We have a handy PDF file showing engineering and map scales, and their decimal and fractional equivalents. This is an easy to use chart so you can convert to different scales. We have found this useful for converting fractional scale to feet per inch, inches per 1000 feet, inches per mile, meters per inch, acres per square inch, square inches per acre, and square mile per square inch.
Download a printable PDF version of this chart at the link below.
| 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″ |
| 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 |
We can convert your PDF files to fully layered AutoCAD DWG files.