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Design Notes

 

Engineering Conversion
Factors

Accuflect® Reflector Design

Accuflect® IR Background Notes

 

 

Engineering Conversion Factors

To Convert From

To

Multiply By

Length

miles (mi)

meters (m)

1609.3

feet (ft)

meters (m)

.3048

inches (in)

meters (m)

.0254

 

 

 

Area

square feet (ft2)

square meters (m2)

9.29 x 10–2

square inches (in2)

square meters (m2)

6.452 x 10–4

 

 

 

Volume

cubic feet (ft3)

cubic meters (m3)

.0283

fluid ounces — US (fl oz)

cubic meters (m3)

2.957 x 10–5

gallons — US (gal)

cubic meters (m3)

3.785 x 10–3

 

 

 

Volume per
Unit Time

ft3/min

m3/s

4.719 x 104

in3/min

m3/s

2.732 x 10–7

 

 

 

Mass

ounces (oz)

kilograms (kg)

.0283

pounds (lb)

kilograms (kg)

.4536

ton-short (2000lb) (T)

kilograms (kg)

907.185

 

 

 

Mass per
Unit Area

oz/ft2

kg/m2

.3052

 

 

 

Mass per
Unit Time

lb/h

kg/s

1.26 x 10–4

 

 

 

Mass per
Unit Volume

g/cm3

kg/m3

1000

oz(avoirdupois)/in3

kg/m3

1730

lb/in3

kg/m3

2.768 x 104

lb/ft3

kg/m3

16.018

 

 

 

Volume per
Unit Time

ft3/min

m3/s

4.719 x 10–4

in3/min

m3/s

2.732 x 10–7

gal/min

m3/s

6.309 x 10–5

 

 

 

Velocity

ft/min

m/s

5.08 x 10–3

in/s

m/s

.0254

mi/h

m/s

.447

 

 

 

Viscosity

poise (P)

pascal-second (Pa•s)

.1

stokes (St)

m2/s

10–4

 

 

 

Force

dyne

Newton (N)

10–5

kgf

Newton (N)

9.807

lbf

Newton (N)

4.448

 

 

 

Force per
Unit Length

lbf /ft

N/m

14.594

 

 

 

Stress per
Unit Area

Atmosphere (standard)

Pa

1.0133 x 105

torr (mm Hg 0°C)

Pa

133.32

inches of Hg (60°F)

Pa

3376.9

inches of H2O (60°F)

Pa

248.84

lbf /in2

Pa

6894.8

centimeters of Hg (0°C)

Pa

1333.2

kgf /cm2

Pa

9.807 x 104

 

 

 

Energy

Btu (International)

Joule (J)

1055.06

ft•lbf

Joule (J)

1.356

Kilowatt hour (kW•h)

Joule (J)

3.6 x 106

calorie (cal)(International)

Joule (J)

4.1868

 

 

 

Energy per
Unit Area Time

Btu(International)/(ft2•s)

W/m2

1.136 x 104

erg/(cm2•s)

W/m2

10-3

 

 

 

Heat

Btu(Int'l)•in/(hr•ft2•°F)

W/(m•°K)

.144

Btu(Int'l)•in/(s•ft2•°F)

W/(m•°K)

519.22

cal(Int'l)/g

J/kg

4186.8

Btu(Int'l)/(lb•°F)

J/(kg•°K)

4186.8

cal(Int'l)/(g•°C)

J/(kg•°K)

4186.8

 

 

 

Power

Btu(Int'l)/s

W

1055.1

cal (Int'l)/s

W

4.187

erg/s

W

10-7

ft•lbf /s

W

1.356

Horsepower (hp) 550 ft•lb/s

W

745.7

 

 

 

Temperature

°C

°K

Tk=Tc + 273.15

°F

°C

Tc=(Tf – 32)/1.8

 

 

 

Light

cd/in2

cd/m2
(candela/sq. meter)

1550

 

 

 

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