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 28.16 inches?
As;
1 inches = 25.4 millimeters
28.16 inches = Y millimeters
Assuming Y is the answer, and by criss-cross principle;
Y equals 28.16 times 25.4 over 1
(i.e.) Y = 28.16 * 25.4 / 1 = 715.264 millimeters
Answer is: 715.264 millimeters are equivalent to 28.16 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 ) 66.92 in
( ii ) 81.48 in
( iii ) 85.86 in
