TM 55-2350-224-14
APPENDIX A
CONVERSION TABLES
A-1. Common Metric Abbreviations
m = meter
dm = decimeter
cm = centimeter
mm = millimeter
A-2. Linear Measure
1 mi = 1609.35 m
1 yd= 0.9144 m
1 ft = 0.3048 m
1 in. = 0.0254 m
1 m = 10 dm = 100 cm = 1000 mm
A-3. Surface Measure
1 sq yd = 0.8361 sq m
1 sq ft = 0.0929 sq m
1 sq in. = 0.00065 sq m
A-4. Cubic Measure
1 cu yd= 0.76455 cu m
1 cu ft= 0.02831 cu m
1 cu in. = 0.000016 cu m
A-5. Weight
1 Ton = 1 STON = 907.185 kg = 2,000 lb
1 LTON = 2,240 lb = 1.0605t = 1016.05 kg
1 kg = 2.2046 lb
1 lb = 0.45359 kg
kg = kilogram
km = kilometer
t = metric ton
1 km = 0.6214 mi
1 m = 1.0936 yd
1 m = 3.2808 ft
1 m = 39.3700 in.
1 s q m = 1.196 sq yd
1 sq m = 10.764 sq ft
1 sq m = 1,550 sq in.
1 cu m = 1.31 cu yd
1 cu m = 35.30 cu ft
1 cu m = 61,023 cu in.
1 t = 2,204.62 lb
1 t = 1000 kg = 1 Tonne
A-6. The following simplified conversion factors are accurate to within 2 percent for quick computations:
a. Inches to centimetersMultiply in. by 10 and divide by 4.
b. Yards to metersMultiply yd by 9 and divide by 10.
c. Miles to kilometersMultiply mi by 8 and divide by 5.
d. Pounds to kilograms-Multiply lb by 5 and divide by 11.
A-7. The following conversions are provided for guidance when procuring lumber, wire rope, or wire in
areas that use the metric system. Lumber sizes are rounded off to the nearest 1/2 cm.
a. Lumber.
2-in x 4-in x desired length = 5-cm x 10-cm x desired length
1-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 desired length
1-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. Round off to next higher whole mm of available wire rope sizes.
3/8-in. dia = 9.5-mm dia
1/2-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
1-in. dia = 25.4-mm dia
1 1/4-in. dia = 31.7-mm dia
1 1/2-in. dia = 38.1-mm dia
c. Wire. No. 8 gauge annealed (11/64-in. dia) = 4.37-mm dia. Round off to the next higher whole mm of
available wire rope sizes.
A -1