AutoCAD Scale Factors Charts
Here are some simple charts to help you convert drawing scale to scale factor, for working in CAD
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Architectural Scales
| Drawing Scale |
Scale Factor |
Viewport Scale |
Decimal Scale |
|---|---|---|---|
| 1/16″ = 1′-0″ | 192 | 1/192xp | .0625″ = 1′-0″ |
| 3/32″ = 1′-0″ | 128 | 1/128xp | .09375″ = 1′-0″ |
| 1/8″ = 1′-0″ | 96 | 1/96xp | .125″ = 1′-0″ |
| 3/16″ = 1′-0″ | 64 | 1/64xp | .1875″ = 1′-0″ |
| 1/4″ = 1′-0″ | 48 | 1/48xp | .25″ = 1′-0″ |
| 3/8″ = 1′-0″ | 32 | 1/32xp | .375″ = 1′-0″ |
| 1/2″ = 1′-0″ | 24 | 1/24xp | .50″ = 1′-0″ |
| 3/4″ = 1′-0″ | 16 | 1/16xp | .75″ = 1′-0″ |
| 1″ = 1′-0″ | 12 | 1/12xp | 1″ = 1′-0″ |
| 1 1/2″ = 1′-0″ | 8 | 1/8xp | 1.5″ = 1′-0″ |
| 3″ = 1′-0″ | 4 | 1/4xp | 3″ = 1′-0″ |
Engineering Scales
| DRAWING SCALE | SCALE FACTOR | VIEWPORT SCALE |
|---|---|---|
| 1″ = 10′-0″ | 120 | 1/120xp |
| 1″ = 20′-0″ | 240 | 1/240xp |
| 1″ = 30′-0″ | 360 | 1/360xp |
| 1″ = 40′-0″ | 480 | 1/480xp |
| 1″ = 50′-0″ | 600 | 1/600xp |
| 1″= 60′-0″ | 720 | 1/720xp |
| 1″ = 70′-0″ | 840 | 1/840xp |
| 1″ = 80′-0″ | 960 | 1/960xp |
| 1″ = 90′-0″ | 1080 | 1/1080xp |
| 1″ = 100′-0″ | 1200 | 1/1200xp |
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