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Imperial Cad Scales

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Imperial Cad Scales

This is for my own use as much as anything. But figured I would share them for all to reference. When I’m doing architectural designs I have to refer to these often. Maybe they will help you as well.

Architectural

Scale

Factor

Decimal

1’=1′-0″

1:1

1.0

6″=1′-0″

1:6

0.5

1-1/2″=1′-0″

1:8

0.125

1″=1′-0″

1:12

0.08333

3/4″=1′-0″

1:16

0.06250

1/2″=1′-0″

1:24

0.41667

3/8″=1′-0″

1:32

0.031250

1/4″=1′-0″

1:48

0.020833

3/16″=1′-0″

1:64

0.015625

1/8″=1′-0″

1:96

0.010417

3/32″=1′-0″

1:128

0.007813

1/16″=1′-0″

1:192

0.005208

1/32″=1′-0″

1:384

0.002604

1/64″=1′-0″

1:768

0.001302

1/128″=1′-0″

1:1536

0.000651

 

 

Engineering

Scale

Factor

Decimal

1″=10′

1:120

0.008333

1″=20′

1:240

0.004167

1″=30′

1:360

0.002778

1″=40′

1:480

0.002083

1″=50′

1:600

0.001667

1″=60′

1:720

0.001389

1″=70′

1:840

0.001190

1″=80′

1:960

0.001042

1″=90′

1:1080

0.000926

1″=100′

1:1200

0.000833

1″=150′

1:1800

0.000555

1″=200′

1:2400

0.000416

1″=300′

1:3600

0.000277

1″=400′

1:4800

0.000208

1″=500′

1:6000

0.000166

 

 

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