Corn Seeding Rate Calculator
Enter your target plant population, germination rate, and expected field emergence to get the seeds-per-acre seeding rate for corn.
Field Parameters
Typical range: 28,000–38,000 plants/acre
From seed bag tag — typically 95–98%
Ideal conditions: 90–95% | Stressed: 80–85%
Standard bag = 80,000 seeds
Results
Enter field parameters and click Calculate.
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Seeds per Acre
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Bags per Acre
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Total Seeds Needed
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Total Bags Needed
Formula Breakdown
Quick Reference — Seeds/Acre by Population
Assumes 96% germination, 90% field emergence
| Target (plants/ac) | Seeds/Acre | Bags/Acre |
|---|
Summary
Enter your target plant population, germination rate, and expected field emergence to get the seeds-per-acre seeding rate for corn.
How it works
- Enter your target final plant population (plants per acre at harvest).
- Enter the germination percentage from the seed bag tag.
- Enter the expected field emergence rate as a percentage (accounts for soil, planting depth, pests, and other field losses).
- Optionally enter total acres to calculate total seeds and bags required.
- The calculator divides target population by germination and emergence fractions to get seeds per acre, then divides by 80,000 seeds per bag to get bag count.
Use cases
- Determine seeds per acre before purchasing corn seed.
- Adjust planting rate when using seed with lower-than-average germination.
- Account for poor field conditions that reduce emergence (cold soils, crusting, pest pressure).
- Estimate total bags needed for a multi-field planting plan.
- Compare seeding rates for irrigated vs. dryland fields with different emergence expectations.
- Plan seed inventory so you order the right amount before the season.
Frequently Asked Questions
Last updated: 2026-07-01 ·
Reviewed by Nham Vu