UNITS & SYMBOLS |
SYMBOL |
NAME |
l | length |
m | mass |
t | time |
I | electric current |
T | temperature |
l | illuminance |
n | ammount of substance |
α | angle |
Ω | solid angle |
m | metre |
kg | kilogram |
s | second |
A | ampere |
K | kelvin |
cd | candela |
(k)mol | (kilo)mol |
rad | radian |
sr | steradian |
SYMBOL | VALUE | UNIT | SYMBOL | CONVERSION |
A | area | square metre | m² | - |
V | volume | cubic metre | m³ | - |
f | frequency | hertz | Hz | s-1 |
F | force | newton | N | kg.m.s-2 |
p | pressure | Pascal | Pa | N.m-2 |
W | work, energy, quantity of heat | joule | J | N.m |
P | power | watt | W | J.s-1 |
a | charge | coulomb | C | A.s |
U | electric potential difference, electromotive force | volt | V | W.A-1 |
R | resistance | ohm | Ω | V.A-1 |
C | capacitance | farad | F | A.s.V-1 |
L | inductance | henry | H | V.s.A-1 |
G | conductance | siemens | S | Ω-¹ |
Φ | magnetic flux | weber | Wb | V.s |
B | magnetic flux density | tesla | T | Wb.m-2 |
Φ | luminous flux | lumen | lm | cd.sr |
E | illuminance | lux | lx | lm.m |
SI pefixes |
||
symbol | prefix | factor |
E | exa | 1018 |
P | peta | 1015 |
T | tera | 1012 |
G | giga | 109 |
M | mega | 108 |
k | kilo | 103 |
h | hecto | 1021 |
da | deca | 10 |
a | atto | 10-18 |
f | femto | 10-15 |
p | pico | 10-12 |
n | nano | 10-9 |
µ | micro | 10-6 |
m | milli | 10-3 |
c | centi | 10-2 |
в | deci | 10-1 |
symbol | value | unit | conversion |
a | time | year | 31.556.926 s |
d | day | 86.400 s | |
h | hour | 3.600 s | |
min | minute | 60 s | |
a | area | are | 10-2 m² |
ha | hectare | 104 m² | |
ca | centiare | 1 m² | |
b | barn | 10-28 m² | |
I | volume | liter | 10³ m³ |
t | mass | ton | 10³ kg |
° | angle | degree | p/180 rad |
' | minute | p/1800 rad | |
'' | second | p/64800 rad | |
°C | temperature difference | degree Celsius | 1°C = 1K |
bar | pressure | bar | 105 Pa |
eV | energy | electronvolt | 1,60210.10-19 J |
Wh | watt-hour | 3,6 kJ | |
kWh | kilowatt-hour | 3,6 MJ |
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