Eating half a serving
16 g carbs · 2 g fiberMultiply both label values by 0.5.
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Carb calculator
Find the carbs in your portion from the numbers on a food label.
Which number should I enter?
Use “Total Carbohydrate” on the label. Fiber and sugars are already included, so do not add them again.
This is food-label math, not an insulin calculator. How to read a food label.
Turn a label into your portion
Suppose one serving lists 32 g of total carbohydrate and 4 g of fiber.
Eating 1.5 servings
48 g carbs · 6 g fiberMultiply both label values by 1.5.
On a US nutrition label, fiber is already included in total carbohydrate. Do not add it to the total again. Check that the serving size on your label matches the amount you enter.
Understand carbohydrate labels