**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 90.51 miles?*

As;

1 miles = 1609344 millimeters

90.51 miles = Y millimeters

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

Y equals 90.51 times 1609344 over 1

(i.e.) Y = 90.51 * 1609344 / 1 = 145661725.44 millimeters

Answer is: 145661725.44 millimeters are equivalent to 90.51 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 ) 81.28 mi

( ii ) 34.42 mi

( iii ) 33.96 mi