Feedstock Carbon Intensity Calculator
Turn farm-level practices — tillage, nitrogen management, cover crops — into a feedstock carbon intensity value for the corn you buy, with each assumption surfaced next to the number it produced.
An open application and API that runs the USDA FD-CIC and T-DISC tools inside your 45Z credit workflow — every input, every factor, every result visible and reproducible. No license. No paywall. No black box.
Open45Z wraps the USDA calculators your 45Z paperwork depends on, so feedstock data flows from the field to your fuel carbon intensity score without re-keying spreadsheets.
Turn farm-level practices — tillage, nitrogen management, cover crops — into a feedstock carbon intensity value for the corn you buy, with each assumption surfaced next to the number it produced.
Run T-DISC alongside FD-CIC in the same session and carry its outputs straight into your 45Z calculation, with the same inputs, versioning and export formats.
Aggregate supplier-level feedstock scores into a facility-level result you can defend.
One-click CSV and JSON bundles with inputs, tool versions and timestamps for your records.
Pull results into your ETRM, LIMS or compliance system with a documented REST API.
Tax credits live and die on documentation. Open45Z is designed so that anyone — your team, your auditor, your lender — can follow the math.
for every ethanol producer, every plant, every run.
Upload supplier and farm-practice data, or enter it directly.
Run FD-CIC and T-DISC with a single request.
Inspect every intermediate value and flag exceptions.
Hand clean records to your tax and compliance team.
Send feedstock and facility data, get back scores with the full calculation trail. Use the web app for one-offs or the API for the whole supply book.
# illustrative example — final routes & fields will be in the docs curl -X POST https://api.open45z.org/v1/calculate \ -H "Content-Type: application/json" \ -d '{ "tools": ["fd-cic", "t-disc"], "feedstock": "corn", "county": "Story, IA", "practices": { "tillage": "no-till", "cover_crop": true } }'
Yes. There is no subscription, per-run fee or paid tier for the core application and API.
No. Open45Z is an independent project that runs publicly available USDA tools. It is not affiliated with or endorsed by USDA, the Treasury Department or the IRS.
No. Results support your 45Z documentation, but eligibility and filing positions should be confirmed with your tax advisor and current Treasury guidance.
Your inputs are used only to run the calculations you request. Data handling details will be published in plain language alongside the source code.
Free, open and ready for your next compliance cycle.