Net Carbs
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
Total - Fibra - Álcool
About this calculator
The net carbs calculator helps determine the actual carbohydrate amount your body metabolizes, crucial for diets like keto. The formula is straightforward: subtract fiber and alcohol content from total carbohydrates. This accounts for the fact that fiber and alcohol are not absorbed by the body, affecting blood sugar less.
Use this tool when analyzing food labels or planning meals. For example, a food with 10g total carbs and 6g fiber has 4g net carbs. Confusing total carbs with net carbs is common and may disrupt ketosis tracking.
Note: not all products list fiber and alcohol separately. If unsure, check the packaging or consult a nutritionist. Net carbs don't represent full nutritional value, so they shouldn't replace comprehensive diet analysis.
Frequently asked questions
What are net carbs?
They are carbs absorbed by the body, calculated by subtracting fiber and alcohol from total carbs.
Should I subtract fiber and alcohol if the product doesn't list them?
No. Only subtract what's explicitly listed on the label.
Why are net carbs important for keto?
Because they show the real impact on blood sugar, crucial for maintaining ketosis.
Are all types of fiber subtracted?
Only dietary fiber listed in the nutrition facts counts. Soluble or insoluble fiber is treated equally.