APPENDIX C

UNITS OF MEASURE AND CONVERSION FACTORS

This appendix provides conversion tables for units of measure and conversion factors that are used in military operations.

12 inches

36 inches

3 feet

1,760 yards

2,026.8 yards

5,280 feet

6,080.4 feet

63,360 inches

72,963 inches

=

=

=

=

=

=

=

=

=

1 foot

1 yard

1 yard

1 mile statute

1 mile nautical

1 mile statute

1 mile nautical

1 mile statute

1 mile nautical

Table C-1. English system of linear measure.

1 millimeter

10 millimeters

10 centimeters

10 decimeters

10 meters

10 decameters

10 hectometers

10 kilometers

=

=

=

=

=

=

=

=

centimeter

centimeter

decimeter

meter

decameter

hectometer

kilometer

1.0 myriameter

=

=

=

=

=

=

=

=

0.0393 inches

0.3937 inches

3.937 inches

39.37 inches

32.81 feet

328.1 feet

0.62 mile

6.21 miles

Table C-2. Metric system of linear measure.

1 mil

1 grad

1 degree

=

=

=

1/6400 circle

1/400 circle

1/360 circle

=

=

=

0.05625°

16.0 mils

about 17.8 mils

=

=

=

0.0625 grad

0°54’ = 0.9°

about 1.1 grad

Table C-3. Equivalent units of angular measure.

ONE

INCHES

FEET

YARDS

STATUTE MILES

NAUTICLE MILES

mm

Inch

1

0.0833

0.0277

-

-

25.40

Foot

12

1

0.333

-

-

304.8

Yard

36

3

1

0.00056

-

914.4

Statute Mile

63,360

5,280

1,760

1

0.8684

-

Nautical Mile

72,963

6,080

2,026

1.1516

1

-

Millimeter

0.0394

0.0033

0.0011

-

-

1

Centimeter

0.3937

0.0328

0.0109

-

-

10

Decimeter

3.937

0.328

0.1093

-

-

100

Meter

39.37

3.2808

1.0936

0.0006

0.0005

1,000

Decameter

393.7

32.81

10.94

0.0062

0.0054

10,000

Hectometer

3,937

328.1

109.4

0.0621

0.0539

100,000

Kilometer

39,370

3,281

1,094

0.6214

0.5396

1,000,000

Myriameter

393,700

32,808

10,936

6.2137

5.3959

10,000,000

ONE

cm

dm

M

dkm

hm

km

mym

Inch

2.540

0.2540

0.0254

0.0025

0.0003

-

-

Foot

30.48

3.048

0.3048

0.0305

0.0030

0.0003

-

Yard

91.44

9.144

0.9144

0.0914

0.0091

0.0009

-

Statute Mile

160,930

16,093

1,609

160.9

16.09

1.6093

0.1609

Nautical Mile

185,325

18,532

1,853

185.3

18.53

1.8532

0.1853

Millimeter

0.1

0.01

0.001

0.0001

-

-

-

Centimeter

1

0.1

0.01

0.001

0.0001

-

-

Decimeter

10

1

0.1

0.01

0.001

0.0001

-

Meter

100

1

1

0.1

0.01

0.001

0.0001

Decameter

1,000

10

10

1

0.1

0.01

0.001

Hectometer

10,000

100

100

10

1

0.1

0.01

Kilometer

100,000

1,000

1,000

100

10

1

0.1

Myriameter

1,000,000

10,000

10,000

1000

100

10

1

Table C-4. Conversion factors.

Example I

Problem:

Reduce 76 centimeters to (?) inches.
76 cm x 0.3937 = 29 inches

Answer:

There are 29 inches in 76 centimeters.

Example II

Problem:

How many feet are there in 2.74 meters?

2.74

=

9 feet

——

.3048

Answer:

There are approximately 9 feet in 2.74 meters.

SCALE

1 INCH EQUALS

1 CENTIMETER EQUALS

1:5,000

416.67 feet
127.00 meters

164.00 feet
50.00 meters

1:10,000

833.33 feet
254.00 meters

328.10 feet
100.00 meters

1:12,500

1,041.66 feet
317.00 meters

410.10 feet
125.00 meters

1:20,000

1,666.70 feet
508.00 meters

656.20 feet
200.00 meters

1:25,000

2,083.30 feet
635.00 meters

820.20 feet
250.00 meters

1:50,000

4,166.70 feet
1,270.00 meters

1,640.40 feet
500.00 meters

1:63,360

5,280.00 feet
1,609.30 meters

2,078.70 feet
633.60 meters

1:100,000

8,333.30 feet
2,540.00 meters

3,280.80 feet
1,000.00 meters

1:250,000

20,833.00 feet
6,350.00 meters

8,202.00 feet
2,500.00 meters

1:500,000

41,667.00 feet
12,700.00 meters

16,404.00 feet
5,000.00 meters

Table C-5. Ground distance at map scale.

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