🌽 Corn Yield Calculator
Use field samples to estimate bushels per acre before harvest and plan marketing decisions.
Number of rows included in the sample length.
Average kernels per ear after removing butt and tip kernels.
Standard assumption ≈ 0.00025 lb per kernel (80,000 kernels per bushel).
How to Use This Calculator
Pull representative samples
Walk random sections of the field and count ears in a defined row length.
Count kernels per ear
Average kernel counts from several ears—omit aborted or damaged portions.
Adjust for moisture
Enter field moisture and target storage moisture to get market-ready yield.
Formula
Yield (bu/ac) = Ear Count × Kernels/Ear ÷ Kernels per Bushel × Moisture Adjustment
Kernels per bushel is typically 80,000 at 15.5% moisture. Adjust kernel weight for hybrid differences or stress conditions.
Full Description
Pre-harvest yield estimates guide marketing, storage, and logistics decisions. Sampling multiple field locations reduces variability caused by soil type or moisture differences.
Pair yield estimates with grain moisture readings and crop scouting data to fine-tune harvest timing and drying needs.
Frequently Asked Questions
How accurate is the kernel-weight method?
It provides reasonable estimates but can vary ±10% depending on kernel size and stress.
What if rows are 20 inches apart?
Enter actual row spacing—the calculator adjusts population accordingly.
Should I sample multiple locations?
Yes. Take at least 3–5 samples across the field for a representative average.
Can I use drone imagery?
Aerial imagery highlights variability. Combine with on-the-ground counts for precise estimates.