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# Military

## 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 feet127.00 meters 164.00 feet50.00 meters 1:10,000 833.33 feet254.00 meters 328.10 feet100.00 meters 1:12,500 1,041.66 feet317.00 meters 410.10 feet125.00 meters 1:20,000 1,666.70 feet508.00 meters 656.20 feet200.00 meters 1:25,000 2,083.30 feet635.00 meters 820.20 feet250.00 meters 1:50,000 4,166.70 feet1,270.00 meters 1,640.40 feet500.00 meters 1:63,360 5,280.00 feet1,609.30 meters 2,078.70 feet633.60 meters 1:100,000 8,333.30 feet2,540.00 meters 3,280.80 feet1,000.00 meters 1:250,000 20,833.00 feet6,350.00 meters 8,202.00 feet2,500.00 meters 1:500,000 41,667.00 feet12,700.00 meters 16,404.00 feet5,000.00 meters

Table C-5. Ground distance at map scale.