1 inch (English unit) equals about 2.54 centimeters (metric unit).
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1 cm = 0.3937 in.
0.3937 inches. Try 2.54 centimeters per inch.
1 inch = 2.54 cm4.2 cm = 4.2/2.54 inch = 1.6535 inch
There are 25.4 thousandths of an inch in 1 cm.
2.54... that is there are 25.4 mm to 1 inch. 2.54 cm = 25.4 mm