Imperial Drawing Scales - Échelles Impériales
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 |
0.041667 |
| 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 |
0.000417 |
| 1"=300' |
1:3600 |
0.000277 |
| 1"=400' |
1:4800 |
0.000208 |
| 1"=500' |
1:6000 |
0.000166 |
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