Drill sizes are for 75% depth of thread. Metric tap and drill bit size table. Tap sizes are shown as hole size â threads per mm (millimeter). Example 6mm-1.0 = 6mm hole, 1 threads per mm.
How to find the area of a square: The area of a square can be found by multiplying the base times itself. This is similar to the area of a rectangle but the base is the same length as the height. If a square has a base of length 6 inches its area is 6*6=36 square inches.
Write these measurements down. Find the area of the entire carpet roll and the area of the hole in the center. For example, if the carpet roll is 22 inches, the radius will be 11 inches. Find the area by multiplying 3.14 11 ^2 = 379 .94. If the center hole diameter is 6 inches, the radius will be 3 inches. Find the area by multiplying 3.14 3 ^2 = 28.26. Subtract the area of the center hole from the area of the entire roll to find the adjusted area of the carpet. Using the same example, 379.94 - 28.26 = 351.68. Divide the adjusted area by the thickness of the carpet to find the linear length.