# Convert Kilometer to Millimeter (km to mm)

In next fields, kindly type your value in the text box under title [ From: ] to convert from kilometer to millimeter (km to mm). As you type your value, the answer will be automatically calculated and displayed in the text box under title [ To: ].

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Definitions:

Kilometer (abbreviation: km): is a unit of length in the SI metric system, equal to one thousand metres (kilo- being the prefix for 1000). It is now the measurement unit used officially for expressing distances between geographical places on land in most of the world countries.

Millimeter (abbreviation: mm): is a unit of length in the SI metric system, equal to one thousandth of a metre. Therefore, there are thousand millimetres in a metre and ten millimetres in a centimetre.

## How to Convert Kilometers to Millimeters

### Example: How many millimeters are equivalent to 56.79 kilometers?

As;

1 kilometers = 1000000 millimeters

56.79 kilometers = Y millimeters

Assuming Y is the answer, and by criss-cross principle;

Y equals 56.79 times 1000000 over 1

(i.e.) Y = 56.79 * 1000000 / 1 = 56790000 millimeters

Answer is: 56790000 millimeters are equivalent to 56.79 kilometers.

### Practice Question: Convert the following units into mm:

N.B.: After working out the answer to each of the next questions, click adjacent button to see the correct answer.

( i ) 3.59 km

( ii ) 30.69 km

( iii ) 54.35 km

References
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