Metric and Imperial Scale Factors

Standard Imperial Engineering Scale

1"=10'

1"=20'

1"=30'

1"=40'

1"=50'

1"=60'

1"=70'

1"=80'

1"=90'

1"=100'

1"=150'

1"=200'

1"=300'

1"=400'

1"=500'

Scale Factor (Architectural Inches)

120

240

360

480

600

720

840

960

1080

1200

1800

2400

3600

4800

6000

Scale Factor (Decimal Feet)

10

20

30

40

50

60

70

80

90

100

150

200

300

400

500

Standard Imperial Architectural Scale

1' = 1'-0"

6" = 1'-0"

3" = 1'-0"

1 1/2" = 1'-0"

1" = 1'-0"

3/4" = 1'-0"

1/2" = 1'-0"

3/8" = 1'-0"

1/4" = 1'-0"

3/16" = 1'-0"

1/8" = 1'-0"

3/32" = 1'-0"

1/16" = 1'-0"

1/32" = 1'-0"

1/64" = 1'-0"

1/128" = 1'-0"

Scale Factor (Architectural Inches)

1

2

4

8

12

16

24

32

48

64

96

128

192

384

768

1536

Scale Factor (Decimal Feet)

1

.1667

.3333

.6667

1

1.3333

2

2.6667

4

5.3333

8

10.667

16

32

64

128

Standard Metric Scale

1:1

1:2

1:5

1:7.5

1:10

1:12.5

1:15

1:20

1:25

1:30

1:40

1:50

1:75

1:100

1:125

1:150

1:200

1:250

1:300

1:400

1:500

1:600

1:750

1:1000

1:1250

1:1500

1:2000

1:2500

1:3000

1:4000

1:5000

1:10000

Scale Factor (Millimeters)

1

2

5

6

10

12.5

15

20

25

30

40

50

75

100

125

150

200

250

300

400

500

600

750

1000

1250

1500

2000

2500

3000

4000

5000

10000

Scale Factor (Centimeters)

.1

.2

.5

.6

1

1.25

1.5

2

2.5

3

4

5

7.5

10

12.5

15

20

25

30

40

50

60

75

100

125

150

200

250

300

400

500

1000

Scale Factor (Meters)

.001

.002

.005

.006

.01

.0125

.015

.02

.025

.03

.04

.05

.075

.1

.125

.15

.2

.25

.3

.4

.5

.6

.75

1

1.25

1.5

2.0

2.5

3

4

5

10