100
Mémento sur l’énergie 2014 - CEA
Préfixes des multiples et sous-multiples décimaux des unités
du Système international
Préfixe
Facteur
Symbole
Préfixe
Facteur
Symbole
exa
10 18
E
déci
10 -1
d
péta
10 15
P
centi
10 -2
c
téra
10 12
T
milli
10 -3
m
giga
10 9
G
micro
10 -6
µ
méga
10 6
M
nano
10 -9
n
kilo
10 3
k
pico
10 -12
p
hecto
10 2
h
femto
10 -15
f
déca
10 1
da
atto
10 -18
a
Unités de mesure anglosaxonnes
LONGUEURS (Length)
1 inch (in)
25,4 mm
1 foot (ft) = 12 inches
30,48 cm
1 yard (yd) = 3 feet
91,44 cm
1 rod, pole or perch = 5 1/2 yards
5,029 m
1 chain (ch) = 22 yards
20,12 m
1 furlong (fur) = 220 yards
201,168 m
1 mile = 8 furlongs
1,6093 km
1 league = 3 miles
4,828 km
SURFACES (Area)
1 square inch
6,4516 cm 2
1 sq. foot = 144 sq. inches
929,03 cm 2
1 sq. yard = 9 sq. feet
0,8361 m 2
1 acre = 4 roods = 4 840 sq. yards
0,405 ha
1 sq. mile = 640 acres
259 ha
VOLUMES (Capacity)
1 fluid ounce (GB)
28,41 ml
1 fluid ounce (US)
29,57 ml
1 pint (GB)= 20 fluid ounces
0,5683 l
1 pint (US) = 16 fluid ounces
0,4732 l
1 quart (GB) = 2 pints
1,1365 l
1 quart (US) = 2 pints
0,9464 l
1 gallon (GB) = 4 quarts
4,5461 l
1 gallon (US) = 4 quarts
3,7854 l
POIDS (Weights)
1 grain (gr)
64,8 mg
1 ounce (oz)= 437,5 grains
28,35 g
1 pound (lb) = 16 ounces
453,592 g
1 stone (GB) = 14 pounds
6,3503 kg
1 quarter = 2 stone
12,7 kg
1 (long) hundredweight (GB) = 112 pounds
50,8 kg
1 (short) hundredweight (US) = 100 pounds
45,36 kg
1 (long) ton (GB) = 2 240 pounds
1 016,047 kg
1 (short) ton (US) = 2 000 pounds
907,185 kg