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# Convert Inch to Millimeter (in to mm)

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

From:
To:
Definitions:

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.

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 Inches to Millimeters

### Example: How many millimeters are equivalent to 24.57 inches?

As;

1 inches = 25.4 millimeters

24.57 inches = Y millimeters

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

Y equals 24.57 times 25.4 over 1

(i.e.) Y = 24.57 * 25.4 / 1 = 624.078 millimeters

Answer is: 624.078 millimeters are equivalent to 24.57 inches.

### 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 ) 11.88 in

( ii ) 30.69 in

( iii ) 83.97 in

References
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