Grain Weight Calculator
Convert bushels to actual weight and adjust to standard market moisture.
Results
How to Use This Calculator
Enter the required input values in the form fields above. Each field includes default values that you can adjust to match your specific situation. Click the Calculate button (or simply change any input) to see instant results. Use the Metric/Imperial toggle to switch between unit systems. Results are displayed in the results panel and can be used for farm planning and decision-making.
About This Tool
This calculator is designed to help farmers, agronomists, and agricultural students make quick, accurate calculations for farm management. It uses standard agricultural formulas based on extension service recommendations and scientific literature. Whether you are planning inputs, estimating yields, or managing finances, this tool provides reliable estimates to support your decisions.
Applicability: Relevant for grain storage operations in North America and Europe.
How the Calculation Works
Weight (lb) = bushels × test weight (lb/bu). kg = lb × 0.4536. Short tons = lb ÷ 2,000. Standard-moisture weight = Weight × (100 − actual moisture) ÷ (100 − standard moisture). Standard moistures: corn 15.5%, soybeans 13%, wheat 13.5%.
Real-World Example
5,000 bu at 56 lb/bu = 280,000 lb = 127,006 kg = 140 tons. At 18% moisture vs 15.5% standard: adjusted weight = 280,000 × (82 ÷ 84.5) = 271,716 lb.
Common Mistakes & Tips
Common mistakes: using a standard 56 lb/bu without measuring actual test weight; confusing short tons (2,000 lb) with metric tonnes (2,204.6 lb); forgetting moisture adjustment; mixing up bushel weights for different commodities.
Reviewed by Agricalc Editorial Team — Agricultural engineers and agronomists with 10+ years of field experience. Our team verifies every calculator formula against peer-reviewed extension publications. For site-specific advice, consult your local agronomist.
References
- USDA AMS — Grain Grades & Weight Standards
- UMN Extension — Grain Handling & Weight
- FAO — Grain Storage Weight Guidelines
Frequently Asked Questions
What is test weight?
Test weight is the density of grain, measured in pounds per bushel. It varies with variety, maturity, growing conditions and moisture. Standard test weight for No. 2 corn is 54 lb/bu; No. 1 is 56 lb/bu.
Why adjust to standard moisture?
Wet grain weighs more but that extra weight is water, not saleable grain. The market pays on dry matter at standard moisture (corn 15.5%, soybeans 13%, wheat 13.5%).
What is a short ton?
A short ton is 2,000 lb. A metric tonne is 2,204.6 lb (1,000 kg). Be sure which unit your elevator uses before comparing prices.
Does test weight affect bushel count?
Yes. Elevators often discount grain below standard test weight. Lower test weight means fewer saleable bushels even though the physical weight is the same.
How do I measure test weight?
Use a official test weight per Winchester bushel vessel (1.244 cu ft) or a moisture/test weight meter. Take multiple samples across the load for an accurate average.
