Carb Calculator
Calculate your daily carbohydrate intake based on calorie needs and dietary preference — standard, low-carb, or ketogenic.
About this tool
Calculate how many carbohydrates you should eat per day based on your calorie needs. Supports standard, low-carb, and ketogenic diet plans with personalized recommendations and a visual macro breakdown.
How to use it
Quick steps to get the most out of this utility.
- 1
Choose your calorie source
Use TDEE calculation (enter age, sex, height, weight, activity) or enter your daily calorie target manually.
- 2
Select your diet profile
Pick Standard, Low-Carb, or Keto to set your carbohydrate percentage range.
- 3
Review your results
See your total daily carbs, net carbs (for keto), fiber target, and full macro breakdown with visual progress bars.
How carb recommendations are calculated
This calculator determines your carbohydrate needs in two ways. In TDEE mode, it first estimates your Basal Metabolic Rate using the Mifflin-St Jeor equation, then applies an activity multiplier to get your Total Daily Energy Expenditure. In manual mode, you enter your calorie target directly.
Once calories are established, the calculator applies the selected diet profile percentage: Standard (50%), Low-Carb (30%), or Keto (7.5%). These represent the midpoint of each range for balanced calculation. Carbs are valued at 4 kcal per gram, which is used consistently across all diet plans.
For keto users, net carbs are displayed as total carbohydrates minus fiber, which is the more relevant metric when following a strict low-carb diet. Fiber is also separately recommended at 14g per 1000 calories consumed — a general guideline that supports digestive health and satiety.
Frequently asked questions
How many carbs should I eat per day?+
It depends on your goals and activity level. For a standard balanced diet, 45–55% of total calories from carbs is common — roughly 225–330g for a 2000 calorie diet. Athletes or very active people may need more. Always consult a healthcare provider for personalized advice.
What is the difference between total carbs and net carbs?+
Total carbs include all carbohydrate types — starch, sugar, and fiber. Net carbs equal total carbs minus fiber, and are commonly used in ketogenic diets because fiber has minimal impact on blood sugar and ketosis.
Is low-carb the same as keto?+
No. Low-carb typically means 25–35% of calories from carbs (about 125–175g on a 2000 calorie diet), while ketogenic diets restrict carbs to 5–10% (about 25–50g) to induce ketosis. Keto is a subset of low-carb with a much stricter carb limit.
How is fiber recommendation calculated?+
This calculator uses the general guideline of 14g of fiber per 1000 calories consumed. For example, a 2000 calorie diet would target approximately 28g of fiber per day, which aligns with general dietary recommendations.
Do I need to count carbs exactly?+
For most people, aiming for a range rather than precise counting is sufficient. If you have specific goals like weight loss, diabetes management, or athletic performance, more precise tracking may be helpful. A registered dietitian can help you find the right approach.
What foods should I avoid on a low-carb diet?+
High-sugar foods, refined grains, starchy vegetables (potatoes, corn), legumes, and sugary beverages are typically limited. Focus on non-starchy vegetables, quality proteins, and healthy fats while monitoring total carbohydrate intake.
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