Conversion Factors

1ft = _ m

0.3048

1yd = _ ft

3

1ft = _ in

12

1 mi = _ ft

5280

1m³= _ L

1000

1ft³= _ gal

7.481

1 lb_m= _ g

454

1 lb_m= _ oz

16

1 slug = _ lb_m

32.174

1 atm = _ kPa

101.3

1 atm = _ mm Hg

760

1 atm = _ bar

1.013

1 atm = _ psi 

14.7

psi units also equal

lb_f / in²

1 atm = _ ft H₂O

33.91

1 cal = _ J (Referring to cal not Cal/kcal)

4.184

1 kWh = _ J

3.6 × 10⁶

1 BTU (British Thermal Unit) = _ J

1055

1 BTU = _ ft⋅lb_f

778.2

1 hp-hr = _ BTU

2545

Celsius Water Freezing point, boiling point

0, 100

Fahrenheit water freezing point, boiling point

32,212

Kelvin Water absolute zero, freezing point

0, 273.15

Rankine Scale water absolute zero, freezing point

0, 461.67

T(K) = 

T (°R) * 5/9

T (°R) =

T(K) * 9/5

g_c =

32.174 lb_m⋅ft / (lb_f⋅s²)

giga (G)

10⁹

mega (M)

10⁶

kilo (k)

1,000

hecto (h)

100

deca (da)

10

deci (d)

0.1

centi (c)

.01

milli (m)

.001

micro (μ)

10^-6

nano (n)

10^-9