FM3-25.26 APPENDIX C UNITS OF MEASURE AND CONVERSION FACTORS

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 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

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.

NEWSLETTER

Join the GlobalSecurity.org mailing list

Military

APPENDIX C

UNITS OF MEASURE AND CONVERSION FACTORS

Example I

Example II