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Conversion Tables

Metric Units

Quantity Unit Symbol
Length metre m
Mass kilogram kg
Time second s
Electric Current ampere A
Thermodynamic Temperature kelvin K
Luminous intensity candela cd
Amount of substance only used in physical chemistry mole mol
Force newton N
Energy joule J
Frequency hertz Hz
Pressure and stress pascal Pa
Power watt W
Quantity of electricity coulomb C
Electric potential volt V
Electric Capacitance Farad F
Electric resistance ohm Ω
Electric conductance siemens S
Magnetic flux weber Wb
Inductance henry H
Luminous flux lumen lm
Illuminance lux lx

Units of Conversion Factors

Measurement Equals
1 ft of water Pressure of 0.434 lb/sq in
1 m of water Pressure of 1.43 lb/sq in
2.31 ft of water Pressure of 1 lb/sq in
34 ft of water 1 atmosphere (14.7 lb/sq in)
Pressure in atmosphere 62.39 lb
One cu ft of water 62.39 lb
One cu ft of salt water 64 lb (or 1/35th ton)

Temperature: Fahrenheit to Celcius (Centigrade)

° F ° C ° F ° C ° F ° C
212 100 100 37.7 45 7.2
200 93.3 95 35 40 4.4
190 87.7 90 32.2 35 1.7
180 82.2 85 29.4 32 0.0
170 76.6 80 26.7 30 -1.1
160 71.1 75 23.9 25 -3.9
150 65.5 70 21.1 20 -6.7
140 60 65 18.3 15 -9.4
130 54.4 60 15.6 10 -12.2
120 48.8 55 12.8 5 -15.0
110 43.3 50 10.0 0 -17.7

Conversion Factors and Tables

To Convert Multiply By   To Convert Multiply By
Areas   Power
 sq in to sq mm  645.16    horsepower to kW  0.7457
 sq in to sq cm  6.4516    hp to metric hp  1.014
 sq ft to sq m  0.0929    metric hp to kW  1.341
 sq yd to sq m  0.8361    kW to hp  1.342
 acres to sq m  4046.86    metric hp to hp  0.9862
 acres to sq yd  4840    kW to metric hp  1.359
 sq mm to sq in  0.00155   Force
 sq m to sq ft  10.76    1 bf to N  4.4482
 sq m to sq yd  1.196    kgf to N  9.8066
 sq m to acres  0.000247    N to 1bf  0.2248
 sq yd to acres  0.0002    N to kgf  0.101972
Pressure   Mass
 lb/sq in to kg/sq m  0.0703    oz to grams  28.35
 lb/sq ft to kg/sq m  4.88    lb to kg  0.4536
 lb/sq in to ft of water  2.31    tons to tonnes (1000kg)  1.016
 lb/sq in to atmospheres  0.068    tons to short (US) tons  1.12
 kg/sq cm to lb sq in  14.22    grams to oz  0.0353
 kg/sq m to lb/sq ft  0.205    kg to lb  2.205
 ft of water to lb/sq in  0.433    tonnes to tons (2240 lb)  0.9842
 atmospheres to lb/sq in  14.7    short (US) tons to tons  0.893
Speed   Distance
 ft/sec to m/sec  0.3048    in to mm  25.4
 ft/sec to knots  0.592    in to cm  2.54
 ft/sec to miles/hr  0.682    ft to m  0.3048
 ft/m to m/sec  0.0051    yd to m  0.914
 knots to miles/hr  1.1515    fathomes to m  1.8288
 miles/hr to km/hr  1.6093    statute miles to km  1.609
 knots to km/hr  1.852    nautical miles to statute  1.1515
 m/sec to ft/sec  3.281    mm to in  0.0394
 knots to ft/sec  1.689    cm to in  0.394
 miles/hr to ft/sec  1.467    m to ft  3.2808
 m/sec to ft/min  196.8    m to yd  1.094
 miles/hr to knots  0.868    m to fathoms  0.5468
 km/hr to miles/hr  0.6214    kn to statute  0.6215
 km/hr to knots  0.54    statue miles to naut  0.8684
Volumes   Torque
 cu in to cu cm  16.387    lb ft to Nm  1.3558
 cu ft to cu m  0.0283    kgf m to Nm  9.8066
 cu ft to gals  6.25    lbf ft to kgf m  0.1383
 cu ft to litres  28.33    Nm to lbf ft  0.7376
 pints to litres  0.568    Nm to kgf m  0.102
 gals to litres  4.546    kgf m to lbf ft  7.233
 Imp gals to US gals  1.2  
 US barrels to cu m  0.16  
 cu cm to cu in  0.061  
 gals to cu ft  0.16  
 litres to cu ft  0.035  
 litres to pints  1.76  
 litres to gals  0.22  
 US gals to Imp gals  0.833  

 

 

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