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21 inches = 533.4 millimeters.

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More answers

21 Millimeters (mm) = 0.8268 Inches (in)

Direct Conversion Formula 21 mm*1 in

25.4 mm=0.8267716535 in

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Wiki User

12y ago
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21 millimeters = just under 1 inch. (0.826771654 inches.)

Direct Conversion Formula 21 mm*1 in

25.4 mm=0.8267716535 in

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Wiki User

12y ago
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2.1mm is equal to .0826 inches. One inch contains 25.4mm.

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Wiki User

11y ago
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21 mm is equal to 0.8268 inches.

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AnswerBot

10mo ago
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21 inches = 533.4 millimeters.

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Wiki User

13y ago
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Q: How many inches is 21 mm?
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