Metric Conversion Chart

CONVERTING MEASUREMENTS

TO CONVERT:	TO:	MULTIPLY BY:
Inches	Millimeters	25.4
Inches	Centimeters	2.54
Feet	Meters	0.305
Yards	Meters	0.914
Square inches	Square centimeters	6.45
Square feet	Square meters	0.093
Square yards	Square meters	0.836
Cubic inches	Cubic centimeters	16.4
Cubic feet	Cubic meters	0.0283
Cubic yards	Cubic meters	0.765
Pounds	Kilograms	0.454

TO CONVERT:	TO:	MULTIPLY BY:
Millimeters	Inches	0.039
Centimeters	Inches	0.394
Meters	Feet	3.28
Meters	Yards	1.09
Square centimeters	Square inches	0.155
Square meters	Square feet	10.8
Square meters	Square yards	1.2
Cubic centimeters	Cubic inches	0.061
Cubic meters	Cubic feet	35.3
Cubic meters	Cubic yards	1.31
Kilograms	Pounds	2.2

LUMBER DIMENSIONS

NOMINAL–US	ACTUAL–US (IN INCHES)	METRIC
1 × 2	3/4 × 11/2	19 × 38 mm
1 × 3	3/4 × 21/2	19 × 64 mm
1 × 4	3/4 × 31/2	19 × 89 mm
1 × 6	3/4 × 51/2	19 × 140 mm
1 × 8	3/4 × 71/4	19 × 184 mm
1 × 10	3/4 × 91/4	19 × 235 mm
1 × 12	3/4 × 111/4	19 × 286 mm
2 × 2	11/2 × 11/2	38 × 38 mm
2 × 3	11/2 × 21/2	38 × 64 mm
2 × 4	11/2 × 31/2	38 × 89 mm
2 × 6	11/2 × 51/2	38 × 140 mm
2 × 8	11/2 × 71/4	38 × 184 mm
2 × 10	11/2 × 91/4	38 × 235 mm
2 × 12	11/2 × 111/4	38 × 286 mm
4 × 4	31/2 × 31/2	89 × 89 mm
4 × 6	31/2 × 51/2	89 × 140 mm
6 × 6	51/2 × 51/2	140 × 140 mm
8 × 8	71/4 × 71/4	184 × 184 mm

METRIC PLYWOOD

STANDARD SHEATHING GRADE	SANDED GRADE
7.5 mm (5/16")	6 mm (4/17")
9.5 mm (3/8")	8 mm (5/16")
12.5 mm (1/2")	11 mm (7/16")
15.5 mm (5/8")	14 mm (9/16")
18.5 mm (3/4")	17 mm (2/3")
20.5 mm (13/16")	19 mm (3/4")
22.5 mm (7/8")	21 mm (13/16")
25.5 mm (1")	24 mm (15/16")

COUNTERBORE, SHANK, & PILOT HOLE DIAMETERS (INCHES)

SCREW SIZE	COUNTERBORE DIAMETER FOR SCREW HEAD	CLEARANCE HOLE FOR SCREW SHANK	PILOT HOLE DIAMETER
			HARD WOOD	SOFT WOOD
#1	(9/64)	5/64	3/64	1/32
#2	1/4	3/32	3/64	1/32
#3	1/4	7/64	1/16	3/64
#4	1/4	1/8	1/16	3/64
#5	1/4	1/8	5/64	1/16
#6	5/16	9/64	3/32	5/64
#7	5/16	5/32	3/32	5/64
#8	3/8	11/64	1/8	3/32
#9	3/8	11/64	1/8	3/32
#10	3/8	3/16	1/8	7/64
#11	1/2	3/16	5/32	9/64
#12	1/2	7/32	9/64	1/8