Corn Grain Yield Estimator

The Corn Grain Yield calculator estimates the amount of corn produced in a field based on the acres (a), the results of a 1,000^th acre sample including the number of ears in the  (ears), the size estimate of your sample kernels (s), the average kernels per ear (KPE) in your sample. 

INSTRUCTIONS: Enter the following information from your 1000th acre sample:

• (S) Choose size kernels [small, medium, large] (For more information, see Kernel Size description below.)
• (KPE) Average number of harvestable kernels per ear in your sample 
• (ears) Number of ears in your 1000^th acre sample.
• (a) Acres of corn.  Note: the default is 1 acre which will give you your bushels of corn per acre. You can then enter the number of acres you have in corn to provide the total estimated yield for your land.

CORN YIELD: The calculator returns an estimate of the bushels of corn for a the number of acres specified.  A more accurate Corn Yield Estimation is available in the CORN YIELD ESTIMATION CALCULATOR.  It has a step by step process and includes moisture corrections for a more accurate estimation of corn yield.  For a Simple Corn Yield, CLICK HERE.

The Math / Science

Note: the rounded ends of the head are not considered since the combine will often not collect those kernels.

To compute the length of a thousandth (1/1000^th) acre row, click HERE.

Corn Price Survey

The following information is provided for the convenience of the farmer.  It is based on publicly available sources and includes average yields by crop and state, and a price survey of corn, wheat and soybean in dollars per bushel.  Note: your yield will differ from the averages due to local conditions, and the price per bushel will be different due to quality of the crop and timing of when it's sold in the market.  Nonetheless, this data used in this calculator with your amount of land is a reasonable place to start.

Corn Yield per Acre by US State

The average acre of corn planted in the United States in 2020 yielded 172 bushels of corn (see below).   A farmer can compute a good estimation of corn yield while the corn is still standing based on a 1000^th acre row survey of their own field using their own acreage and a moisture correction factor.  The Corn Yield Estimation Calc walks through the process.   In the absence of a personal estimate, the U.S. Department of Agriculture provides statistics by state and year.  Note, current weather conditions greatly affect corn yield.

In the U.S. Department of Agriculture Crop Production 2020 Summary report, the following information on Yield per Acre

Kernel Size

Kernel size affect kernels per bushel:

• small kernels: 120000.0 1/bu 
• medium kernels: 90000.0 1/bu
• large kernels: 80000.0 1/bu

Corn Calculators:

• Corn Yield Estimation Calculator - Estimate the size of corn harvest (number of bushels) while the crop is still in the field based on a sample, acres planted and quality factors (kernel size and moisture).
• Crop Value Estimation - Estimate the value of a crop based on the acres planted, yield per acre and dollar per bushel.
• Corn Products - Estimates the amount of derivative products that can be produced based on a volume (number of bushels) of corn including: pounds of beef, pork and poultry, corn oil and ethanol.
• US Corn Pricing Survey - Regular survey of market prices of corn