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Table of Contents:    

3.3 Units and Conversion Guide


Comparison of Drawing Scales

Inch-foot scales

Inch-foot ratio

Metric scale

Full Size

1:1

1:1

Half Size

1:2

1:2

4” = 1’-0”

1:3

3” = 1’-0”

1:4

1:5

2” = 1’-0”

1:6

1-1/2” = 1’-0”

1:8

1:10

1” = 1’-0”

1:12

¾” = 1’-0”

1:16

1:20

½” = 1’-0”

1:24

1:25

¼” = 1’-0”

1:48

1:50

1” = 5’-0”

1:60

1/8” = 1’-0”

1:96

1:100

1” = 10’-0”

1:120

1/16” = 1’-0”

1:192

1:200

1” = 20’-0”

1:240

1:250

1” = 30’-0”

1:360

1/32” = 1’-0”

1:384

1” = 40’-0”

1:480

1:500

1” = 50’-0”

1:600

1” = 60’-0”

1:720

1” = 80’-0”

1:960

1:1000

Conversion Factors

Quantity

From inch-pound units

To metric units

Multiply by

Length

mile

km

1.609344

*

yard

m

0.9144

*

foot

m

0.3048

*

mm

304.8

*

inch

mm

25.4

*

Area

square mile

km 2

2.59

acre

m 2

4046.87

ha (10000m 2 )

0.404687

square yard

m 2

0.83612736

*

square foot

m 2

0.09290304

*

square inch

mm 2

645.16

*

* Denotes the exact conversion.




This page last updated on Jan 26, 2006