Specifications

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Appendix A
A. U.S. Customary Measure and Metric Measure
Conversion
Table A-1 lists some useful conversions between U.S. customary measure and metric
measure.
Table A-1 U.S. Customary-to-Metric Conversions
U.S. Customary Metric
1 inch 2.54 cm
1 foot 30.48 cm
1 square foot (ft
2
) 0.093 m
2
1 pound (lb) 0.4536 kg
1 lb/ft
2
4.88 kg/m
2
1 cubic feet per minute
(cfm)
0.00047 m
3
/s
1 British thermal unit
(Btu)
1055 joules
0.3937 in. 1 cm
39.37 in. 1 m
10.76 ft
2
1 m
2
2.205 lbs 1 kg
0.205 lb/ft
2
1 kg/m
2
2127.66 cfm 1 m
3
/s
0.00095 Btu 1 joule