Carbs Calculator

Work out daily carbohydrate grams from a calorie target and your chosen carb percentage.

Usage Tip

Favour whole-food carbohydrate sources for steadier energy and more fibre.

Daily Carbs
g/day
Carbohydrate in grams
THE MATH
carbs (g) = calories × carb% ÷ 4
Carbohydrate provides 4 kcal per gram.
Carbohydrate needs vary with activity; endurance training calls for more.
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The calculators and tools on Formula Factory are provided for general guidance and informational purposes only. Results are estimates based on standard formulas and the values you enter — they do not constitute professional engineering, electrical, or architectural advice. Always verify calculations with a qualified professional before making decisions for any safety-critical, code-compliance, or commercial application. Formula Factory makes no representations or warranties as to the accuracy or completeness of any result, and accepts no liability for errors, omissions, or any outcomes arising from reliance on this information.