Measurements and Conversions

Length
To Change
To
Multiply By
inches
centimeters
2.538
inches
millimetes
25.4
centimeters
inches
0.394
meters
inches
39.37
feet
centimeters
30.48
feet
meters
0.305
feet
yards
3
yards
meters
0.914
meters
yards
1.094
miles
kilometers
1.609
kilometers
miles
0.621
Area
To Change
To
Multiply By
square inches
square centimeters
6.452
square centimeters
square inches
0.155
square feet
square meters
0.093
square yards
square meters
0.836
square meters
square yards
1.196
square miles
square kilometers
2.59
square acres
square hectares
0.164
Volume
To Change
To
Multiply By
ounces (fluid)
cubic centimeters
29.573
cubic centimeters (cc)
ounces (fluid)
0.034
quarts
liters
0.946
liters
quarts
1.057
gallons
liters
3.785
cubic inches
cubic centimeters (cc)
16.387
cubic yards
cubic meters
0.765
grains
milligrams
64.799
ounces (dry)
grams
28.349
pounds (dry)
grams
453.592
pounds (dry)
kilograms
0.453
kilograms
pounds
2.205
Length Equivalents
12 inches
1 foot
3 feet
1 yard
5 1/2 yards or 16 1/2 feet
1 rod
40 rods or 220 yards
1 furlong
5,280 feet
1 mile
1,760 yards
1 mile
320 rods
1 mile
8 furlongs
1 mile
3 miles
1 league
1 hand
4 inches (height of horses)
1 fathom
6.080 feet (used to measure depth at sea)
1 nautical mile
1.151 land miles (equals distance at sea)
1 inch
2.540 centimeters
1 foot
0.305 meters
1 yards
0.914 meters
1 mile
1.609 kilometers
1 fathom
6 feet
1 knot
6,086 feet
3 knots
1 league
1 centimeter
0.394 inches
3.281 feet of 1.094 yards
1 meter
0.621 mile
1 kilometer
9 square feet
1 square yard
272.25 square feet
1 square rod
30 1/2 square yards
1 square rod
Square or Surface Measure
144 square inches
1 square foot
160 square rods
1 acre
1 rood
40 square rods
4 roods
1 acre
1 hector
2.258 acres
640 acres
1 square mile
1 square mile
1 section
36 sections
1 township
Surveyor's or Chain Measure
7.920 inches
1 link
25 links
1 rod
100 links
1 chain
66 feet
1 chain
4 rods
1 chain
10 chains
1 furlong
80 chains
1 mile
43,560 square feet
1 acre
160 square rods
1 acre
10 square chains
1 acre
640 acres
1 square mile
36 square miles
1 township
To Change
To
Fahrenheit
Celsius
Celsius
Fahrenheit

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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