Conversion Factors

Conversion Factors

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