기본필독코스 1단계 각종 단위 환산표

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각종  단위  환산표

길 이  (Length)		무  게  (Mass)
1 mm	= 0.0393 inch	1 g	=  0.0353 oz
1 cm	= 0.3937 inch	1 kg	=  2.205 lb
1 m	= 3.2808 ft	1 oz	=  28.35 g
1 m	= 1.0936 yd	1 lb	=  0.4536 kg
1 in	= 25.4 mm
1 in	= 2.54 cm	온  도  (Temperature)
1 ft	= 0.3048 m	0 ℃	=  32 ℉
1 yd	= 0.9144 m	℃	=  5/9. (℉ - 32)
		℉	=  9/5. (℃) + 32
부  피  (Volume)
1 ㎤	= 0.061 in3 = 1 ml	에너지  (Energy)
1 ㎥	= 1.308 yard3	1 Joule	=  1 J  =  1 Wsec
1 litre	= 0.035 ft		=  0.2388 cal
1 litre	= 1.761 UK pints	1 kilo-Joule	=  1 kJ  =  1000 J
1 litre	= 0.22 UK gallon		=  0.9478 BTU
1 litre	= 2.113 US pints	1 cal	=  1 frigory = 4.186 J
1 litre	= 1.057 US quarts	1 kcal	=  4.1865 kJ
1 litre	= 0.2642 US gallon	1 BTU	=  1.055 kJ
1 in3	= 16.387 ㎤
1 yard3	= 0.7646 ㎥	주파수  (Frequency)
1 ft3	= 28.32 litre	1 Hertz	=  1 Hz  =  1 cycle/sec
	= 1 UK fl/oz		=  60 cycles/min (cpm)
	= 28.41 ㎤	1000 cpm	=  1000/60 Hz = 16.67 Hz
1 UK pint	= 0.57 litre
1 UK gallon	= 4.5461 litre	힘  (Force)
1 US pint	= 0.4732 litre	1 newton	=  1 N  =  0.2248 lbf
1 US quart	= 0.9463 litre	1 dyne	=  0.01 N
1 US fl/oz	= 29.57 ㎤	1 kgf	=  9.806 N
1 US gallon	= 3.785 litre	1 lbf	=  4.448 N
압  력  (Pressure)		전  력  (Power)
1 Bar	= 1000 mBar = 105 Pa	1 watt	=  1 W  =  1 J/sec
	= 1.02 kgf/㎠		=  0.2388 cal/sec
	= 0.988 atm	1 kilowatt	=  1 kW  =  1000 W
	= 14.5 lb/in2 (psi)		=  860 kcal/h
1 mBar	= 0.1 kPa		=  1.36 pk  =  1.34 hp
1 kPa	= 1 kN/㎡  = 10 mBar	1 cal/sec	=  4.186 W
1 Pascal	= 1 Pa = 1 N/㎡	1 kcal/h	=  1.163 W
	= 0.01 mBar	1000 frig/h	=  1.163 W
1 lbf/in2	= 0.07 kg/㎠ = 0.068 atm	1 Brit ton of refr.	=  3.89 kW
	= 6.894 kPa = 68.94 mBar	1 US ton of refr.	=  200 BTU/min = 3.51 kW
	= 0.069 Bar	1 kWh	=  3600000 J  =  3.6 MJ
1 kgf/㎠	= 1 atm = 98.066 kPa	1 pk	=  0.735 kW
	= 0.9806 Bar	1 hp	=  0.7457 kW
1 atm	= 101.325 kPa
	= 1.0132 Bar	진  공  (Vacuum)
1 mm Hg	= 1 Torr  =  0.1333 kPa	Pressure unites ;
	= 1.333 mBar	1 atm	= 760 Torr
1 mm H2O	= 9.804 Pa = 98.066 mBar	1000 mBar	= 750 Torr = 105 Pa
		1 Pa	= 0.01 mBar = 1.10-5 Bar
빛  (Light)			= 7.5x10-3 Torr
Color temperatures                   K			= 9.87x10-5 atm
Candlelight                              = 1930			= 1.45x10-4 lbf/in2 (psi)
Tungsten lamp, home use        = 2800			= 1.02x10-5 kgf/㎠
Quartz halogen lamp                = 3200			= 2.953x10-4 in Hg
Fluo. lamp, warm white             = 4500			= 7.5x10-4 mm Hg
Fluo. lamp, daylight                  = 6500			= 4.015x10-3 in H2O
Clear sky                                 =10000			= 0.102 mm H2O
Luminance                               Lux			= 7.5 micron
Clear, mid-day sky                   =100000			= 99.99 + % vacuum
Cloudy, mid-day sky                = 32000			= 1 N/㎡
Office, under fluo. light             = 500		1 atm	= 1.013 105 Pa
Candle light, distance of 20cm  = 10			= 101.325 kPa
		1 Torr	= 1.333 102 Pa = 1mm Hg
자  력 (Magnetism)		1 mm Hg	= 1.333x102 Pa
Magnetic field strength ;		1 micron	= 1㎛ Hg
2.76 x Vp-p       Hp-p   =  -----------   =  Oersted                             f		Pumping speed units ;
		1 l/s	= 60 l/min = 2.12ft3/min
			= 3.6㎥/h
220 x Vp-p       Hp-p   =  -----------   =  Ap-p/m                             f		1 ft3/min	= 0.472 l/s = 28.32 l/min
			= 1.7㎥/h
		1 ㎥/h = 0.278 l/s	= 16.67 l/min
H  =  A/m   (H = ±0.0125 Oersted)			= 0.589ft3/min
Magnetic field strength ;		Leak rate units ;
B = μ  x H      B = Tesla = 104 Gauss		1 Torr l/s	= 1.333 mBarl/sec
μ  = μo x μr			= 1.316 atm ㎤/sec
μr = 1 in vacuum and air			= 103 lusec
μo = 4π x 10-7 Vsec/A.m			= 2.795x10-3 atm.ft3/min
Oersted         = 103/4π A/m = 79.6 A/m			= 2.083x105 grammes/year
			(Freon 12)
Flow			= 5.7x10-3 kg/h (air)
1 litre/min	= 5.886x10-4 ft3/sec
1 litre/min	= 4.403x10-3 US gall/sec	Moment (Torque)
1 litre/min	= 0.0037x10-3 UK gall/sec	1 newton meter	= 1Nm = 0.102 kgfm
1 ft3/min	= 0.472 litre/sec	1 Nm	= 0.7375 lbft
1 US gall/min	= 0.0631 litre/sec	1 lbft	= 1.356 Nm
1 US gall/min	= 0.076 litre/sec	1 kgfm	= 9.8 Nm