Net Carbs, Explained
Net Carbs Calculator
Search a food to see its total carbs, fiber, and net carbs (total carbs minus fiber), each one labeled with the exact database it came from — USDA FNDDS, USDA SR Legacy, USDA Branded, or Open Food Facts. Every number is pulled straight from that source, never estimated.
Don’t see your food? Enter it manually
Type the numbers straight off a nutrition label — the calculator does the subtraction.
Embed this calculator
Drop this on your own site — no signup, no styling required. It links back to this page.
<iframe
src="https://twentygrams.app/net-carbs/calculator/embed/"
width="100%"
height="480"
style="border:1px solid #e3ddd3;border-radius:12px;max-width:480px"
title="Net Carbs Calculator by TwentyGrams"
loading="lazy"
></iframe>Where these numbers come from
Every food above traces back to a named USDA dataset or Open Food Facts — the same sourced database that powers the TwentyGrams app, filtered to a curated subset of common foods for this page. Net carbs is always computed the same way: total carbs minus fiber. Nothing here is AI-estimated.Read the full breakdown of how we source and verify every number →