Architectural
| Drawing Scale | Scale Factor | Viewport Scale | Decimal Scale |
|---|---|---|---|
| 1/16" = 1'-0" | 192 | 1/192 xp | 0.0625" = 1'-0" |
| 3/32" = 1'-0" | 128 | 1/128 xp | 0.09375" = 1'-0" |
| 1/8" = 1'-0" | 96 | 1/96 xp | 0.125" = 1'-0" |
| 3/16" = 1'-0" | 64 | 1/64 xp | 0.1875" = 1'-0" |
| 1/4" = 1'-0" | 48 | 1/48 xp | 0.25" = 1'-0" |
| 3/8" = 1'-0" | 32 | 1/32 xp | 0.375" = 1'-0" |
| 1/2" = 1'-0" | 24 | 1/24 xp | 0.5" = 1'-0" |
| 3/4" = 1'-0" | 16 | 1/16 xp | 0.75" = 1'-0" |
| 1" = 1'-0" | 12 | 1/12 xp | 1" = 1'-0" |
| 1 1/2" = 1'-0" | 8 | 1/8 xp | 1.5" = 1'-0" |
| 3" = 1'-0" | 4 | 1/4 xp | 3" = 1'-0" |
To convert an architectural drawing scale to a scale factor:
Select the desired scale, then invert the fraction and multiply by 12.
For example, if you choose 1/8" = 1'-0"
• Invert the 1/8 to get 8/1
• Multiply 8/1 by 12
• 8/1 x 12 = 96
• Scale Factor = 96
Engineering
| Drawing Scale | Scale Factor | Viewport Scale |
|---|---|---|
| 1" = 10'-0" | 120 | 1/120 xp |
| 1" = 20'-0" | 240 | 1/240 xp |
| 1" = 30'-0" | 360 | 1/360 xp |
| 1" = 40'-0" | 480 | 1/480 xp |
| 1" = 50'-0" | 600 | 1/600 xp |
| 1" = 60'-0" | 720 | 1/720 xp |
| 1" = 70'-0" | 840 | 1/840 xp |
| 1" = 80'-0" | 960 | 1/960 xp |
| 1" = 90'-0" | 1080 | 1/1080 xp |
| 1" = 100'-0" | 1200 | 1/1200 xp |
To convert an engineering drawing scale to a scale factor:
Select the desired scale, then multiply the feet by 12.
For example, if you choose 1" = 20'
• Multiply 20 by 12
• 20 x 12 = 240
• Scale Factor = 240
