Grain Quality Discount Calculator
Dockage from moisture, test weight, and damage.
Inputs
%
%
%
Results
Total discount ($/bu)
0.09
Adjusted price ($/bu)5.91
Moisture discount ($/bu)0.05
Test wt discount ($/bu)0.04
Shrink factor0.99
How to Use This Calculator
- Enter Moisture percentage at delivery (corn base: 15%), Test Weight in lb/bu (corn base: 56).
- Enter Damage percentage and Foreign Material percentage from the grain grader.
- Enter the Base Price for #2 grade grain at the elevator.
- Review Total Discount Per Bushel and the Adjusted Price after all quality dockages.
- Check Shrink Factor to understand actual weight reduction from drying to base moisture.
How the result changes with Test weight (lb/bu)
| Test weight (lb/bu) | Total discount ($/bu) |
|---|---|
| 34 | 0.49 |
| 44 | 0.29 |
| 56 | 0.05 |
| 66 | 0.05 |
What each input means
- Moisture %
- Grain moisture at delivery (base: 15% for corn).
- Test weight (lb/bu)
- Test weight in pounds per bushel (corn base: 56).
- Damage %
- Percentage of damaged kernels.
- Foreign material %
- Percentage of foreign material.
- Base price ($/bu)
- Posted elevator price for #2 grade.
What each result means
- Total discount ($/bu)
- Total quality dockage per bushel.
- Adjusted price ($/bu)
- Net price after all quality discounts.
- Moisture discount ($/bu)
- Discount for excess moisture.
- Test wt discount ($/bu)
- Discount for low test weight.
- Shrink factor
- Weight reduction factor for drying to base moisture.
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersMoisture % = 16, Test weight (lb/bu) = 54, Damage % = 2, Foreign material % = 1 = 5 input(s) provided
- Calculate Total discountTotal discount = round((moistureDiscount + testWeightDiscount + damageDiscount + fmDiscount) *...0.09 = 0.09
- Calculate Adjusted priceAdjusted price = round((basePrice - totalDiscount) * 10000) / 100005.91 = 5.91
- Calculate Moisture discountMoisture discount = round(moistureOver * 0.05 * 10000) / 100000.05 = 0.05
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