**Definitions:**

**Mile** (abbreviation: **mi**): is an English unit of length of distance equal to 5,280 feet, or 1,760 yards, and standardised as exactly 1,609.344 metres by international agreement in 1959.

**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 Miles to Millimeters

*Example: How many millimeters are equivalent to 17.88 miles?*

As;

1 miles = 1609344 millimeters

17.88 miles = Y millimeters

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

Y equals 17.88 times 1609344 over 1

(i.e.) Y = 17.88 * 1609344 / 1 = 28775070.72 millimeters

Answer is: 28775070.72 millimeters are equivalent to 17.88 miles.

*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 ) 44.13 mi

( ii ) 16.4 mi

( iii ) 39.6 mi