Calculadora de Carboidratos
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
g = (kcal × %) / 4
About this calculator
The Carbohydrate Calculator helps you determine how many grams of carbohydrates to consume per day based on your total calories and desired carbohydrate percentage. It uses the formula: grams = (total calories × carbohydrate percentage) / 4, since each gram of carbohydrate provides 4 kcal. It is a simple tool for meal planning, whether for weight loss, muscle gain, or maintenance.
To use the calculator, enter your total daily calories (e.g., 2,000 kcal) and the desired carbohydrate percentage (usually between 45% and 65% for balanced diets). The result shows the recommended grams of carbohydrates. For example, for 2,000 kcal with 50% carbohydrates: (2000 × 0.5) / 4 = 250 g of carbohydrates per day.
This calculator is useful for people following specific diets, such as low-carb, ketogenic, or for athletes needing to adjust macronutrient intake. Remember that individual needs vary by age, sex, physical activity level, and health goals. Consult a nutritionist for personalized recommendations.
Caution: the carbohydrate percentage should be based on nutritional guidelines, not fads. Very low values may cause lack of energy, while very high values may lead to blood sugar spikes. The calculator provides an estimate; adjustments may be necessary based on your body's response.
Frequently asked questions
What carbohydrate percentage should I use?
For a balanced diet, 45% to 65% of total calories is recommended. Low-carb diets use less than 40%, and ketogenic diets less than 10%.
Does the calculator work for low-carb diets?
Yes, you can enter any percentage, including low values like 20% or 30%, typical of low-carb diets.
Do I need to know my total calories first?
Yes, the calculator requires total daily calories. You can obtain them from other calculators or estimates based on your energy expenditure.
Is the result daily or per meal?
The result is the total amount of carbohydrates for the entire day. Divide by the number of meals to know per portion.
Net carbs or total carbs?
The calculator considers total carbohydrates. For net carbs, subtract fiber, but this is not done automatically.