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U.S. wheat standards |
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Every wheat buyer has the ability to designate the quality specifications for the wheat they want.
Wheat Grades and Grade Requirements Table
| Grading Factors | Grades U.S. Number |
| Minimum pound limits: | 1 | 2 | 3 | 4 | 5 |
| Test Weight (lbs/bu): |
| HRS or White Club Wheat | 58.0 | 57.0 | 55.0 | 53.0 | 50.0 |
| All other classes and subclasses | 60.0 | 58.0 | 56.0 | 54.0 | 51.0 |
| Test Weight (kg/hl): |
| HRS or White Club Wheat | 76.4 | 75.1 | 72.5 | 69.9 | 66.0 |
| Durum | 78.2 | 75.6 | 73.0 | 70.4 | 66.5 |
| All other classes and subclasses | 78.9 | 76.4 | 73.8 | 71.2 | 67.3 |
| Maximum percent limits: | 1 | 2 | 3 | 4 | 5 |
| Defects: |
| Damaged kernels - Heat (part of total) | 0.2 | 0.2 | 0.5 | 1.0 | 3.0 |
| Damaged kernels - Total | 2.0 | 4.0 | 7.0 | 10.0 | 15.0 |
| Foreign material | 0.4 | 0.7 | 1.3 | 3.0 | 5.0 |
| Shrunken and broken kernels | 3.0 | 5.0 | 8.0 | 12.0 | 20.0 |
| Total 1/ | 3.0 | 5.0 | 8.0 | 12.0 | 20.0 |
| Wheat of Other Classes: 2/ |
| Contrasting classes | 1.0 | 2.0 | 3.0 | 10.0 | 10.0 |
| Total 3/ | 3.0 | 5.0 | 10.0 | 10.0 | 10.0 |
| Stones | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Maximum count limits: | 1 | 2 | 3 | 4 | 5 |
| Other material (1000 gram sample): |
| Animal filth | 1 | 1 | 1 | 1 | 1 |
| Castor beans | 1 | 1 | 1 | 1 | 1 |
| Crotalaria seeds | 2 | 2 | 2 | 2 | 2 |
| Glass | 0 | 0 | 0 | 0 | 0 |
| Stones | 3 | 3 | 3 | 3 | 3 |
| Unknown foreign sunstance | 3 | 3 | 3 | 3 | 3 |
| Total 4/ | 4 | 4 | 4 | 4 | 4 |
| Insect-damaged kernels in 100 grams | 31 | 31 | 31 | 31 | 31 |
U.S. Sample grade:
Wheat that:
(a) Does not meet the requirements for U.S. Nos. 1, 2, 3, 4, 5; or
(b) Has a musty, sour or commercially objectionable foreign odor (except smut or garlic odor); or
(c) Is heating or of distinctly low quality.
1/ Includes damaged kernels (total), foreign material, and shrunken and broken kernels.
2/ Unclassed wheat of any grade may contain not more than 10.0% of wheat of other classes.
3/ Includes contrasting classes.
4/ Includes any combination of animal filth, castor beans, crotalaria seeds, glass, stones, or unknown foreign substance. |
Conversion Factors |
Wheat Equivalents
1 bushel = 60 pounds (27.2 kg)
36.74 bushels = 1 metric ton
37.33 bushels = 1 long ton
33.33 bushels = 1 short ton
3.67 bushels = 1 quintal
tons/ha = 0.06725 bu/acre
durum kg/hl = lbs/bu x 1.292 + 0.630
other wheat kg/hl = lbs/bu x 1.292 + 1.419 | Metric Equivalents
1 pound = 0.4536 kg
1 metric ton (MT) = 2204.6 lbs
1 short ton (2000 lbs) = 0.9072 MT, or 907.2 kg
1 long ton (2240 lbs) = 1.016 MT, or 1016 kg
1 metric ton = 10 quintals
1 hectare = 2.47 acres
1 acre = 0.40 hectare
1 hundredweight = 100 pounds or 45.36 kg
1 metric ton/ha. = 14.87 bu./acre |
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