XinY Units - Convert weight units from Grains to Tonnes
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Grains
A grain is an obsolescent unit of measurement of mass, equal to exactly 64.798 91 milligrams
Tonnes
The tonne is a metric unit of mass equal to 1,000 kilograms. It is also referred to as a metric ton to distinguish it from the non-metric unit. It is equivalent to approximately 2,204.6 pounds.