x1.15. Carbs = calories * 50% / 4 (4 kcal per gram).
Formula
calories = weightKg * activityFactor * goalAdj.
carbG = calories * 0.5 / 4.
How to Use
- Enter weight, activity level and goal.
- Get daily calories and recommended carb grams.
Case Studies
65kg / moderate / maintain
calories = 65 * 33 = 2145 kcal; carbG = 2145*0.5/4 ~ 268 g.
FAQ
Why 50% of calories?
General guidelines suggest carbs make up 45-65% of calories; this tool uses the midpoint 50%.
Do athletes need more?
High-endurance athletes often need 5-8 g/kg; adjust upward per sports-nutrition guidance.
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References
Content reviewed by the Calculatorism editorial team. Results are for reference only; please refer to the relevant authorities for the official figures.