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This measurement is already present in the question in kilograms and grams. There are 1000 grams in one kilogram, therefore 421 / 1000 = 0.421 kilograms. Add 9 to this, and you get 9.421 kilograms.

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Wiki User

15y ago
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6mo ago

9.421 kg

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Q: 9 kg 421 g to kilograms?
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