The American Coalition for Ethanol has created this online tool to help ethanol producers and corn producers estimate potential improvements in their carbon footprint, using real-world, up-to-date data.

We are not recording the data that you submit when using this calculator, however we do want to get a sense of who is using it. Please provide your name and email address to access the calculator.

Please Note: Refreshing or reloading this page will reset all fields to their default starting value. If you would like your data saved, please click the button at the bottom of the page to email the calculated data to yourself.

California GREET Midwest Average

Grams of CO2 equivalent GHGs per megajoule
2021 U.S. Department of Energy GREET Midwest Average

Grams of CO2 equivalent GHGs per megajoule
User Specified Carbon Intensity

Grams of CO2 equivalent GHGs per megajoule



How to use this calculator:

• Enter values into all yellow boxes below.
• All pre-populated User Specified Values are DoE GREET values.
Do not refresh the page while using the calculator. Refreshing the page will reset all values back to default.
• Use Tab key to move to the next box.

Yields - Corn, Ethanol & Energy

Carbon Credit $/ton$
Corn, Ethanol and Energy Yield California GREET
Default Value
Megajoules/acre DoE GREET
Default Value
Megajoules/acre User Specified Value Megajoules/acre Megajoules/bushel
166 178.4
(Enter Farm Average Corn Yield)
2.882 2.864
Enter Ethanol Plant Ethanol yield (gal/bu)
(from local Ethanol plant)
Ethanol Yield (gallons/acre) 478 38,528 511 41,147

Corn Farming Input Parameters

Corn Production Fuels & Emissions California GREET
Default Value
CI (g/MJ) DoE GREET
Default Value
CI (g/MJ) User Specified Value Biodiesel, Renewable Diesel, Ethanol % Blend Gram GHGs /gal, ft3, kWh CI (g/MJ) CI Change from GREET Default $/Gal.CI
Reduction Value
$/Acre CI
Reduction Value
4.9 1.54 7.22
2.13
12140
0 0 0
0
0 0 0
0
1.7 1.66 1.28
0.33
174.4 0.36 87
0.17
80
2.7 0.5 2.2
0.37
6965
17 0.21 69.3
0.74
439
Corn Production Energy Totals
4.25
3.74


Corn Transportation Fuel Emissions California GREET
Default Value
CI (g/MJ) DoE GREET
Default Value
CI (g/MJ) User Specified Value Biodiesel, Renewable Diesel % Blend g GHGs /bushel CI (g/MJ) CI Change from GREET Default $/Gal.CI
Reduction Value
$/Acre CI
Reduction Value
10 0.73 10
0.37
40 1.77 40
0.83
Corn Transportation Energy Totals
2.5
1.2


Nitrogen Fertilizer Manufacture and Transportation Emissions California GREET
Default Value
CI (g/MJ) DoE GREET
Default Value
CI (g/MJ) User Specified Value Gram GHGs per unit N Fertilizer CI (g/MJ) CI Change from GREET Default $/Gal.CI
Reduction Value
$/Acre CI
Reduction Value
43.4 2 49
1.71
1437
32.2 1.8 36.3
1.66
1886
2.8 0.3 3.2
0.24
3038
2.8 0.1 3.2
0.12
1588
44.8 3.5 50.5
3.27
2661
Nitrogen in MAP (11-52-0) Fertilizer (lbs.actual Units N/acre) 5.6 0.1 6.3
0.29
211
Nitrogen in DAP (18-46-0) Fertilizer (lbs. actual N/acre) 8.4 0.2 9.5
0.5
386
Nitrogen Totals 140.1
8.4
158
7.79
Units N/acre
Lbs./bushel
% Nitrogen Balance/N Use Efficiency (Applied Nitrogen Fertilizer divided by Nitrogen removed in grain protein) (corn grain dry matter X 10% X 16%)

Annual Precipitation, Enhanced Efficiency N (EEFs), and 4R (Right Form, Right Place Right Time, Right Rate) N Fertilizer Management impacts on Nitrous Oxide

