TECHNICAL INFORMATION AND
CALCULATIONS
Energy
Data and Units
| Basic
SI units |
Multiples |
| Length |
metre
(m) |
10-12 |
pico
(p) |
102 |
hecto
(h) |
| Mass |
kilogram
(kg) |
10-9 |
nano
(n) |
103 |
kilo
(k) |
| Time |
second
(s) |
10-6 |
micro
(m) |
106 |
mega
(M) |
| Electric
current |
ampere
(A) |
10-3 |
milli
(m) |
109 |
giga
(G) |
| Temperature |
kelvin
(K) |
10-2 |
centi
(c) |
1012 |
tera
(T) |
| Luminous
intensity |
candela
(cd) |
10-1 |
deci
(d) |
1015 |
peta
(P) |
| Amount
of substance |
mole
(mol) |
10 |
deca
(da) |
1018 |
exa
(E) |
Supplementary
and derived SI units
| Quantity |
Name |
Dimensions |
Quantity |
Name |
Dimensions |
| HEAT |
|
|
MASS |
|
|
| quantity
of heat, work, energy |
joule
(J) |
Nm |
Mass |
kilogram
(kg) |
M |
| Heat
flow rate. power |
watt
(W) |
J/s |
|
tonne
(=103kg) |
|
| Temperature |
|
|
DENSITY |
|
|
|
thermodynamic |
kelvin
(K) |
|
Density |
|
kg/m3 |
|
customary unit |
celsius
(C) |
|
FREQUENCY |
|
|
|
interval |
kelvin
(K) |
|
Frequency |
hertz
(Hz) |
/s |
| Heat
flow rate |
|
W/m2 |
ELECTRICAL |
|
|
| U-value |
|
W/m2K |
Potential |
volt
(V) |
W/A |
| Thermal
conductivity |
|
W/mK |
Electrical
resistance |
ohm
(V) |
V/A |
| FORCE/PRESSURE |
|
|
Magnetomotive
force |
ampere
(A) |
|
| Force |
newton
(N) |
|
Quantity |
coulomb
(C) |
As |
| Pressure,
stress |
pascal
(Pa) |
N/m2 |
Capacitance |
farad
(F) |
AAs/V |
| |
bar
(=105 Pa) |
|
Inductance |
henry
(H) |
Vs/A |
| VISCOSITY |
|
|
LIGHT |
|
|
| Viscosity
kinematic |
|
m2/s |
Luminous
flux |
lumen
(lm) |
|
|
dynamic |
|
Ns/m2 |
Illuminance |
lux
(Lx) |
lm/m2 |
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Conversion
factors SI/Imperial
LENGTH
|
km |
m |
mm |
mile |
foot |
inch |
micrometre (=micron) |
|
1 |
103 |
106 |
6.214 x 10-1 |
3.281 x 103 |
- |
- |
|
10-3 |
1 |
103 |
- |
3.281 |
3.937 x 10 |
106 |
|
- |
10-3 |
1 |
- |
- |
- |
103 |
|
1.609 |
1.609 x 103 |
- |
1 |
5.28 x 103 |
- |
- |
|
- |
3.048 x 10-1 |
3.048 x 102 |
- |
1 |
1.2 x 10 |
- |
|
- |
- |
2.54 x 10 |
- |
- |
1 |
2.54 x 104 |
|
- |
10-6 |
10-3 |
- |
- |
- |
1 |
AREA
| m² |
ft² |
in² |
| 1 |
1.076
x 10 |
1.55
x 103 |
| 9.29
x 10-2 |
1 |
1.44
x 10² |
| NOTE
: 1 are = 10²m²,
1 hectare = 104m2 |
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VOLUME
| m³ |
1 |
ft³ |
gal |
| 1 |
10³ |
3.531
x 10 |
2.200
x 10² |
| 10-³ |
1 |
3.531
x 10-² |
2.200
x 10-1 |
|
2.832 x 10-² |
2.832
x 10 |
1 |
6.229 |
| 4.546
x 10-3 |
4.546 |
1.605
x 10-1 |
1 |
| NOTE
: 1000 l = 1m³ |
MASS
| kg |
g |
lb |
grain |
| 1 |
10³ |
2.205 |
- |
| 10 |
1 |
- |
1.543
x 10 |
| 4.536
x 10 |
4.536
x 10² |
1 |
7.000
x 10³ |
| NOTE:
1 UK ton = 1.016 tonne. 1 tonne = 10³kg |
MASS/UNIT
LENGTH
| kg/m |
lb/ft |
| 1 |
6.720
x 10-1 |
| 1.488 |
1 |
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MASS/UNIT
AREA
| kg/m² |
lb/ft² |
| 1 |
2.048
x 10-1 |
| 4.882 |
1 |
SLOPE
| mm/m |
in/ft |
in/100ft |
| 1 |
1.2
x 10-2 |
1.2 |
| 8.333
x 10 |
1 |
102 |
| 8.333
x 10-1 |
10-2 |
1 |
FORCE
| N |
kN |
lbf |
| 1 |
10-3 |
2.248
x 10-1 |
| 103 |
1 |
2.248
x 102 |
| 4.448 |
4.338
x 10-3 |
1 |
POWER
| W |
hp |
| 1 |
1.341
x 10-3 |
| 7.457
x 102 |
1 |
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QUANTITY
OF HEAT
| MJ |
kWh |
Btu |
| 1 |
2.778
x 10-1 |
9.478
x 102 |
| 3.6 |
1 |
3.412
x 103 |
| 1.055
x 10-3 |
- |
1 |
SPECIFIC
HEAT
| kJ/kgK |
Btu/lb
degF |
| 1 |
2.3388
x 10-1 |
| 4.187 |
1 |
EXPANSION
COEFFICIENTS
| 1/K |
1/degF |
mm/mK |
in/100ft
degF |
| 1 |
1.800 |
10³ |
2.160
x 10³ |
| 5.556
x 10-1 |
1 |
5.556
x 102 |
1.200
x 10³ |
| 10-3 |
1.800
x 10-3 |
1 |
2.160 |
| 4.630
x 10-4 |
8.333
x 10-4 |
4.630
x 10-1 |
1 |
| These
are for values of ;where
extension = ;x
temperature change x original length |
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| 