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Canada now usually employs the metric cup of 250 mL but its conventional cup was somewhat smaller than both American and imperial units.
1 Canadian cup = 8 imperial fluid ounce = 1/20 imperial gallon = 227.3045 millilitres
1 tablespoon = 1/2 imperial fluid ounce
1 teaspoon = 1/6 imperial fluid ounce
The cubic yoctometre or cubic yoctometer is the unit of volume. Its symbol is ym3. It is the volume of a cube with edges one yoctometre in length.