Climate and N Management Factors Influencing N2O Emissions
N2O from Fertilizer and Crop Residue Nitrogen GREET 2021 Default N2O g/Mj by Fertilizer Source Precip. (inches) EEFs Fertilizer Form Application Placement Application Timing Total N Rate N2O g/Mj CI Change from GREET Default $/Gal.CI
Reduction Value
$/Acre CI
Reduction Value
Anhydrous Ammonia (NH3)
3.09
Am.
In Soil
a
b
c
Granular Urea
2.29
Am.
Ammonium Nitrate
0.2
50-50
Ammonium Sulfate (AMS)
0.2
Am.
Urea Ammonium Nitrate Solutions
3.19
75-50
Nitrogen in Phosphate Fertilizer (MAP & DAP)
1
Am.
Total N2O from Nitrogen Fertilizer (g/Mj)
9.97
Precip. C:N Ratio Total Nitrogen Fertilizer N2O
Total N2O From Crop Residue (g/Mj)
3.23
< 25 Total Corn Residue Nitrogen N2O
Total N2O (g/Mj)
13.2
Total N2O


Phosphate Fertilizer Manufacture & Transportation Emissions California GREET
Default Value
CI (g/MJ) DoE GREET
Default Value
CI (g/MJ) User Specified Value Gram GHGs per unit P2O5 CI (g/MJ) CI Change from GREET Default $/Gal.CI
Reduction Value
$/Acre CI
Reduction Value
26.5 0.42 29.6
0.72
999
52.6 0.55 29.6
0.59
826
0 0 0
0
920
Phosphate Totals - Units P2O5 per acre 79.1
0.97
59.2
1.31


Potash Fertilizer Manufacture & Transportation Emissions California GREET
Default Value
CI (g/MJ) DoE GREET
Default Value
CI (g/MJ) User Specified Value Gram GHGs per unit K2O CI (g/MJ) CI Change from GREET Default $/Gal.CI
Reduction Value
$/Acre CI
Reduction Value
53.6
0.47
59.9
0.36
245


Lime for Soil pH Correction – Manufacture & Transportation Emissions California GREET
Default Value
CI (g/MJ) DoE GREET
Default Value
CI (g/MJ) User Specified Value Gram GHGs per lb CaCO3 CI (g/MJ) CI Change from GREET Default $/Gal.CI
Reduction Value
$/Acre CI
Reduction Value
472.2 0.058 573
0.06
0.02431
     Soil CO2 emissions due to Lime use
1.38
1.37
0.52612
1.37


Herbicide Manufacture & Transportation Emissions California GREET
Default Value
CI (g/MJ) DoE GREET
Default Value
CI (g/MJ) User Specified Value Gram GHGs per lb Herbicide CI (g/MJ) CI Change from GREET Default $/Gal.CI
Reduction Value
$/Acre CI
Reduction Value
2.14
0.52
2.3
0.47
8420


Insecticide Manufacture & Transportation Emissions California GREET
Default Value
CI (g/MJ) DoE GREET
Default Value
CI (g/MJ) User Specified Value Gram GHGs per lb Insecticide CI (g/MJ) CI Change from GREET Default $/Gal.CI
Reduction Value
$/Acre CI
Reduction Value
0.0046
0.001
0.0049
0.0012
9938

Credit for Soil Organic Carbon Sequestration

ACE is working with the Department of Energy to include a soil organic credit, which is not currently part of GREET.

Michigan State University Cropland GHG Calculator
County Specific SOC Sequestration for Corn
This input determined by using the Michigan State University Cropland GHG Calculator.

Go to this web address: http://surf.kbs.msu.edu
(Calculator opens in a new tab. To return to this page, either close the MSU tab or click on the ACE tab at the top of your browser.)

1 Locate and click on your county on the interactive map.

2 Enter your crop.

3 Enter your yield.

4 Enter your tillage method.

5 Record the number under 'Soil' and enter that number in the yellow box below.


Your results will be shown in Grams/Megajoule in green.


