Corn Yield Calculator

Count ears in a 1/1000-acre strip (17.4 ft of 30-in rows).
Average number of kernel rows around the ear.
Average number of kernels per row.
Biology

Estimate corn field yield in bushels per acre using the standard ear count method (kernels per ear and ears per 1/1000 acre).

Formula

Yield (bu/acre) = [ears/1000ac × (rows × kernels/row)] ÷ 90,000
  • The divisor 90,000 represents the average kernels per bushel × 1,000 scaling factor.
  • Standard corn bushel = 56 lbs; ~90,000 kernels.
  • Sample multiple locations in the field and average.

32 ears, 16 rows, 35 kernels

Inputs
  • Ears per 1/1000 Acre: 32
  • Rows per Ear: 16
  • Kernels per Row: 35

16 × 35 = 560 kernels/ear. 32 × 560 = 17,920. 17,920 ÷ 90,000 ≈ 199 bu/acre.

Frequently asked questions

How do I measure a 1/1000-acre strip?
In 30-inch rows, measure 17.4 ft along the row. Count all ears in that section.
How accurate is this method?
Within ±15–20% of actual harvest. Take multiple samples.