Test weight calculators for Canadian grains

JavaScript must be enabled to use the calculators. If you are unable to use JavaScript, you can calculate test weight by using our test weight conversion charts.

Use these calculators to convert units of measurement or to determine the weight and volume of grain.

  1. Select the calculator you wish to use
  2. Enter the required value(s) in the input field(s)
  3. Click the “Convert” button to get results
  4. When finished, click the “Reset” button to clear the values

Test weight conversions from half-litre sample weights

  • Wheat

    Test weight calculator for wheat

    Test weight is a grade-determining factor for wheat.

     g/0.5 L
    =  kg/hL
    =  lb/bu‐A
    =  lb/bu‐W

    Equations used:

    kg/hL = 1.4767 + (0.2012 x g/0.5L)
    lb/bu‐A = (kg/hL) / 1.247
    lb/bu‐W = g/0.5 L x 0.1552

  • Amber durum

    Test weight calculator for amber durum

    Test weight is a grade-determining factor for amber durum.

     g/0.5 L
    =  kg/hL
    =  lb/bu‐A
    =  lb/bu‐W

    Equations used:

    kg/hL = 0.7572 + (0.202 x g/0.5 L)
    lb/bu‐A = (kg/hL) / 1.247
    lb/bu‐W = g/0.5 L x 0.1552

  • Oats

    Test weight calculator for oats

    Test weight is a grade-determining factor for oats.

     g/0.5 L
    =  kg/hL
    =  lb/bu‐A
    =  lb/bu‐W

    Equations used:

    kg/hL = 4.3122 + (0.1986 x g/0.5 L)
    lb/bu‐A = (kg/hL) / 1.247
    lb/bu‐W = g/0.5 L x 0.1552

  • Barley

    Test weight calculator for barley

    Test weight is a grade-determining factor for barley.

     g/0.5 L
    =  kg/hL
    =  lb/bu‐A
    =  lb/bu‐W

    Equations used:

    kg/hL = −0.3063 + (0.2089 x g/0.5 L)
    lb/bu‐A = (kg/hL) / 1.247
    lb/bu‐W = g/0.5 L x 0.1552

  • Hulless barley

    Test weight calculator for hulless barley

    Test weight is a grade-determining factor for hulless barley.

     g/0.5 L
    =  kg/hL
    =  lb/bu‐A
    =  lb/bu‐W

    Equations used:

    kg/hL = 5.7215 + (0.1884 x g/0.5 L)
    lb/bu‐A = (kg/hL) / 1.247
    lb/bu‐W = g/0.5 L x 0.1552

  • Rye

    Test weight calculator for rye

    Test weight is a grade-determining factor for rye.

     g/0.5 L
    =  kg/hL
    =  lb/bu‐A
    =  lb/bu‐W

    Equations used:

    kg/hL = 2.2266 + (0.1995 x g/0.5 L)
    lb/bu‐A = (kg/hL) / 1.247
    lb/bu‐W = g/0.5 L x 0.1552

  • Flaxseed

    Test weight calculator for flaxseed

    Test weight is a grade-determining factor for flaxseed.

     g/0.5 L
    =  kg/hL
    =  lb/bu‐A
    =  lb/bu‐W

    Equations used:

    kg/hL = 6.3164 + (0.192 x g/0.5 L)
    lb/bu‐A = (kg/hL) / 1.247
    lb/bu‐W = g/0.5 L x 0.1552

  • Buckwheat

    Test weight calculator for buckwheat

    Test weight is a grade-determining factor for buckwheat.

     g/0.5 L
    =  kg/hL
    =  lb/bu‐A
    =  lb/bu‐W

    Equations used:

    kg/hL = 0.064 + (0.2032 x g/0.5 L)
    lb/bu‐A = (kg/hL) / 1.247
    lb/bu‐W = g/0.5 L x 0.1552

  • Corn

    Test weight calculator for corn

    Test weight is a grade-determining factor for corn.

     g/0.5 L
    =  kg/hL
    =  lb/bu‐A
    =  lb/bu‐W

    Equations used:

    kg/hL = 2.1025 + (0.192 x g/0.5 L)
    lb/bu‐A = (kg/hL) / 1.247
    lb/bu‐W = g/0.5 L x 0.1552

  • Soybeans

    Test weight calculator for soybeans

    Test weight is a grade-determining factor for soybeans.

     g/0.5 L
    =  kg/hL
    =  lb/bu‐A
    =  lb/bu‐W

    Equations used:

    kg/hL = 2.3696 + (0.1896 x g/0.5 L)
    lb/bu‐A = (kg/hL) / 1.247
    lb/bu‐W = g/0.5 L x 0.1552

  • Sunflower seed, confectionery

    Test weight calculator for sunflower seed, confectionery

    Test weight is a grade-determining factor for sunflower seed, confectionery.

     g/0.5 L
    =  kg/hL
    =  lb/bu‐A
    =  lb/bu‐W

    Equations used:

    kg/hL = 1.2128 + (0.1925 x g/0.5 L)
    lb/bu‐A = (kg/hL) / 1.247
    lb/bu‐W = g/0.5 L x 0.1552

  • Sunflower seed, oil

    Test weight calculator for sunflower seed, oil

    Test weight is a grade-determining factor for sunflower seed, oil.

     g/0.5 L
    =  kg/hL
    =  lb/bu‐A
    =  lb/bu‐W

    Equations used:

    kg/hL = 2.2156 + (0.194 x g/0.5 L)
    lb/bu‐A = (kg/hL) / 1.247
    lb/bu‐W = g/0.5 L x 0.1552

