Carbohydrate Calculator
Convert calories and carbohydrate percentage to grams, or grams back to calories and percentage.
Enter or adjust the values above, then calculate.
Carbohydrate: carbs in Grams from Calories
Convert calories and carbohydrate percentage to grams, or grams back to calories and percentage.
Inputs this tool uses
- Daily calories
- Calories from carbohydrate
What you get
45% of 2200 kcal.
How to use the Carbohydrate Calculator
- Enter daily calories, calories from carbohydrate.
- Select any method, activity level or option shown on this page, then choose Calculate.
- Read the main result together with the supporting values, method, assumptions and limitations below before using the estimate.
How this calculation works
Macronutrient energy uses 4 kcal/g for protein, 4 kcal/g for carbohydrate, 9 kcal/g for fat and 7 kcal/g for alcohol when entered.
Example calculation
The sample values loaded into the calculator produce 248 g/day. This example exists to show how the output is structured; replace the sample values with your own inputs for your calculation.
Assumptions and limitations
- Energy and nutrient outputs are estimates or general reference values, not individualized treatment targets.
- Adult calorie-goal tools should not be used for children, pregnancy or medical nutrition therapy unless the page explicitly supports that life stage.
Sources and review status
Source set last verified 2026-09-25. No clinician review is claimed unless a real named reviewer is displayed.
Connected tools
Continue with the closest related calculation without re-entering sensitive values automatically.
Convert daily calories and macro percentages into protein, carbohydrate and fat grams with sum validation.
Open tool →◐Protein CalculatorEstimate a general protein range from body weight and activity/goal assumptions without disease-specific advice.
Open tool →◐Fat Intake CalculatorConvert calories and fat percentage to grams, or fat grams back to calories and percentage.
Open tool →