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Reference Data – Converters

 
LENGTH 1in = 25.4mm 1mm = 0.039in 
1ft = 30.5cm 1cm = 0.033ft 
1yd = 0.914m 1m = 1.094yd 
1mi = 1.61km 1km = 0.62mi 
AREA     1in2 = 645mm2 1mm2 = 0.002in2
1in2 = 6.45cm2 1cm2 = 0.155in2
1ft2 = 929cm2 1cm2 = 0.00107ft2
1yd2 = 0.836m2 1m2 = 1.2yd2
1ac2 = 0.405ha2 1ha2 = 2.47ac2
1mi2 = 2.59km2 1km2 = 0.387mi2
PRESSURE   
1psi = 6.9kpa 1kpa = 0.145psi
1in of water = 249kpa 1pa = 0.004in water
1ft of water = 0.433psi 1psi = 2.31ft of water
1ft of water = 0.305m of water 1m of water = 3.28ft of water
1kg f/sq cm = 98kpa 1kpa = 0.01kg f/sq cm
1bar = 100kpa 1kpa = 0.01bar
1bar = 10m head  
VELOCITY 1ft/s = 0.305m/s 1m/s = 0.039in
1m/s = 3.6km/h 1km/h = 0.033ft
1mi/h = 1.6093 km/h 1km/h = 0.6214mi/h
LIQUID
MEASURE
1 imp gal = 0.00455 m3 1 m3 = 220 imp gal
1 US gal = 0.00378 m3 1 m3 = 264.2 US gal
1 imp gal = 1.201 US gal 1 US gal = 0.8327 imp gal
1 US bbl
= 34.97 imp gal / 42
US gal / 0.159 m3
 
VOLUME 1in3 = 16.38cm3 1cm3 = 0.061in3
1ft3 = 0.028m3 1 m3 = 35.31ft3
1yd3 = 0.7646m3 1m3 = 1.307yd3
1m3 of water = 1kl of water  
1kl = 1000ltrs  
1t of water = 1m3   
FORCE 1lb force = 4.4448n 1n = 0.2249lb force
1ft/lb = 1.3557nm 1nm = 0.737lb force
FLOW RATE 1ft3/min = 0.472L/sec 1L/sec = 2.1189 cubic ft3/min
1ft3/min = 0.0283m/min 1m3/min = 35.31 cubic ft3/min
1 imp gal/min = 0.076L/sec 1L/s = 13.2 imp gal/min
1 US gal/min = 0.063L/sec 1L/s = 15.85 US gal/min
1 imp gal/min = 0.2728 cubic
metre/hr
1m3/hr = 3.666 imp gal/min
1 US gal/min = 0.2271 cubic
metre/hr
1m3/hr = 4.403 US gal/min
1L/s = 543.439 barrels/day 1bbl/day = 0.002 litres/sec
PRESSURE CËš = F° minus 32 divide by 1.8
FËš = C° multiply by 1.8 and add 32
KËš = C° + 273.15
POWER 1 horsepower = 550 ft lbs/sec 1 kilowatt = 1.341 horsepower
1 horsepower = 0.7457 kilowatts  
EQUIVALENTS TO
1 ATMOSPHERE
 76 centimetres (760mm) of mercury  33.899 feet of water
29.921 inches of mercury  14.696 psi 
10.3322 metres of water 101.325 kilopascal 
406.782 inches of water  
ELECTRIC MOTOR
POLE SPEEDS
POLES 50 HZ 60 HZ
2 3000 3600
4 1500 1800
6 1000 1200
8 750 900
10 600 720
12 500 600
HORSEPOWER
TO
TORQUE
Horsepower = Torque ft/lb rpm divide by 5252
Torque (ft / lb) = Horsepower x 5252 divide by rpm
Torque (in / lb) = Horsepower x 63025 divide by rpm

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