TM-55-2320-273-14
TRUCK TRACTOR, LINE-HAUL
TECHNICAL MANUAL; TRANSPORTABILITY GUIDANCE
AUGUST 1986
TM-55-2320-273-14 - Page 33 of 40
TM 55-2320-273-14
APPENDIX A
CONVERSION TABLES
1. Common Metric Abbreviations.
m = meter
dm = decimeter
cm = centimeter
mm = millimeter
kg = kilogram
km = kilometer
MT = metric ton
2. Linear Measure.
1 mi = 1,609.35 m
1 yd = 0.9144 m
1 ft = 0.3048 m
1 in. = 0.0254 m
lm = l0 dm = 100cm = l000 mm
1 km = 0.6214 mi
1 m = 1.0936 yd
1 m = 3.2808 ft
1 m = 39.3700 in.
3. Surface Measure.
1 yd² = 0.8361 m
2
1 ft
2
= 0.0929 m
2
1 in.
2
= 0.00065 m
2
l m
2
=
1.196 yd
2
l m
2
=
10.764 ft
2
lm² = 1,550 in.
2
4. Cubic Measure.
1 yd³ = 0.76455 m³
1 ft
3
= 0.02831 m³
1 in.³ = 0.000016 m³
1 m³ = 1.31 yd³
1 m³ = 35.30 ft³
1 m³ = 61,023 in.³
5. Weight.
1 STON = 907.185 kg
1 lb = 0.45359 kg
1 kg = 2.2046 lb
1 MT = 1,000 kg
1 MT = 2,204.62 lb
6. The following simplified conversion factors are ac-
curate to within 2 percent for quick computations:
a. Inches to centimeters—
Multiply in. by 10 and di-
vide by 4.
b. Yards to meters-
Multiply yd by 9 and divide by
10.
c.
Miles to kilometers—
Multiply mi by 8 and divide
by 5.
d. Pounds to kilograms-
Multiply lb by 5 and divide
by 11.
Paragraph 7-37, FM 55-15 and paragraph 2-15, TM
55-450-15 contain additional detailed conversion fac-
tors.
7. The following conversions are provided for guid-
ance for procurement of lumber, wire rope, or wire in
areas that use the metric system. Lumber sizes are
rounded to nearest 1/2 cm.
a.
Lumber.
2-in. x 4-in. x desired length = 5-cm x 10-cm x de-
sired length
l-in. x 6-in. x desired length = 2.5-cm x 15-cm x
desired length
6-in. x 8-in. x desired length = 15-cm x 20-cm x de-
sired length
l-in. x 12-in. x desired length = 2.5-cm x 30-cm x
desired length
(length normally expressed in ft or m.)
b. Wire rope.
3/8-in. dia = 9.5-mm dia
l/2-in. dia = 12.7-mm dia
5/8-in. dia = 15.8-mm dia
3/4-in. dia = 19.0-mm dia
7/8-in. dia = 22.2-mm dia
l-in. dia = 25.4-mm dia
l-1/4-in. dia = 31.7-mm dia
l-1/2-in. dia = 38.1-mm dia
Round to next higher whole mm of available wire rope
sizes,
c.
Wire.
No. 8 gauge annealed (11/64-in. dia) =
4.37-mm dia. Round off as in
b
above.
A-1
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