Feedstock Carbon Intensity Calculator
Turn farm-level practices — tillage, nitrogen management, cover crops — into a feedstock carbon intensity value for the corn you grow, enroll or 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 across the 45Z credit chain, from the farm to the fuel producer — 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 practice data flows from the field to a fuel carbon intensity score without re-keying spreadsheets — whether you grow the crop, run the program or produce the fuel.
Turn farm-level practices — tillage, nitrogen management, cover crops — into a feedstock carbon intensity value for the corn you grow, enroll or 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 a 45Z calculation, with the same inputs, versioning and export formats.
Aggregate field-level scores into farm, program, supplier or facility results you can defend.
Downloadable PDF reports with inputs, tool versions and timestamps for your records.
Pull results into your farm management, program enrollment, ETRM or compliance system with a documented REST API.
Tax credits live and die on documentation. Open45Z is designed so that anyone — the grower, the program administrator, the producer, the auditor, the lender — can follow the math.
for every farmer, every program, every producer, every run.
Enter or upload farm-practice data — from growers, program enrollments or supplier records.
Run FD-CIC and T-DISC with a single request.
Inspect every intermediate value and flag exceptions.
Share clean records with growers, program partners, buyers and tax teams.
Send field, farm or facility data, get back scores with the full calculation trail. Use the web app for one-offs or the API for an entire program or supply book.
# illustrative example — final routes & fields will be in the docs curl -X POST https://api.open45z.com/calculate \ -H "Content-Type: application/json" \ -d ''
Farmers documenting practices, program implementers enrolling and verifying growers, and fuel producers (including ethanol plants) claiming the 45Z credit. Everyone works from the same transparent calculation.
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 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 the next season, program cycle or compliance filing.