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A scale with a gm mode is probably referring to "grains."

In metric, grain (gn) is equal to 50 MICROgrams (mg).

In Imperial/British/Standard: The term dates back to the early British (aka Imperial) system of weights and measures where grain was used as the basis of all weights and was, therefore, the smallest of all weights in this system.

1 grain = 1/7,000 of a pound (lb), or about 0.0646 grams

In mass, gm is sometimes used to indicate grams, though g is more common (and correct). Weight is not a measure of mass but a measure of the effect of gravity on a mass, so in this case, it would not actually be a measurement of weight.

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10y ago

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