How to use the Carbohydrate Calculator
This tool turns a calorie target and carb share into grams of carbohydrate.
Open the Carbohydrate Calculator →
What you need to enter
- Daily calories
- Carbs as % of calories
The formula
Carbohydrate grams = calories × share ÷ 4.
Worked example
Using the default values in the calculator:
- Daily calories: 2200
- Carbs as % of calories: 45
| Daily carbohydrate | 248 g |
| Calories from carbs | 990 kcal |
| Recommended range (45–65%) | 248 – 358 g |
Tips for better results
- Dietary guidelines suggest 45–65% of calories.
- Choose whole grains, fruit and vegetables.
Common mistakes to avoid
- Counting only added sugar.
- Ignoring fibre.
Please note: Health calculators and guides give general estimates, not medical advice. Talk to a doctor or other qualified professional about your own health. See our Disclaimer.