  • Canola

    Test weight calculator for canola

    Test weight is not a grade-determining factor for canola.

     g/0.5 L
    =  kg/hL
    =  lb/bu‐A
    =  lb/bu‐W

    Equations used:

    kg/hL = 1.9922 + (0.1957 x g/0.5-L)
    lb/bu‐A = (kg/hL) / 1.247
    lb/bu‐W = g/0.5 L x 0.1552

  • Other grains

    Test weight calculator for other grains

    Use this calculator to determine the bushel weight of other grains for which test weight is not a grading factor, such as peas and lentils. These conversions from gram per half-litre to bushel weights do not account for grain compaction and are not based on the results of actual sample collection.

     g/0.5 L

    Calculated uncompacted bushel weights

    =  lb/bu‐A
    =  lb/bu‐W

    Equations used:

    lb/bu‐A = (g/0.5 L) x 2 / (453.6 g/lb) x 36.369 L/bu-A
    lb/bu‐W = (g/0.5 L) x 2 / (453.6 g/lb) x 35.239 L/bu-W

Determining grain weights and volumes

Bushels in a metric tonne
Enter grain bushel weight in pounds per bushel (lb/bu)  


=  number of bushels in 1 metric tonne

Equation used:

bushels = (1000 kg/t ) / (lb/bu x 0.4536 kg/lb)

Tonnes from bushels
Enter grain bushel weight in pounds per bushel (lb/bu)  


Enter number of bushels  


=  metric tonnes

Equation used:

Metric tonnes = (lb/bu) x (bu) x 0.4536 (kg/lb) x 0.001 t/kg

Volume of grain in a cylindrical bin

If the cylindrical bin is full, then the grain volume will be the measurements of the bin height and diameter. However, if the bin is partly full, then the height measurement will be the level of the grain.

Enter bin height (in metres)  


Enter bin diameter (in metres)  


bin volume =  litres
=  Avery (Imperial) bushels
=  Winchester (U.S.) bushels


Note: These calculations provide only approximations of volume and depend on the accuracy of measurements and conformance to the shape shown.

Equations used:

litres = 3.1415 x [diameter (m) x 0.5]2 x height (m) x 1000 L/m3
Avery (Imperial) bushels = litres / (36.369 L/bu-A)
Winchester (U.S.) bushels = litres / (35.239 L/bu-W)

cylinder formula image
Volume of grain in a conical pile

This estimation of grain volume requires that the pile of grain be approximately cone-shaped. Typically, grain in a pile will have a short, wide cone shape.

Enter grain pile height at the centre (in metres)  


Enter grain pile base diameter (in metres)  


volume of a conical pile =  litres
=  Avery (Imperial) bushels
=  Winchester (U.S.) bushels


Note: These calculations provide only approximations of volume and depend on the accuracy of measurements and conformance to the shape shown.

Equations used:

litres = 3.1415 x [diameter (m) x 0.5]2 x 1/3 height (m) x 1000 L/m3
Avery (Imperial) bushels = litres / (36.369 L/bu-A)
Winchester (U.S.) bushels = litres / (35.239 L/bu-W)

pile formula image
Volume of grain in a box

This applies to grain stored in a cubic shape, such as shipping containers, square totes or other box-shaped confinements.

Enter box height (in metres)  


Enter box length (in metres)  


Enter box depth (in metres)  


box volume =  litres
=  Avery (Imperial) bushels
=  Winchester (U.S.) bushels


Note: These calculations provide only approximations of volume and depend on the accuracy of measurements and conformance to the shape shown.

Equations used:

box volume (litres) = height (m) x length (m) x depth (m) x 1000 L/m3
Avery (Imperial) bushels = litres / (36.369 L/bu-A)
Winchester (U.S.) bushels = litres / (35.239 L/bu-W)

box formula image
Weight of a specified volume of grain

Avery (Imperial) bushel weight


Enter volume of grain in litres  


Enter grain bushel weight in lb/bu‐A  


=  kilograms in the specified volume


Winchester (U.S.) bushel weight


Enter volume of grain in litres  


Enter grain bushel weight in lb/bu‐W  


=  kilograms in the specified volume

Equations used:

(lb/bu‐A x 0.4536 kg/lb) / 36.4 L/bu x (litres)
(lb/bu‐W x 0.4536 kg/lb) / 35.2 L/bu x (litres)

Volume of a specified weight of grain  

New addition

Enter weight of grain in kilograms  


Enter grain test weight in kg/hL  


=  liters of that mass of grain
=  Imperial bushels


Equations used:

liters = mass (kg) / TWT (kg/hL)
Imperial bushels = liters / 36.4 L/bu

Converting units of volume
Enter volume of grain in litres  


=  Avery (Imperial) bushels

=  Winchester (U.S.) bushels

=  cubic feet

Equations used:

Avery (Imperial) bushels = litres / 36.369 L/bu-A
Winchester (U.S.) bushels = litres / 35.239 L/bu-W
cubic feet = litres x 0.0353 L/ft3

Converting units of weight
Enter weight in pounds  


=  kilograms


Enter weight in kilograms  


=  pounds

Equations used:

kilograms = lbs x 0.4536 kg/lb
pounds = kg / 0.4536 kg/lb


Unit equivalents for volumes and weights

1 Avery (Imperial) bushel = 36.37 litres = 1.28 cubic feet
1 Winchester (U.S.) bushel = 35.24 litres = 1.24 cubic feet
1 pound = 453.6 grams = 0.4536 kilograms
1 cubic metre = 1000 litres

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