Shortcut Conversions

Inches to Millimeters
Inches
Decimal
Millimeters
1/16″
.0625
1.59 mm
1/8″
.1250
3.18 mm
3/16″
.1875
4.76 mm
1/4″
.2500
6.35 mm
5/16″
.3125
7.94 mm
3/8″
.3750
9.53 mm
7/16″
.4375
11.11 mm
 1/2″
.5000
12.70 mm
 9/16″
.5625
14.29 mm
5/8″
.6250
15.88 mm
 11/16″
.6875
17.46 mm
 3/4″
.7500
19.05 mm
13/16″
.8125
20.64 mm
7/8″
.8750
22.23 mm
15/16″
.9375
23.81 mm
1″
1.00
25.40 mm

 

Imperial and Metric Sizes
If you know…
And want to find…
Multiply by:
Inches
Millimetres
25.4
Inches
Centimetres
2.54
Millimetres
Inches
.03937
Centimetres
Inches
.3937
Feet
Metres
.3048
Metres
Feet
3.28
MBF, full sawn*
Cubic Metres
2.36
 Cubic Metres
MBF, full sawn*
.424
MSF, 3/8″ basis
Cubic Metres
.885
Cubic Metres
MSF, 3/8″ basis
1.13

* Nominal sawn timber is usually converted to cubbic measure by the same factors. However, there are approximately 638 board feet of nominal sized timber in a cubic metre, making the mathematically correct conversion factors 1.57 and 0.638.