Carbs Per Serving Calculator
Total carb / servings + net carbs (carbs − fiber). Critical for keto, diabetes management.
Result
Loading calculator…
—
How to use this calculator
- Sum total carbs and fiber from ingredients.
- Add sugar alcohols if applicable.
- Set servings.
- Read total + net per serving.
About this calculator
Total carbs vs. net carbs: total = all carbohydrates including fiber. Net = total minus fiber minus half of sugar alcohols (FDA convention used by keto trackers). Strict keto: <20-25g net carbs/day. Lazy keto: <50g. Standard low-carb: <100g. The FDA Daily Value reference is 275g/day on a 2,000 kcal diet (55% of calories from carbs). For diabetics, dividing carbs evenly across meals (45-60g/meal) helps blood-sugar control.
Frequently asked
Why subtract fiber for "net"?+
Fiber isn't absorbed/metabolized like sugar/starch — it doesn't spike blood sugar. Net carbs better reflects glycemic load.
Why half sugar alcohols?+
Erythritol passes through unmetabolized (count 0); xylitol/sorbitol partially. FDA convention: ½ count is the safe rule of thumb.
Are oats carbs OK?+
Oats: high total carbs (~28g/40g serving) but high fiber (4g) — net 24g. Slow-digesting, won't spike like white bread.
What's a "carb gram" in cooking?+
All starches and sugars. White flour: ~76g/100g. Cooked rice: ~28g/100g. Potatoes: ~17g/100g. Banana: ~23g/100g.
Glycemic index vs. carbs?+
Different concepts. Total carbs = how much. GI = how fast it spikes blood sugar. Both matter; net carbs is the cleaner everyday metric.
Related calculators
Macros Per Serving Calculator
Protein / carbs / fat per serving from recipe totals; verifies kcal sum (P×4 + C×4 + F×9).
Calories Per Serving Calculator
Recipe total calories / number of servings = kcal per serving.
Fiber Per Serving Calculator
Total fiber / servings. Compare to FDA daily reference (25 g women, 38 g men).
Sugar Per Serving Calculator
Total added + natural sugars / servings. Compare to AHA daily limit (25g women, 36g men).
Protein Per Serving Calculator
Total protein / servings = grams per serving. Compare to body-weight-based daily target.
Sodium Per Serving Calculator
Total sodium mg / servings. Compare to FDA upper limit (2,300 mg/day).