# Convert Millimeter to Inch (mm to in)

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

**Definitions:**

**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.

**Inch** (abbreviation: **in**): is a unit of length in the (British) imperial and United States customary systems of measurement now formally equal to 1/36 yard but usually taken as 1/12 of a foot.

## How to Convert Millimeters to Inches

*Example: How many inches are equivalent to 31.41 millimeters?*

As;

1 millimeters = 0.03937 inches

31.41 millimeters = Y inches

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

Y equals 31.41 times 0.03937 over 1

(i.e.) Y = 31.41 * 0.03937 / 1 = 1.2366117 inches

Answer is: 1.2366117 inches are equivalent to 31.41 millimeters.

*Practice Question: Convert the following units into in:*

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

( i ) 39.78 mm

( ii ) 98.01 mm

( iii ) 65.92 mm