Metric tons CO2/acre g/MJ $/Gal.CI
Reduction Value
$/Acre CI
Reduction Value

SUBTOTAL: Upstream Corn Production Totals California GREET Default Value
33.3
DoE GREET Default Value
29.3
User Specified Value

Ethanol Plant Energy Use

Ethanol Plant Energy Use
(California GREET & DoE GREET 2021 Midwest Average values from Industry Surveys)
California GREET
Default Value
CI (g/MJ) DoE GREET
Default Value
CI (g/MJ) User Specified Value Grams /gallon CI (g/MJ) CI Change from GREET Default $/Gal.CI
Reduction Value
$/Acre CI
Reduction Value
28408
25.7
24628
22.2
NA
0.89
2.8
0.63
2.95
NA
28.4
25.2
Electricity Grid CI Multiplication Factor
NA

Ethanol Plant Chemical Manufacture & Transportation Emissions

Ethanol Plant Chemical Manufacture & Transportation Emissions
(California GREET & DoE GREET 2021 Midwest Average values from Industry Surveys)
California GREET
Default Value
CI (g/MJ) DoE GREET
Default Value
CI (g/MJ) User Specified Value Grams /gallon CI (g/MJ) CI Change from GREET Default $/Gal.CI
Reduction Value
$/Acre CI
Reduction Value
330
0.047
330 0.047
NA
710 0.46 710
0.46
NA
360 0.092 360
0.092
NA
554 0.003 554
0.003
NA
2123 0.59 2123
0.59
NA
2663 0.65 2663
0.65
NA
1270 0.17 1270
0.17
NA
0 0 0
0
NA
Ethanol Plant Chemical Total
2.01
2.01
NA

Ethanol Transportation Emissions

Ethanol Transportation Emissions
(California GREET values for Midwest Ethanol to California, GREET 2021 values for Midwest Ethanol, User Specified for Ethanol consumed)
California GREET
Default Value
(to California)
CI (g/MJ) DoE GREET
Default Value
(U.S. Average)
CI (g/MJ) User Specified
Values for
Your Specific Destinations
Grams /gallon CI (g/MJ) CI Change from GREET Default $/Gal.CI
Reduction Value
$/Acre CI
Reduction Value
Ethanol Plant to Bulk Terminal Miles Miles % Miles %
      0 0 520 13.2%
0.12
%
NA
      1400 1.51 800 78.9%
0.68
%
NA
      80 0.44 80 7.9%
0.03
%
NA
Bulk Terminal to Refueling Station
      90 0.49 30 100%
0.16
100%
NA
Ethanol Transportation Totals
2.44
1
NA

Denaturant Use Emissions

Denaturant Use Emissions California GREET
Default Value
CI (g/MJ) DoE GREET
Default Value
CI (g/MJ) User Specified Value Grams /gallon CI (g/MJ) CI Change from GREET Default $/Gal.CI
Reduction Value
$/Acre CI
Reduction Value
2%
0.9
2%
1.2
%

SUBTOTAL: Ethanol Plant Energy, Chemicals, Transportation & Denaturant

$/Gal.CI
Reduction Value
$/Acre CI
Reduction Value
Ethanol Plant Energy, Chemicals, Transportation & Den.
33.78
29.4

Co-Product Credits

Midwest average GREET Source: RFA Industry Survey (US Dry Mills)

Co-Product Credits California GREET
Default Value
CI (g/MJ) DoE GREET
Default Value
CI (g/MJ) User Specified Value CI (g/MJ) CI Change from GREET Default $/Gal.CI
Reduction Value
$/Acre CI
Reduction Value
4 -9.2
3.25
-7.66
NA
1.2 -4.8
1.36
-3.2
NA
0.2 0 0.27
0
NA
Co-Product Credit Totals 5.3
-14
4.9
-10.86
NA

International and Domestic Land Use Change Penalty

This penalty includes emissions from soil organic carbon losses and N2O emissions.

CI Change from GREET Default $/Gal.CI
Reduction Value
$/Acre CI
Reduction Value
Indirect Land Use Change CARB 2015
19.8
GREET CCLUB 2021
7.38
User option of GREET default or most recent CCLUB factor of 3.71

Credit for Carbon Capture and Sequestration

Based on 2020 USDA report, this value results in an approximately 25 gram credit.

$/Gal.CI
Reduction Value
$/Acre CI
Reduction Value

Grand Totals

CI Change from GREET Default $/Gal.CI
Reduction Value
$/Acre CI
Reduction Value
User Specified Carbon Intensity  
-3.2


Reset Values to Default
Share my data with ACE      



Notes & Sources:

This Calculator borrows heavily from the U.S. Department of Energy GREET Model and the GREET 2020 Corn Feedstock Carbon Intensity Calculator