o   PANJANG

1 ft      = 12 in

1 in      = 25,4 mm

1 mile  = 5280 ft  = 1760 yd  = 1,609 km

1 km    = 3281 ft = 1093,6 yd = 0,6214

 

o   LUAS

1 in2     = 6,452 cm2

1 in2     = 1550 in2 = 10,76 ft2 = 1,196 yd2

 

o   VOLUME

1 ft3     =  7,481 US gallon = 28,32 liter

1 in3     =  16,39 cm3

1 US gallon  = 3,785 liter

1 liter   = 0,03531 ft3  = 61,02 in3  = 0,2642 US gallon

 

o   KECEPATAN

1 ft/s    = 30,48 cm/s

1 m/s    = 3,281 ft/s      = 3,6 km/h

1 mile/h  = 1467 ft/s = 1,609 km/h = 0,8684 knot

1 km/h   =  0,278 m/s = 0,621 mil/h

 

o   PERCEPATAN

1 ft/s2   = 0,3048 m/s2

 

o   MASSA BERAT

1 lb      = 0,4536 kg = 7000 grains

1 kg     = 2,205  lb

 

o   MASSA JENIS

1 lb/ft3 = 16,02 kg/m3

1 gr/cm3   =  62,43 lb/ft3

 

o   GAYA

1 lb = 0,4536 kg (=0,4536 kp) = 4,448 N (newton)

1 kp  ( kilopond) = 2,205 lb = 9,807 N (newton)

 

o   TEKANAN

1 psi (=1 lb/in2 ) = 0,07031 kg/cm2 = 51,71 mm Hg pada 0 o C

1 kg/cm2 = 14,22 psi = 735,6 mm Hg pada 0 o C = 0,9807 bar

1 atm (standart ) = 14,7 psi = 1,033 kg/cm2 = 760 mm Hg pada 0 o C

1 bar = 105 N/m2 = 105 Pa = 1,0197 kg/cm2  = 14,50 psi

 

 

o   MOMEN PUTAR

1 lb ft = 0,1383 kgm = 1,305 Nm

1 kgm  = 7,233 lb ft  = 9,807 Nm

 

o   ENERGI DAN KERJA

1 ft lb  =  0,1383 mkg = 1,356 J = 1/778 BTU

1 mkg  = 7,233 ft lb = 9,807 J = 1/427 kcal

1 J  = 1 Ws = 107  erg

1 kcal = 427 mkg = 4187 J = 3,969 BTU

1 BTU  = 778 ft lb = 1055 J = 0,252 kcal

1 hp hr = 2545 BTU = 0,7475 kWh

1 PS hr  =  632,4 kcal = 0,7355 kWh

 

o   DAYA

1 W = 1 J/s = 1/1000 kW

Daya kuda metrik  : 1 PS = 75 mkg/s = 0,7355 kW = 0,9863 hp

Daya kuda non-metrik : 1 hp = 550 ft lb/s = 0,7475 kW = 1,014 PS

 

o   TEMPERATUR

o F        = 1,8 o C + 32

o R       =  o F + 460 = 1,8 o K

o K       =  o C + 273

 

o   KONSTANTA GAS UNIVERSAL

Ř = 1,986 BTU /(mole o R ) = 1545 ft lb / (mole o R )

1,986/cal/(gmole o K) = 848 ( m kg/k mole o K )

 

o   LAIN – LAIN

1 cal/gram = 1,8 BTU /lb

1 cal/(gram o K)  = 1 BTU / ( lb  o R )

 

1 Btu/lb = 0,56 cal/gram

19040 Btu/lb = 19040 x 0,56 cal/gram

                        = 10662 cal/gram

                        = 10,6621

0,001 k cal/gram

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