Corn Yield Calculator
Estimate corn yield before harvest using field ear counts and kernel counts. Enter ears, kernel rows and kernels per row to calculate an estimated yield in bushels per acre and compare yield potential across fields.
Corn Yield Calculator
Estimate bushels per acre from ears, kernel rows and kernels per row.
Important: Yield estimates are approximate. The yield-component method commonly uses 90,000 kernels per 56-lb bushel, but kernel weight varies substantially with hybrid and grain-fill conditions.
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How to Estimate Corn Yield Before Harvest
Yield estimates are most useful when samples represent the field. Count ears in several locations, avoid choosing only the best or worst areas and average the results. Kernel size and grain fill can still change before harvest, so treat any pre-harvest estimate as a range rather than a guarantee.
Why Kernel Weight Matters
Two ears with the same kernel count can produce different final yields because kernel size and density vary with hybrid, weather, plant stress and grain fill. The calculator provides a useful estimate, but actual harvested yield can differ.
Use Yield Estimates for Harvest and Input Decisions
A reasonable yield estimate can help with harvest planning, storage needs, crop-removal calculations and return-on-investment analysis. Recheck fields as harvest approaches if conditions change.
Frequently Asked Questions
When should I estimate corn yield?
Yield estimates are commonly made after pollination once kernels are developed enough to count, then refined as the crop approaches maturity.
How many locations should I sample?
Use several representative locations across the field. More representative samples generally produce a better field estimate.
Why can actual yield differ from the calculator?
Kernel weight, late-season stress, harvest loss and field variability can all change final harvested yield.
More Free Farm Calculators
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Want to Evaluate the Return on Your Crop Program?
Use your estimated yield with our ROI and crop-removal tools, or send your results to EZ Custom Ag for a field-specific discussion.
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