2100 g = 2.1 kg
To convert from g to kg, divide by 1000.
There are 1000 grams in one kilogram. Therefore, 2100 grams is equal to 2100/1000 = 2.1 kilograms.
It is equal to 4.63 pounds approximately. Kilogram is the metric unit and pound is the imperial unit for mass. 1 Kilogram is 2.204 pounds. So we multiply kg by 2.204 to get the equivalent pounds.
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1000 grams is a kilogram.
1 kilogram = 1000 grams 1 gram = 0.001 kilogram
It is 2,100
If it is "correct to 1/10th of a kilogram", that means that the meximum error is 1/2 that amount, in other words, 1/20th of a kilogram. I suggest you convert everything to grams first - 1 kilogram = 1000 grams.
2100g is 2.1kg