Flagship guide · Official tool

USDA's FD-CIC Calculator: An Independent Guide

Understand the USDA's FD-CIC calculator before entering field records or relying on a commercial estimate.

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The USDA's FD-CIC (Feedstock Carbon Intensity Calculator) is an official calculator used to estimate the carbon intensity of eligible agricultural biofuel feedstocks from defined farm, crop, practice, nutrient, and yield information. FDCIC.com is independent and is not the USDA tool. A private calculator may organize records or reproduce calculations, but it should identify its version and show how its result reconciles to the official USDA's FD-CIC calculator.

01What the calculator is — and is not
02The input map
03Required, permitted, and optional are different
04Common mistakes
05A practical workflow
By FDCIC EditorialReviewed August 20, 2026Status: Resource preview