1. A. For convenience, the following may be used to convert English units of measurement to Metric units of measurement.

   Table 1813.A
   Unit of Measure	STARTING WITH the English unit of measurement	MULTIPLY BY	TO GET the Metric unit of measurement
   Length	inches ft	25.4 0.3048	mm m
   Area	sq in sq ft	645.16 0.0929	mm2 m2
   Volume	cu in cu ft gal	0.01639 28.3169 3.785	L L L
   Mass	lb	0.4536	kg
   Mass/unit length	plf (lb/ft)	1.4882	kg/m
   Mass/unit area	psf (lb/sq ft)	4.882	kg/m2
   Mass density	pcf (lb/cu ft)	16.02	kg/m3
   Force	lb	4.4482	N
   Force/unit length	plf (lb/ft)	14.5939	N/m
   Pressure	psi psf (lb/sq ft) in. of Hg @ 60°F	6.895 47.88 3.37685	kPa Pa kPa
   stress, modulus of elasticity	psi psf (lb/sq ft)	6.895 47.88	kPa Pa
   Second moment of area	In4	416,231	Mm4
   Section modulus	In3	16,387.064	mm3
   Temperature	°F-32 °F + 459.67	5/9 5/9	°C K
   Energy, work, quantity of heat	kWh Btu ft •lb (force)	3.6 1055 1.3558	MJ J J
   Power	ton (refrig) Btu/s hp (electric) Btu/h	3.517 1.0543 745.7 0.2931	kW kW W W
   Thermal conductance (U value)	Btu/f2 • h • °F	5.6783	W/m2 • K
   Thermal resistance (R value)	Ft2 • h • °F/Btu	0.1761	M2 • K/W
   Flow	gpm cfm	0.0631 0.4719	L/s L/s
   Illuminance	foot-candle (Im/sq ft)	10.76	Ix (lux)
   Velocity (speed)	mph	0.447	m/s
   Plane angle	°(angle)	0.01745	rad

Authority Note

AUTHORITY NOTE: Promulgated in accordance with R.S. 40:4(A)(7) and R.S. 40:5(2)(3)(7)(9)(16)(17)(20).

Historical Note

HISTORICAL NOTE: Promulgated by the Department of Health and Hospitals, Office of Public Health, LR 38:2924 (November 2012).