18mm is 1.8cm
18mm = 0.018m
7cm is much more than 18mm. Through conversions, 7cm is the same as 70mm, and 18mm is 1.8cm.
If the radius of a circle is 18mm, its diameter is: 36mm
That's in the right order.
25 mm * 18mm = 0.98 inches * 0.71 inches.
9mm
18mm. Just had to replace the 02 sensors on mine. Had to buy a box of 12 nuts! And a 18mm bolt to plug the old location.
The volume of a cube whose side measures 18mm is: 5,832 mm3
324mm
A dime is 17.91mm.
According to ISO For Stainless steel round bar, 10 to 18mm, it will be + 0, - 0,043mm (18,00 to 18,043)