Conversion Tables

Metric Conversions

Lenght Area
When you know Multiply by To find When you know Multiply by To find
Inches 25.40 Millimeters Square inches 645.2 Square millimeters
Inches 2.540 Centimeters Square inches 6.45 Square centimeters
Feet 304.80 Millimeters Square feet 929.0 Square centimeters
Feet 30.48 Centimeters Square feet 0.09 Square meters
Feet 0.30 Meters Square yards 0.84 Square meters
When you know Divide by To find When you know Divide by To find
Millimeters 25.40 Inches Square millimeters 645.2 Square inches
Centimeters 2.54 Inches Square centimeters 6.45 Square inches
Millimeters 304.48 Feet Square centimeters 929.0 Square feet
Centimeters 30.48 Feet Square meters 0.09 Square feet
Meters 0.30 Feet Square meters 0.84 Square yards
Weight
When you know Multiply by To find When you know Divide by To find
3 3.25 2.5 10-24 13/64 #25
4 4.25 3.25 10-32 13/64 #21
Liquid
When you know Multiply by To find When you know Multiply by To find
Liters 0.26 Gallons Gallons 3.78 Liters
Liters 2.11 Pints Pints 0.47 Liters

Drilling Guide

 

Fastener (mm) Drill for clearance hole (mm) Drill for tapping (mm) Fastener Drill for clearance hole (in) Drill for tapping
2 2.25 1.6 6-32 9/64 #36
2.5 2.75 2.05 8-32 11/64 #29
3 3.25 2.5 10-24 13/64 #25
4 4.25 3.25 10-32 13/64 #21
5 5.25 4.25 1/4-20 17/64 #7
6 6.25 5 5/16-18 21/64 #F
8 8.25 6.75 3/8-16 25/64 5/18*
10 10.25 8.5 7/16-14 29/64 #T
12 12.25 10.25 1/2-13 33/64 27/64″
16 16.26 14 5/8-11 41/64 1 7/32″

Equivalency Table

Fraction Decimal mm
1/32 0.03 0.79
1/16 0.06 1.59
3/32 0.09 2.38
1/8 0.13 3.18
5/32 0.16 3.97
3/16 0.19 4.76
7/32 0.22 5.56
1/4 0.25 6.35
9/32 0.28 7.14
5/16 0.31 7.94
11/32 0.34 8.73
3/8 0.38 9.53
13/32 0.41 10.32
7/16 0.44 11.11
15/32 0.47 11.91
1/2 0.50 12.70
17/32 0.53 13.49
9/16 0.56 14.29
19/32 0.59 15.08
5/8 0.63 15.88
21/32 0.66 16.67
11/16 0.69 17.46
23/32 0.72 18.26
3/4 0.75 19.05
25/32 0.78 19.84
13/18 0.81 20.64
27/32 0.84 21.43
7/8 0.88 22.23
29/32 0.91 23.02
15/16 0.94 23.81
31/32 0.97 24.61