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Home >> Length Conversions

Kilometer to Millimeter Conversion

Type a value to convert from kilometer to millimeter.

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Kilometer

A kilometre is a unit of length in the metric system, equal to 1000 metres, the current SI base unit of length. It can be written as 1,000 x 1 metres.

Millimeter

A millimetre is a unit of length in the metric system, equal to 1000 of a metre, which is the current SI base unit of length. It can be written as 1 metre / 1,000.