Conversion Tables
Useful Metric and Imperial Conversions
Conversion Table
ConversionMethod
Inches to CentimetresMultiply
by 2.54
Centimetres to InchesMultiply
by 0.3937
Feet to MetresMultiply
by 0.3048
Metres to FeetMultiply
by 3.2810
Yards to MetresMultiply
by 0.9144
Metres to YardsMultiply
by 1.0940
Media Weight and Thickness
25 microns = 1 thou, i.e. 125 microns = 5 thou
Cut-sheet media (paper) sizes
The CAD industry has American and International standards for media sizes (paper and mylar are common media types). This problem summary will list the 3 most popular standards and show the media sizes for each in inches and in millimeters. The three most popular standards are:
- ANSI American National Standards Institute for Engineering Drawing
- ARCH Architectural Standard
- ISO International Standards Organization for Engineering Drawings
NSI Media Sizes, as established by the ANSI Standards
Media SizeInchesMillimeters
A8.5
x 11216 x 279
B11
x 17279 x 432
C17
x 22432 x 559
D22
x 34559 x 864
E34
x 44864 x 1118
ARCH Media Sizes, as established by the Architectural Standards
Media SizeInchesMillimeters
ARCH 19
x 12229 x 305
ARCH 212
x 18305 x 457
ARCH 318
x 24457 x 610
ARCH 424
x 36510 x 914
ARCH 530
x 42762 x 1067
ARCH 6
34 x 44914 x 1219
ISO Media Sizes, as established by the International National Institute for Engineering Standards
The A series is primarily used for general printed matter, e.g. stationary and publications.
Media SizeMillimetersApprox
Inches
A0841
x 118933 1/8 x 46 3/4
A1594
x 84123 3/8 x 33 1/8
A2420
x 59416 1/2 x 23 3/8
A3+330
x 480.313 x 19
A3297
x 42011 3/4 x 16 1/2
A4210
x 2978 1/4 x 11 3/4
A5148
x 2105 7/8 x 8 1/4
A6105
x 1484 1/8 x 5 7/8
A774
x 1052 7/8 x 4 1/8
A852
x 74914 x 1219
A937
x 521 1/2 x 2
A1026
x 371 x 1 1/2
Diagram demonstrating the A series size guide