Conversion Factors

Conversion Factors

Length    Flowrate     Pressure (in psi) to Feet of Water     Pressure (Liquid Pumps)
    Pressure/Vacuum     Volume (Liquid Pumps)     Miscellaneous     Volume
    Mass     Comparative Particle Size     Density Conversions     Temperature

Length

Multiply —> to get
to get Divide
inch 2.54 cm
ft 12 inch
ft 0.305 meter
yard 1.094 meter
Angstrom 1010 meter

Flowrate
Multiply —> to get
to get Divide
cc/min 1 mL/min
cfm (ft3/min) 28.31 L/min
cfm (ft3/min) 1.699 m3/hr
cfh (ft3/hr) 472 mL/min
cfh (ft3/hr) 0.125 GPM
GPH 63.1 mL/min
GPH 0.134 cfh
GPM 0.227 m3/hr
GPM 3.785 L/min
oz/min 29.57 mL/min

Pressure (in psi) to Feet of Water
psi ft of
water
psi ft of
water
psi ft of
water
1 2.31 13 30.0 45 103.9
2 4.62 14 32.3 50 115.5
3 6.93 15 34.7 55 127.1
4 9.24 16 37.0 60 138.6
5 11.6 17 39.3 65 150.1
6 13.7 18 41.6 70 161.7
7 16.2 19 43.9 75 173.3
8 18.5 20 46.2 80 184.8
9 20.8 25 57.7 85 196.3
10 23.1 30 69.3 90 207.9
11 25.4 35 80.9 95 219.5
12 27.7 40 92.4 100 231.0

Pressure (Liquid Pumps)
Multiply —> to get
to get Divide
psig 2.31 feet of water
psia 6.9 kilopascals
psig 2.03 inches of Hg
psia 0.068 atm
psia 0.068 bar
atm 33.9 feet of water
atm 760 mm Hg
inches Hg 1.133 feet of water
mm Hg 0.039 inches Hg
newtons/m2 1 pascals

Pressure/Vacuum
Multiply —> to get
to get Divide
atm 33.9 ft H2O
atm 760 mm Hg
atm 1033.2 g/cm2
atm 14.70 psi
atm 1.013 bar
atm 101.3 kPa
bar 14.5 psi
bar 0.9869 atm
bar 100 kPa
ft H2O 0.4335 psi
kPa 0.01 dyne/cm2
kPa 0.1450 psi
kPa 7.5 mm Hg
psi 0.0703 kg/cm2

Volume (Liquid Pumps)
Multiply —> to get
to get Divide
gallons 128 fluid ounces
gallons 3.785 liters
liters 1000 cubic centimeters
lb water 0.119 gallons
gallons (Imp) 1.2 gallons (U.S.)
cubic ft 7.48 gallons
cubic in. 0.00433 gallons
cubic cm 0.0338 fluid ounces
cubic meters 264.2 gallons
cubic meters 1000 liters

Miscellaneous
Multiply —> to get
to get Divide
hp 0.746 kW
hp 42.44 Btu/min
hp 396COMMACOMMACOMMASTEVE000 lb in/min
hp 1.014 metric hp
watts 0.7376 lb ft/sec
watts 44.25 lb ft/min
lb-ft 0.1368 kg-m
oz-in 0.072 kg-cm
oz-in 70COMMACOMMACOMMASTEVE600 dyne-cm
oz-in 0.00706 Nm
gauss 0.0001 tesla

Volume
Multiply —> to get
to get Divide
cubic cm (cc) 1 mL
oz (fluid) 29.57 mL
cubic ft (ft3) 7.48 gal
cubic ft (ft3) 0.0283 m3
gal 128 oz (fluid)
gal 3.785 liters
gal 0.8333 imp gal
cubic meters 1000 liters

Mass
Multiply —> to get
to get Divide
Apoth dram 60 grains
Apoth dram 0.1371 Avdp oz
Apoth dram 0.008571 Avdp lb
Apoth dram 3.88794 grams
Apoth lb 5760 grains
Apoth lb 13.1657 Avdp oz
Apoth lb 0.822857 Avdp lb
Apoth lb 373.242 grams
Apoth oz 480 grains
Apoth oz 1.09714 Avdp oz
Apoth oz 0.068571 Avdp lb
Apoth oz 31.1035 grams
Avdp drams 27.344 grains
Avdp drams 0.0625 Avdp oz
Avdp drams 0.003906 Avdp lb
Avdp drams 1.77185 grams
Avdp lb 7000 grains
Avdp lb 16 Avdp oz
Avdp lb 453.592 grams
Avdp oz 437.5 grains
Avdp oz 0.0625 Avdp lb
Avdp oz 28.3495 grams
carats 3.0865 grains
carats 0.2 grams
grams 15.432 grains
grams 0.0353 oz
lb 0.4536 kg
oz 28.35 grams

Comparative Particle Size
U. S. mesh Inches Microns U. S. mesh Inches Microns
3 0.265 6730 40 0.0165 420
3-1/2 0.223 5660 45 0.0138 354
4 0.187 4760 50 0.0117 297
5 0.157 4000 60 0.0098 250
6 0.132 3360 70 0.0083 210
7 0.111 2830 80 0.0070 177
8 0.937 2380 100 0.0059 149
10 0.787 2000 120 0.0049 125
12 0.0661 1680 140 0.0041 105
14 0.0555 1410 170 0.0035 88
16 0.0469 1190 200 0.0029 74
18 0.0394 1000 230 0.0024 63
20 0.0331 841 270 0.0021 53
25 0.0280 707 325 0.0017 44
30 0.0232 595 400 0.0015 37
35 0.0197 500 — — —

Density Conversions

Specific Gravity x 1 = g/L

g/L x 8.345404 = lb/gal lb/gal x 0.119826 = g/mL

Temperature

°F = (1.8 x °C) 32

°C = (°F - 32) x 0.555

°Kelvin = °C 273.2