Grain Yield Estimation Dashboard
Instant multi-crop field calculation formulas
Measure out that exact length along a single row to capture a 1/1000th acre sampling area.
Count only ears capable of passing cleanly through the combine header mechanism.
Count the clean rows around the center cob body (typically an even integer between 12 and 20).
Excludes extreme tip or butt kernels; count full complete rings around the cob.
Factor 85: Represents standard central Corn Belt filling conditions (~85,000 kernels/bu). Use 75 for plump kernels, 95+ for drought/heat stress layout.
Estimated Corn Yield
156.8
Bushels per Acre (at 15.5% Moisture)
How to Use the Multi-Crop Yield Calculator
To get an accurate yield estimate, avoid sampling edge rows, which tend to skew averages higher due to greater sunlight exposure. Walk at least 50 paces into the bulk field area before taking counts.
Figuring Corn Yield (Yield Component Method)
- Our calculator uses the University of Illinois yield framework.
- Measure exactly 17 feet 5 inches of row (for standard 30-inch rows) to sample 1/1,000th of an acre.
- Count harvestable ears, then sample every fifth ear to average the kernel rows and kernels per row.
Estimating Soybean Yields (The 21-Inch Rule)
- For soybeans, we use the simplified 1/10,000-acre row method developed by Purdue University Extension agronomists.
- Regardless of your spacing, checking a 21-inch length provides an incredibly fast field-count validation model without counting full plant populations.