Net Carbs from Label Calculator

About this calculator

Net carbs is a widely used low-carb and keto community concept calculated as total carbohydrates minus fiber minus sugar alcohols (with some methods only subtracting half of certain sugar alcohols like maltitol, since they are partially absorbed), based on the idea that fiber and most sugar alcohols have minimal impact on blood glucose and insulin response compared to digestible carbohydrates.

People following ketogenic or low-carb diets track net carbs rather than total carbs because it more closely reflects the carbohydrate load that actually affects blood sugar and can kick someone out of ketosis, and many low-carb packaged foods advertise their 'net carbs' prominently on the label for exactly this reason. It's worth noting net carbs is a community convention, not an FDA-regulated label term in the US, and sugar alcohol absorption varies by type, so the calculation is a useful estimate rather than an exact physiological measure.

This calculator takes the total carbs, fiber, and sugar alcohols listed on a nutrition label, then returns the net carb count, so you can track your actual carb intake against a keto or low-carb daily target.